TD

Author

The Desk

Editorial desk

web application security · secure development · network defence · security education

The Desk is the editorial voice of About Hacking. Everything here is published under it rather than under a personal byline, because what matters is whether an explanation holds up, not who signed it.

The aim is narrow and worth stating plainly: explanations a reader can act on and verify. The mechanism comes before the fix, because a fix you do not understand is a fix you cannot adapt when the situation changes.

The Desk works from primary sources — the specifications, the vendor documentation, and the OWASP, NIST and NCSC guidance that defines behaviour — and will not state a claim that cannot be traced back to one of them. Every article lists the sources it was built from, and every one of those links is checked before publication.

The subjects it returns to are the ones security is most often taught badly: the browser’s security model, injection in all its forms, protocol-level attacks, and the unglamorous defensive work that keeps systems standing long after the exciting part is over. It writes for the reader who wants to understand a thing, not merely be warned about it.

Corrections are welcome and are made in the open. If something here is wrong, say so and it will be fixed.

Guides by The Desk

Articles by The Desk

Security Fundamentals beginner

Forcing password changes makes systems less secure

Forcing users to change passwords every ninety days creates predictable patterns. Discover why NIST and NCSC now recommend against periodic password rotation.

2 min read

Security Fundamentals beginner

Incognito mode makes me invisible online

Does private browsing hide your activity? Learn why incognito mode only clears local history and does not stop ISPs or websites from tracking your identity.

3 min read

Web Security advanced

Security Headers Beyond the Basics

Past the core headers lies a second tier: Permissions-Policy, COOP/COEP, Reporting, and more. Learn what these headers add and when to use them.

1 min read

Web Security advanced

Timing Attacks on Web Applications

Timing attacks infer secrets from how long an app takes to respond. Learn how they leak passwords and usernames, and why constant-time comparison matters.

1 min read

Web Security intermediate

SameSite Cookies, In Depth

The SameSite cookie attribute is a frontline CSRF defense. Learn how Strict, Lax, and None differ, what the Lax-by-default change means, and its limits.

1 min read

Web Security advanced

What Is Cross-Site Script Inclusion (XSSI)?

XSSI abuses the ability to include a script cross-origin to steal data from dynamic script responses. Learn how it works and why anti-framing prefixes stop it.

1 min read

Web Security intermediate

What Is HTTP Parameter Pollution?

HTTP parameter pollution sends duplicate parameters that servers interpret inconsistently. Learn how the ambiguity is abused and how to fix it.

1 min read

Web Security intermediate

Web Authentication with WebAuthn and Passkeys

WebAuthn and passkeys replace passwords with phishing-resistant public-key credentials. Learn how the challenge-response works and why it defeats phishing.

1 min read

Web Security intermediate

Preventing Account Takeover

Account takeover is the goal behind many attacks. Learn the paths attackers use — credential stuffing, phishing, reset abuse — and the layered defenses.

1 min read

Web Security intermediate

What Are Host Header Attacks?

Apps that trust the HTTP Host header can be tricked into poisoning links, resets, and caches. Learn how these attacks work and why it is untrusted input.

1 min read

Web Security intermediate

What Is HSTS?

HTTP Strict Transport Security forces browsers to use HTTPS and refuse to downgrade. Learn how HSTS closes the gap and why preloading is near-permanent.

1 min read

Web Security advanced

What Is LDAP Injection?

LDAP injection manipulates directory queries through unsanitized input, bypassing auth or exposing data. Learn how it works and how to escape LDAP filters.

1 min read

Web Security advanced

What Is NoSQL Injection?

NoSQL databases are not immune to injection. Learn how operator injection and JavaScript evaluation create NoSQL injection, and how to prevent it.

1 min read

Web Security intermediate

What Is Sensitive Data Exposure?

Sensitive data exposure is failing to protect data in transit and at rest. Learn the common causes, why encryption alone is not enough, and how to protect data.

2 min read

Web Security advanced

What Is Prototype Pollution?

Prototype pollution is a JavaScript flaw where attacker input corrupts a base object prototype. Learn how it happens, what it enables, and how to prevent it.

1 min read

Web Security beginner

What Is Security Misconfiguration?

Security misconfiguration is insecure defaults, open settings, and forgotten features. Learn the common cases and how to harden it all by default.

1 min read

Web Security intermediate

What Is a Subdomain Takeover?

A subdomain takeover claims a subdomain that points to a decommissioned service. Learn how dangling DNS records cause it and how to prevent the hijack.

1 min read

Web Security advanced

Cross-Origin Isolation: COOP, COEP, CORP

A family of headers — COOP, COEP, and CORP — hardens the boundaries between origins. Learn what each does and why isolation re-enabled powerful APIs.

1 min read

Web Security advanced

What Are Business Logic Vulnerabilities?

Business logic flaws break the rules of how an app should work, without any classic bug. Learn why scanners miss them and how to think like an abuser.

2 min read

Web Security intermediate

File Upload Vulnerabilities

File uploads let users put data on your server — and attackers put code. Learn the risks of malicious uploads and how to accept files without getting owned.

1 min read

Web Security intermediate

REST API Security

APIs are the backbone of modern apps and a major attack surface. Learn the core REST API controls: authentication, authorization, validation, and rate limits.

1 min read

Web Security intermediate

GraphQL Security Basics

GraphQL’s flexibility creates its own risks: deep queries, introspection, and batching abuse. Learn the common GraphQL pitfalls and how to lock an API down.

1 min read

Web Security intermediate

What Are Mass Assignment Vulnerabilities?

Mass assignment lets attackers set fields they should not by adding them to a request. Learn how auto-binding causes it and why allowlisting fields is the fix.

1 min read

Web Security intermediate

CRLF Injection and HTTP Response Splitting

CRLF injection smuggles carriage-return and line-feed characters into headers to forge new ones. Learn how it enables response splitting and how to prevent it.

1 min read

Web Security advanced

What Is Web Cache Poisoning?

Web cache poisoning stores a malicious response in a shared cache so it is served to many users. Learn how unkeyed inputs cause it and how to cache safely.

2 min read

Web Security beginner

What Is the OWASP Top 10?

The OWASP Top 10 is the industry’s reference list of the most critical web application security risks. Learn what it covers, how to use it, and its limits.

1 min read

Web Security beginner

What Is Subresource Integrity (SRI)?

Subresource Integrity lets the browser verify a third-party script has not been tampered with. Learn how the integrity hash works and where SRI protects you.

1 min read

Web Security advanced

What Is DOM-Based XSS?

DOM-based XSS executes entirely in the browser, never touching the server. Learn its sources and sinks, why it evades server defenses, and how to prevent it.

1 min read

Web Security beginner

Rate Limiting and Brute-Force Protection

Rate limiting caps how often an action can be attempted, blunting brute-force and abuse. Learn where to apply it, its common bypasses, and account defenses.

1 min read

Web Security intermediate

Password Storage Done Right

Storing passwords safely is a solved problem: hash them with a slow, salted algorithm. Learn why bcrypt, scrypt, and Argon2 exist and what never to do.

1 min read

Web Security advanced

OAuth 2.0 Security Basics

OAuth 2.0 delegates access without sharing passwords, but its flows are easy to get wrong. Learn the roles, the safe auth-code flow, and common mistakes.

1 min read

Web Security intermediate

JWT Security: Common Pitfalls

JSON Web Tokens are easy to misuse. Learn the classic JWT pitfalls — the alg:none trap, weak secrets, and no revocation — and how to use them safely.

1 min read

Web Security advanced

What Is Insecure Deserialization?

Insecure deserialization rebuilds untrusted data into live objects, sometimes running code. Learn the risk and why you should not deserialize input.

2 min read

Web Security advanced

What Is HTTP Request Smuggling?

Request smuggling exploits disagreements between servers about where one HTTP request ends. Learn how desync attacks work and why consistent parsing is the fix.

1 min read

Web Security beginner

What Are Open Redirects?

An open redirect uses your trusted domain to send victims to a malicious site. Learn how it powers phishing and how to validate redirect targets.

1 min read

Web Security advanced

What Is Server-Side Template Injection (SSTI)?

SSTI evaluates user input inside a server-side template engine, often causing code execution. Learn how it arises and why input is never a template.

1 min read

Web Security advanced

What Are XML External Entity (XXE) Attacks?

XXE abuses XML parsers that resolve external entities to read files or hit internal systems. Learn how it works and why disabling entities is the fix.

1 min read

Web Security advanced

What Is OS Command Injection?

Command injection runs attacker-supplied OS commands through a vulnerable app. Learn how shell metacharacters cause it and why avoiding the shell fixes it.

1 min read

Web Security intermediate

What Is a Path Traversal Attack?

Path traversal abuses file paths to read files outside the intended folder. Learn how the ../ trick works, what it exposes, and how to prevent it.

1 min read

Web Security intermediate

Broken Access Control, Explained

Broken access control is the top web risk: users doing what they should not. Learn the common patterns, why it is so prevalent, and how to fix it.

2 min read

Web Security beginner

What Is an IDOR Vulnerability?

IDOR lets a user reach another user’s data by changing an ID in a request. Learn why it is so common and why object-level checks are the fix.

1 min read

Web Security advanced

What Is Server-Side Request Forgery (SSRF)?

SSRF makes a server send requests an attacker controls, reaching internal systems. Learn how it works and why cloud metadata makes it so dangerous.

2 min read

Web Security beginner

What Is Clickjacking?

Clickjacking tricks users into clicking something other than what they see, via invisible frames. Learn how the attack works and how to stop it.

1 min read

Web Security intermediate

Session Management Best Practices

Sessions let a stateless web remember who you are — a prime target. Learn secure session IDs, expiry, rotation, and the mistakes that enable hijacking.

1 min read

Web Security beginner

Cookie Security: HttpOnly, Secure, SameSite

Three cookie attributes carry session security: HttpOnly, Secure, and SameSite. Learn what each defends against and how to set them correctly.

1 min read

Web Security advanced

Content Security Policy: A Practical Guide

A Content Security Policy controls which scripts a page may run. Learn how CSP blunts XSS, why nonces beat allowlists, and how to deploy it safely.

1 min read

Web Security intermediate

What Is CORS, and How to Configure It?

CORS lets a server allow specific cross-origin reads of its data. Learn how it relaxes the same-origin policy and the misconfigurations that leak data.

1 min read

Web Security intermediate

What Is Cross-Site Request Forgery (CSRF)?

CSRF tricks a logged-in browser into sending an unwanted request. Learn how the attack works and why SameSite cookies and anti-CSRF tokens stop it.

2 min read

Web Security intermediate

HTTP Security Headers That Matter

A guide to the HTTP security headers that matter now: CSP, HSTS, frame and referrer controls — what each one does, and copy-ready configs for real servers.

3 min read

Security Fundamentals advanced

What Is Perfect Forward Secrecy?

Perfect forward secrecy ensures that stealing a server’s long-term key cannot decrypt past traffic. Learn how ephemeral keys make it work and why TLS needs it.

1 min read

Security Fundamentals intermediate

What Is a Nonce?

A nonce is a number used once to stop replay attacks and guarantee freshness. Learn how nonces work in crypto, CSP, and auth, and why reuse is dangerous.

1 min read

Careers & Practice beginner

Avoiding Burnout in Security

Security is high-stakes, always-on, and adversarial — a recipe for burnout. Learn why the field burns people out and how to build a sustainable career.

2 min read

Security Fundamentals intermediate

What Is Entropy in Security?

Entropy is the unpredictability that keys, tokens, and passwords depend on. Learn why weak randomness breaks cryptography, and PRNGs versus CSPRNGs.

1 min read

Network Security beginner

Ports 80 and 443: HTTP vs HTTPS

Almost all web traffic rides on ports 80 and 443. Learn what each carries, why HTTPS on 443 matters, and how redirects and HSTS enforce encryption.

1 min read

Defense & Hardening advanced

What Is Security Automation and SOAR?

SOAR automates and orchestrates security operations to speed response and cut toil. Learn what it does and where human judgment stays essential.

1 min read

Defense & Hardening beginner

Blameless Post-Incident Reviews

A blameless postmortem turns an incident into lasting improvement instead of finger-pointing. Learn why blamelessness works and how to run one well.

1 min read

Security Fundamentals intermediate

What Is Key Management?

Encryption is only as strong as how you handle the keys. Learn the key lifecycle, why key storage is the hard part, and what HSMs and rotation are for.

1 min read

Network Security intermediate

What Is a Network Tap?

A network tap copies traffic on a link for monitoring without disrupting it. Learn how taps differ from SPAN ports and why they give reliable visibility.

1 min read

Careers & Practice beginner

How to Build a Personal Threat Model

Good security is personal: it depends on who might target you and what you protect. Learn how to build a personal threat model and choose defenses that fit.

1 min read

Network Security intermediate

What Is a Bastion Host?

A bastion host is a hardened gateway that is the single controlled entry point to a private network. Learn how it shrinks exposure and concentrates monitoring.

1 min read

Defense & Hardening intermediate

What Is Deception Technology?

Deception technology plants decoys and traps to catch attackers with almost no false positives. Learn how honeypots, honeytokens, and decoys work together.

1 min read

Careers & Practice beginner

How to Read a CVE and a Security Advisory

Security advisories look dense but follow a pattern. Learn how to read a CVE and advisory quickly, extract what matters, and decide whether you need to act.

1 min read

Security Fundamentals beginner

What Is a Security Baseline?

A security baseline is a documented minimum set of controls a system must meet. Learn why baselines beat ad-hoc hardening and how CIS Benchmarks help.

1 min read

Network Security intermediate

What Is Egress Filtering?

Egress filtering controls what leaves your network, not just what enters. Learn why outbound control catches data theft and C2, and how to apply it.

1 min read

Defense & Hardening intermediate

Securing Privileged Access (PAM)

Privileged accounts are the keys to the kingdom. Learn how Privileged Access Management controls, monitors, and limits the most powerful credentials.

1 min read

Careers & Practice beginner

Soft Skills for Security Professionals

Technical skill gets you in the door; soft skills advance your career. Learn the communication and collaboration skills that make you effective.

1 min read

Security Fundamentals intermediate

What Is Threat Intelligence?

Threat intelligence is evidence-based knowledge about adversaries that informs decisions. Learn its three levels, and how to make it actually useful.

1 min read

Careers & Practice beginner

A Career in Governance, Risk & Compliance

GRC is the less-technical, high-impact side of security. Learn what governance, risk, and compliance work involves, the skills it needs, and why it matters.

1 min read

Security Fundamentals intermediate

What Is an Indicator of Compromise (IOC)?

An indicator of compromise is forensic evidence that a breach may have occurred. Learn the common IOC types, how they are used, and why IOCs alone fall short.

1 min read

Defense & Hardening advanced

What Is Microsegmentation?

Microsegmentation applies fine-grained network policy down to individual workloads. Learn how it goes beyond traditional segmentation and enables zero trust.

1 min read

Network Security advanced

Lateral Movement Across Networks

Once inside, attackers move laterally using the network’s own protocols and trust. Learn the network techniques and the controls that make movement visible.

1 min read

Careers & Practice advanced

A Career in Malware Analysis

Malware analysts dissect malicious code to understand what it does and how to stop it. Learn what the work involves, the skills it demands, and how to begin.

1 min read

Network Security intermediate

Network Traffic Analysis Basics

Network traffic analysis inspects flows and packets to find threats and anomalies. Learn what it reveals, how it catches attacks, and why metadata matters.

1 min read

Security Fundamentals intermediate

What Is Non-Repudiation?

Non-repudiation means an actor cannot credibly deny an action they took. Learn how digital signatures and logging provide it, and why it extends the CIA triad.

1 min read

Defense & Hardening intermediate

Securing Remote Work

Remote work erased the network perimeter. Learn the practical controls — device posture, MFA, zero trust — that secure a distributed workforce.

1 min read

Careers & Practice intermediate

A Career in Digital Forensics

Digital forensics recovers and analyzes evidence from devices and systems. Learn what the field involves, the meticulous mindset it needs, and how to enter it.

1 min read

Defense & Hardening intermediate

Least Privilege in Practice

Least privilege is easy to state and hard to implement. Learn practical patterns — role design, just-in-time access, and access reviews — that make it real.

1 min read

Network Security intermediate

What Is a Rogue Access Point?

A rogue access point is an unauthorized Wi-Fi network used to trick devices into connecting. Learn the evil-twin attack and how to detect rogue APs.

1 min read

Security Fundamentals beginner

Security Through Obscurity: Does It Work?

Security through obscurity relies on secrecy of design as the defense. Learn why it fails as a sole control, and the nuanced role secrecy still plays in depth.

1 min read

Careers & Practice intermediate

A Career in Cloud Security

As everything moves to the cloud, cloud security skills are in high demand. Learn what a cloud security career involves, the skills it needs, and how to start.

1 min read

Network Security intermediate

What Is DHCP Spoofing?

DHCP spoofing plants a rogue DHCP server to feed victims malicious network settings. Learn how it enables man-in-the-middle and how DHCP snooping stops it.

1 min read

Security Fundamentals beginner

What Are Fail-Safe Defaults?

Fail-safe defaults mean a system denies by default and stays secure when something breaks. Learn the principle, fail-closed vs fail-open, and how to apply it.

1 min read

Defense & Hardening intermediate

What Is File Integrity Monitoring?

File integrity monitoring detects unauthorized changes to important files. Learn how FIM works, what it catches, and why baselining and tuning matter.

1 min read

Careers & Practice intermediate

A Career in Application Security

Application security sits between development and security, and demand is high. Learn what an AppSec career involves, the skills it needs, and how to get in.

1 min read

Security Fundamentals beginner

What Is Input Validation?

Input validation checks that data matches what a program expects before using it. Learn allowlist vs blocklist, why it is not a cure-all, and where it belongs.

1 min read

Network Security beginner

What Is NAT, and Does It Provide Security?

NAT lets many devices share one public IP, and is often mistaken for a firewall. Learn what NAT does, the protection it offers, and why it is not security.

1 min read

Defense & Hardening beginner

Network Monitoring Basics

You cannot defend what you cannot see. Learn what network monitoring captures, how it supports detection and response, and why baselining normal is essential.

1 min read

Security Fundamentals advanced

What Is a Buffer Overflow?

A buffer overflow writes more data than a buffer can hold, corrupting memory and enabling code execution. Learn how the classic attack works and its defenses.

1 min read

Network Security advanced

What Is IPsec?

IPsec secures traffic at the network layer, encrypting and authenticating IP packets. Learn its modes and protocols, and where it fits versus TLS.

1 min read

Careers & Practice intermediate

What Is a Purple Team Exercise?

A purple team exercise has attackers and defenders work together to improve detection. Learn how it works and why collaboration beats competition.

1 min read

Defense & Hardening intermediate

Email Security: SPF, DKIM, and DMARC

Three DNS-based standards fight email spoofing: SPF, DKIM, and DMARC. Learn what each does, how they work together, and why they cut impersonation.

1 min read

Defense & Hardening intermediate

What Is Endpoint Hardening?

Endpoints are where users, data, and attackers meet. Learn the highest-impact endpoint hardening steps that shrink attack surface and contain compromise.

1 min read

Security Fundamentals intermediate

What Is a Race Condition?

A race condition is a bug where the timing of events changes the outcome — and attackers can exploit it. Learn the TOCTOU pattern and how to prevent them.

2 min read

Careers & Practice beginner

How to Stay Current in Security

Security moves fast, and staying current is part of the job. Learn a sustainable way to keep up with threats and tools without drowning in the firehose.

1 min read

Network Security intermediate

What Is a Zero Trust Network?

Zero trust networking removes implicit trust from the network, verifying every access. Learn how it replaces the perimeter model and what it takes to adopt.

1 min read

Network Security advanced

What Is Certificate Pinning?

Certificate pinning ties an app to a specific certificate or key, rejecting all others. Learn how it blocks fraudulent certificates and the risk of pinning.

1 min read

Careers & Practice beginner

Ethics and Responsible Behavior in Hacking

Skill without ethics is a liability. Learn the ethical principles that define a real security professional, and why they protect you as much as others.

2 min read

Web Security beginner

SQL Injection, Explained Properly

SQL injection turns user input into database commands. It still breaches systems, and one defense ends it: parameterized queries. Here's how both work.

2 min read

Defense & Hardening beginner

Tabletop Exercises for Security

A tabletop exercise rehearses incident response in a low-stakes discussion. Learn how they expose gaps in your plan and how to run one that actually helps.

1 min read

Security Fundamentals intermediate

What Is Fuzzing?

Fuzzing throws malformed and random input at software to find crashes and bugs. Learn how fuzzers work, why they find flaws humans miss, and where it is used.

1 min read

Network Security advanced

What Is Mutual TLS (mTLS)?

Mutual TLS authenticates both sides of a connection, not just the server. Learn how mTLS works, where it shines, and its real operational cost.

1 min read

Careers & Practice beginner

Building Good Security Note-Taking Habits

In security, your notes are your memory and your evidence. Learn why note-taking is a core professional skill and how to build a system that actually helps.

1 min read

Defense & Hardening beginner

What Is a Security Runbook?

A runbook turns improvisation into a repeatable procedure for responding to a specific incident. Learn what makes a good runbook and why they speed response.

1 min read

Security Fundamentals beginner

What Is a Sandbox?

A sandbox is an isolated environment where untrusted code can run without harming the host. Learn how they contain risk, where they are used, and their limits.

1 min read

Security Fundamentals beginner

What Is Penetration Testing?

A penetration test is an authorized simulated attack that finds exploitable weaknesses before attackers do. Learn the phases, types, and why scope is sacred.

1 min read

Careers & Practice intermediate

What Is the PNPT Certification?

The PNPT is a practical penetration testing certification with a realistic exam and a report. Learn what it tests and how it compares to the OSCP.

1 min read

Defense & Hardening intermediate

Building Alerts That Don't Cry Wolf

Alert fatigue is a top cause of missed breaches. Learn why too many alerts are dangerous and how to build high-signal alerting that analysts actually trust.

1 min read

Network Security intermediate

What Is SSH, and How Do You Harden It?

SSH is the standard for secure remote access — and a constant attack target. Learn how SSH works and the key steps to harden it: keys, no root, and config.

1 min read

Network Security beginner

What Is Banner Grabbing?

Banner grabbing reads the identifying text a service returns to learn its software and version. Learn how it aids recon and why hiding banners is weak defense.

1 min read

Careers & Practice intermediate

GIAC Certifications, Explained

GIAC certifications are respected, specialized, and expensive. Learn what they cover, how they tie to SANS training, and whether they fit your situation.

1 min read

Security Fundamentals beginner

What Is a Security Audit?

A security audit is a structured review of controls against a standard. Learn how they differ from pentests, what they cover, and why evidence matters.

1 min read

Defense & Hardening intermediate

Logging: What to Log and What Not To

Effective logging captures what investigators need without recording secrets. Learn which events to log for security and the sensitive data to keep out of logs.

1 min read

Careers & Practice beginner

A Security Certification Roadmap

With dozens of security certifications, it is easy to waste time and money. Learn how to choose certs by career goal and stage, rather than collecting them.

1 min read

Network Security beginner

What Is Network Enumeration?

Network enumeration is the recon phase of mapping hosts, services, and structure. Learn what attackers gather and why defenders enumerate too.

1 min read

Defense & Hardening advanced

What Is Runtime Self-Protection (RASP)?

RASP builds security into a running application so it can detect and block attacks from inside. Learn how RASP differs from a WAF and its trade-offs.

1 min read

Security Fundamentals beginner

Red, Blue, and Purple Teams

Red teams attack, blue teams defend, and purple teams make them work together. Learn what each does, how they differ from a pentest, and why collaboration wins.

1 min read

Network Security intermediate

What Is a Honeypot?

A honeypot is a decoy system built to attract and study attackers. Learn how honeypots detect intrusions with almost no false positives, and their trade-offs.

1 min read

Careers & Practice intermediate

Common Security Interview Questions

Security interviews test understanding, not memorization. Learn the kinds of questions to expect and why explaining your reasoning matters most.

1 min read

Defense & Hardening intermediate

Threat Modeling for Developers

Developers can threat model without heavy process. Learn a lightweight, practical approach to spotting security flaws in a feature before you write the code.

1 min read

Security Fundamentals beginner

What Is OSINT (Open-Source Intelligence)?

OSINT is intelligence gathered from publicly available sources. Learn what it covers, how attackers and defenders use it, and why your footprint is a target.

1 min read

Security Fundamentals beginner

What Is a Bug Bounty?

A bug bounty program pays researchers to find and report vulnerabilities legally. Learn how programs work, what scope means, and where to start.

1 min read

Careers & Practice beginner

OSINT for Beginners

OSINT is a practical, legal skill you can start today. Learn how to gather open-source intelligence responsibly and where the ethical lines are.

1 min read

Defense & Hardening intermediate

Secure Coding Principles

Secure coding builds defenses into software from the start. Learn the core principles that prevent whole classes of vulnerability, not single bugs.

1 min read

Network Security intermediate

What Is a TCP SYN Flood Attack?

A SYN flood exhausts a server by opening half-finished TCP connections it must hold. Learn how the handshake is abused and why SYN cookies defeat it.

1 min read

Careers & Practice beginner

Free Resources to Learn Hacking

You can go a long way in security without spending a cent. Learn the best free resources — platforms, courses, and references — for legal, hands-on learning.

1 min read

Network Security intermediate

What Is IP Spoofing?

IP spoofing forges the source address of packets to hide their origin or impersonate a host. Learn how it works and why egress filtering helps.

1 min read

Security Fundamentals beginner

What Is Responsible Disclosure?

Responsible disclosure means reporting a vulnerability privately and giving the vendor time to fix it before details go public. Here is how it works.

1 min read

Defense & Hardening intermediate

Supply Chain Security Basics

Supply-chain attacks compromise you through the software you trust. Learn how they work, why they are so effective, and the defenses that reduce the risk.

1 min read

Network Security advanced

What Is BGP Hijacking?

BGP hijacking reroutes internet traffic by announcing false routes on the protocol that connects networks. Learn how it works and why RPKI is the emerging fix.

1 min read

Security Fundamentals intermediate

Understanding CVSS Scores

CVSS turns a vulnerability’s traits into a 0–10 severity score. Learn what the metrics mean, what the number does and does not tell you, and how to use it well.

1 min read

Careers & Practice beginner

Building a Cybersecurity Study Plan

Random tutorials rarely add up to skill. Learn how to build a focused cybersecurity study plan with a clear sequence, hands-on practice, and steady momentum.

1 min read

Defense & Hardening intermediate

What Is a Software Bill of Materials (SBOM)?

An SBOM is a complete inventory of the components in a piece of software. Learn what it contains and why it speeds up incident response and audits.

1 min read

Network Security intermediate

What Is Network Access Control (NAC)?

Network Access Control decides which devices may join a network and what they can reach. Learn how NAC enforces posture and its role in zero trust.

1 min read

Defense & Hardening intermediate

What Is Software Composition Analysis (SCA)?

Most code in an app is third-party dependencies. Learn how SCA finds known vulnerabilities and license issues in those dependencies, and why it is essential.

1 min read

Careers & Practice beginner

What Is a Vulnerability Disclosure Program?

A VDP gives researchers a safe, legal channel to report vulnerabilities. Learn how VDPs differ from bug bounties and why every organization should have one.

1 min read

Security Fundamentals beginner

What Is a CVE?

A CVE is a unique public identifier for a specific security vulnerability. Learn what CVE IDs mean, who assigns them, and how they drive patching.

1 min read

Careers & Practice advanced

Binary Exploitation Basics

Binary exploitation turns memory bugs into control of a program. Learn what pwn involves, the core concepts, and why it is one of the deepest security skills.

1 min read

Network Security intermediate

What Is Port Knocking?

Port knocking hides a service until a secret sequence of connection attempts opens it. Learn how it works, its value as obscurity, and its real limitations.

1 min read

Defense & Hardening intermediate

SAST vs DAST

SAST analyzes source code; DAST tests the running app. Learn how the two application testing approaches differ, what each finds, and why you need both.

1 min read

Security Fundamentals intermediate

What Is a Backdoor?

A backdoor is a hidden way to bypass normal authentication and regain access to a system. Learn the types, how attackers plant them, and why they are dangerous.

1 min read

Network Security intermediate

What Is a Bind Shell?

A bind shell opens a listening port on a compromised host for the attacker to connect to. Learn how it differs from a reverse shell and why firewalls limit it.

1 min read

Defense & Hardening advanced

Securing CI/CD Pipelines

CI/CD pipelines have deep access and are a prime supply-chain target. Learn the key risks to build pipelines and how to secure the path from code to production.

1 min read

Security Fundamentals intermediate

What Is Lateral Movement?

Lateral movement is how attackers spread from their first foothold to their real target. Learn the techniques, why it is a detection point, and how to slow it.

1 min read

Careers & Practice advanced

Reverse Engineering for Beginners

Reverse engineering is understanding how a program works without its source code. Learn what it involves, where it is used in security, and how to start.

1 min read

Careers & Practice intermediate

Cryptography CTF Basics

Crypto CTF challenges test whether you can spot and exploit weak or misused cryptography. Learn the common challenge types and the mindset that solves them.

1 min read

Defense & Hardening intermediate

What Is Identity and Access Management (IAM)?

IAM governs who can access what across systems. Learn its core concepts — identities, authentication, authorization — and why it is central.

1 min read

Security Fundamentals intermediate

What Is Privilege Escalation?

Privilege escalation is how an attacker turns limited access into greater control. Learn the two types, common causes, and how to shut it down.

1 min read

Network Security intermediate

What Is a Reverse Shell?

A reverse shell has a compromised host connect back to the attacker, bypassing inbound firewalls. Learn how it works, why it is favored, and how to detect it.

1 min read

Defense & Hardening beginner

The Cloud Shared Responsibility Model

In the cloud, security is split between provider and customer. Learn the shared responsibility model, who owns what, and where breaches happen.

1 min read

Network Security advanced

What Is VLAN Hopping?

VLAN hopping lets an attacker reach segments they should be isolated from. Learn the switch-spoofing and double-tagging techniques and how to prevent them.

1 min read

Careers & Practice intermediate

Web Exploitation CTF Basics

Web is the most beginner-friendly CTF category and the most job-relevant. Learn the common web challenge types and the skills that solve them.

1 min read

Security Fundamentals intermediate

What Is a Rootkit?

A rootkit is malware built to hide — concealing its presence while keeping privileged access. Learn how they work, why they resist detection, and how to defend.

1 min read

Careers & Practice beginner

How to Approach a CTF Challenge

CTF challenges reward method over luck. Learn a repeatable approach — enumerate, research, experiment, persist — that helps you solve more and learn faster.

1 min read

Defense & Hardening advanced

Kubernetes Security Basics

Kubernetes orchestrates containers at scale and adds a large attack surface. Learn the key security areas — RBAC, network policy, and secrets.

1 min read

Security Fundamentals beginner

What Is a Botnet?

A botnet is a network of compromised devices controlled remotely by an attacker. Learn how botnets are built, what they do, and how they are taken down.

2 min read

Web Security beginner

What Is Cross-Site Scripting (XSS)?

Cross-site scripting lets attackers run their JavaScript in your users' browsers. Learn how XSS works, the three types, and the layered defenses that stop it.

3 min read

Network Security intermediate

What Is a Deauthentication Attack?

A Wi-Fi deauth attack forces devices off a network by forging management frames. Learn how it works, what it enables, and why WPA3 finally protects against it.

1 min read

Defense & Hardening intermediate

Container Security Basics

Containers package apps for portability but add their own risks. Learn the key container security concerns — images, isolation, and secrets.

1 min read

Careers & Practice beginner

TryHackMe vs Hack The Box

TryHackMe and Hack The Box are the two most popular hands-on hacking platforms. Learn how they differ, which suits your level, and why many people use both.

1 min read

Security Fundamentals beginner

What Is Ransomware?

Ransomware encrypts a victim’s data and demands payment to release it. Learn how modern attacks work, why backups matter, and what double extortion means.

1 min read

Network Security beginner

Wi-Fi Security: WEP, WPA, WPA2, WPA3

Wi-Fi security has evolved from broken WEP to modern WPA3. Learn how the protocols differ, why the old ones fail, and what to use to secure a wireless network.

1 min read

Security Fundamentals beginner

What Is Malware? A Working Taxonomy

Malware is a family, not one thing. Learn the working taxonomy — virus, worm, trojan, ransomware, spyware, rootkit — and what actually sets each type apart.

1 min read

Careers & Practice beginner

Networking Fundamentals for Beginners

Security runs on networks, so networking is a prerequisite skill. Learn the core concepts every beginner needs — addresses, ports, protocols, and the models.

1 min read

Defense & Hardening intermediate

What Is Phishing-Resistant MFA?

Not all MFA is equal — most can be phished in real time. Learn what makes MFA phishing-resistant, why origin binding matters, and which methods to prefer.

1 min read

Network Security intermediate

What Is a Web Application Firewall (WAF)?

A WAF filters HTTP traffic to block common web attacks before they reach the app. Learn what a WAF catches, its limits, and why it is a layer, not a fix.

1 min read

Careers & Practice beginner

Learning to Code for Security

You do not need to be a software engineer, but coding multiplies what you can do in security. Learn which languages matter and how much you really need.

1 min read

Network Security intermediate

What Is DNS over HTTPS (DoH)?

DNS over HTTPS encrypts DNS queries so local observers cannot see or tamper with them. Learn what DoH protects, the trade-offs, and how it differs from DNSSEC.

1 min read

Defense & Hardening beginner

Security Awareness Training That Works

Security awareness training aims to make people a stronger link, not a scapegoat. Learn what makes training effective and why blame-based approaches backfire.

1 min read

Security Fundamentals beginner

What Is Social Engineering?

Social engineering attacks the human, not the machine, using trust and urgency to bypass technical controls. Learn its main techniques and real defenses.

2 min read

Network Security intermediate

What Is DNSSEC?

DNSSEC adds cryptographic signatures to DNS so answers can be verified as authentic. Learn what it protects against, what it does not, and why it matters.

1 min read

Careers & Practice beginner

Learning Linux for Security

Linux is everywhere in security, from tooling to targets. Learn why the command line matters, what to focus on, and how to build real Linux fluency.

1 min read

Security Fundamentals beginner

What Is Multi-Factor Authentication?

Multi-factor authentication requires two or more independent proofs of identity. Learn the three factors, why SMS is weakest, and what phishing-resistant means.

1 min read

Defense & Hardening beginner

Password Managers: Why and How

A password manager generates and stores unique strong passwords so you do not reuse them. Learn how they work and why everyone should use one.

1 min read

Network Security intermediate

How DDoS Mitigation Works

Surviving a DDoS attack means absorbing or filtering flood traffic before it overwhelms you. Learn the core techniques and why scale is the main defense.

1 min read

Careers & Practice beginner

Essential Skills for Security Professionals

Beyond tools and certs, a core set of skills underpins every security career. Learn the technical and non-technical skills worth building first.

1 min read

Security Fundamentals beginner

What Is Salting, and Why Passwords Need It

A salt is random data added to each password before hashing. Learn how salts defeat rainbow tables, why every password needs a unique one, and pepper.

1 min read

Defense & Hardening intermediate

What Is Secrets Management?

Secrets management is how you store and control access to passwords, keys, and tokens. Learn why secrets in code are dangerous and how vaults and rotation help.

1 min read

Defense & Hardening intermediate

What Is Application Allowlisting?

Application allowlisting permits only approved programs to run, blocking everything else. Learn how it stops malware and why deny-by-default wins.

1 min read

Network Security beginner

What Is a DDoS Attack?

A DDoS attack overwhelms a target with traffic from many sources to knock it offline. Learn the main types — volumetric, protocol, and application-layer.

1 min read

Security Fundamentals beginner

Encoding vs Encryption vs Hashing

Encoding, encryption, and hashing are constantly confused, yet only one provides security. Learn what each does, when to use it, and why encoding is not one.

1 min read

Careers & Practice beginner

Breaking Into Security From IT and Helpdesk

IT and helpdesk experience is a strong foundation for a security career. Learn how to leverage what you already know and make the transition deliberately.

1 min read

Defense & Hardening advanced

Securing Active Directory

Active Directory is the heart of most enterprise networks, and the ultimate target. Learn the key AD attacks and the tiered defenses that protect it.

1 min read

Security Fundamentals intermediate

What Is a Certificate Authority?

A certificate authority issues the digital certificates that vouch for identities online. Learn what CAs do, how they validate, and why they are load-bearing.

1 min read

Careers & Practice beginner

Breaking Into Security From Development

Developers have a real head start in security, especially application security. Learn how to leverage coding experience to move into a security career.

1 min read

Network Security intermediate

Packet Sniffing and Wireshark Basics

Packet sniffing captures network traffic for analysis. Learn how sniffing works, what Wireshark reveals, and why it matters to attackers and defenders.

1 min read

Defense & Hardening intermediate

What Is Data Loss Prevention (DLP)?

DLP tools detect and block sensitive data from leaving an organization. Learn how DLP works, where it helps, and why it is a control with real limits.

1 min read

Network Security intermediate

What Is an IDS/IPS?

An IDS detects suspicious network activity; an IPS blocks it. Learn how they differ, signature vs anomaly detection, and where they fit in a defense stack.

1 min read

Careers & Practice intermediate

What Does a Security Engineer Do?

A security engineer builds and maintains the systems that keep an organization secure. Learn what the role involves and how it differs from analysis.

1 min read

Security Fundamentals intermediate

What Is Public Key Infrastructure (PKI)?

PKI is the system of keys, certificates, and authorities that binds public keys to real identities. Learn what problem it solves and how the trust chain works.

1 min read

Network Security beginner

Common Ports and Services to Know

A handful of ports carry most network traffic. Learn the common ports and their services, why the mapping matters, and how attackers use it in recon.

1 min read

Security Fundamentals intermediate

What Is a Digital Signature?

A digital signature proves who created a message and that it was not altered. Learn how signatures use hashing and private keys, and what they really prove.

1 min read

Defense & Hardening intermediate

Disaster Recovery Basics

Disaster recovery is the plan for restoring systems after a major disruption. Learn the key metrics RTO and RPO, and why recovery must be tested, not assumed.

1 min read

Careers & Practice beginner

What Does a SOC Analyst Do?

A SOC analyst is the front line of defense, monitoring and responding to threats. Learn what the role involves and why it is a common way in.

1 min read

Defense & Hardening beginner

Backups and the 3-2-1 Rule

Backups are the last line of defense against ransomware and disaster. Learn the 3-2-1 rule, why offline and tested backups matter, and common failures.

1 min read

Security Fundamentals beginner

Hashing vs Encryption

Hashing is a one-way fingerprint; encryption is reversible with a key. Confusing them causes real security bugs. Learn the difference and when to use each.

1 min read

Network Security beginner

What Is Nmap, and How Is It Used?

Nmap is the standard tool for network discovery and port scanning. Learn what it does, its core scan types, and why it is essential for defenders too.

1 min read

Careers & Practice beginner

What Does a Penetration Tester Do?

A penetration tester attacks systems with permission to find weaknesses. Learn what the job actually involves day to day and the skills it needs.

1 min read

Defense & Hardening beginner

What Are CIS Benchmarks?

CIS Benchmarks are free, consensus-built hardening guides for systems and software. Learn what they cover, how they are structured, and how to apply them.

1 min read

Network Security beginner

Port Scanning, Explained

Port scanning probes a host to find which services are listening. Learn how scans work, the common scan types, and why it is step one of recon — and defense.

1 min read

Careers & Practice beginner

Red Team vs Blue Team Careers

Offense and defense are two career tracks with different mindsets and skills. Learn what red-team and blue-team careers involve, and how to choose between them.

1 min read

Security Fundamentals beginner

Symmetric vs Asymmetric Encryption

Symmetric encryption uses one shared key; asymmetric uses a public/private key pair. Learn how each works, their trade-offs, and why real systems use both.

1 min read

Network Security beginner

What Is a Proxy Server?

A proxy server sits between clients and destinations, forwarding requests on their behalf. Learn forward vs reverse proxies and their roles in security.

1 min read

Defense & Hardening intermediate

The Vulnerability Management Lifecycle

Vulnerability management is the ongoing cycle of finding, prioritizing, and fixing weaknesses. Learn the lifecycle and why it is a program, not a scan.

1 min read

Careers & Practice intermediate

How to Write a Good Vulnerability Report

A great finding is worthless if the report is unclear. Learn the structure of an effective vulnerability report and how to make fixes easy for the reader.

1 min read

Security Fundamentals intermediate

What Is Zero Trust?

Zero trust drops the trusted internal network for one rule: never trust, always verify. Learn the core principles, what it is not, and how teams adopt it.

1 min read

Network Security beginner

What Is a VPN, and How Does It Work?

A VPN creates an encrypted tunnel across an untrusted network. Learn what a VPN does and does not protect, and why it is not the privacy cure-all it is sold as.

1 min read

Security Fundamentals intermediate

MITRE ATT&CK, Explained

MITRE ATT&CK is a free, curated knowledge base of real attacker tactics and techniques. Learn how it is structured and how defenders use it to measure coverage.

1 min read

Defense & Hardening beginner

What Is Patch Management?

Patch management is the process of keeping software updated against known vulnerabilities. Learn why it is harder than it sounds and how to prioritize patches.

1 min read

Careers & Practice beginner

How to Build a Security Portfolio

A portfolio proves what a resume only claims. Learn what to put in a security portfolio — writeups, projects, contributions — to stand out to employers.

1 min read

Careers & Practice intermediate

Bug Bounty: How to Get Started

Bug bounties let you hack real targets legally and get paid. Learn how to begin, pick a program, choose a focus, and write reports that get rewarded.

1 min read

Security Fundamentals intermediate

What Is the Cyber Kill Chain?

The Cyber Kill Chain models an intrusion as seven stages, from reconnaissance to actions on objectives. Learn how defenders use them to disrupt attacks.

1 min read

Network Security intermediate

What Is Network Segmentation?

Network segmentation divides a network into zones so a breach cannot spread freely. Learn how it limits lateral movement and how microsegmentation extends it.

1 min read

Web Security beginner

What Is the Same-Origin Policy?

The same-origin policy is the browser rule that keeps one website from reading another's data. See what an origin is, what SOP blocks, and how CORS relaxes it.

3 min read

Defense & Hardening intermediate

Windows Hardening: A Baseline

Hardening Windows means tightening accounts, services, and policies against common attacks. Learn the key steps for a Windows security baseline.

1 min read

Careers & Practice advanced

CISSP: Is It Worth It?

The CISSP is a senior, management-oriented security certification with an experience requirement. Learn what it covers, who it is for, and when it pays off.

1 min read

Defense & Hardening intermediate

Linux Hardening: A Baseline

Hardening a Linux system means reducing its attack surface and tightening its defaults. Learn the highest-impact steps for a solid Linux security baseline.

1 min read

Network Security intermediate

Stateful vs Stateless Firewalls

Stateless firewalls judge each packet alone; stateful ones track connections. Learn how they differ, their trade-offs, and why stateful became the default.

1 min read

Security Fundamentals beginner

Vulnerability, Exploit, and Payload

Vulnerability, exploit, and payload are three different things people call "a hack." Learn what each is, how they chain, and why the distinction matters.

1 min read

Careers & Practice intermediate

What Is the CEH Certification?

The CEH is a broad ethical hacking certification with mixed reputation. Learn what it covers, how it compares to hands-on certs, and whether it fits your goals.

1 min read

Network Security beginner

What Is a Firewall?

A firewall filters network traffic against rules, allowing or blocking it. Learn the types of firewall, what they can and cannot do, and where they fit.

1 min read

Defense & Hardening advanced

What Is Threat Hunting?

Threat hunting proactively searches for attackers who evaded detection, rather than waiting for alerts. Learn how hunts are driven by hypotheses.

1 min read

Security Fundamentals beginner

What Is Risk in Security?

Security risk is the chance a threat exploits a vulnerability and the harm if it does. Learn the risk equation, how to rank risks, and four ways to treat them.

2 min read

Security Fundamentals beginner

Authentication vs Authorization

Authentication proves who you are; authorization decides what you may do. Learn the difference, why apps confuse them, and how each one fails in practice.

1 min read

Network Security intermediate

What Are Man-in-the-Middle Attacks?

A man-in-the-middle attacker sits between two parties, reading or altering traffic. Learn the common techniques and why end-to-end encryption defeats them.

1 min read

Careers & Practice beginner

CompTIA Security+ Explained

Security+ is a popular entry-level certification covering broad security fundamentals. Learn what it covers, who it suits, and where it fits in a career.

1 min read

Defense & Hardening intermediate

What Is Endpoint Detection and Response (EDR)?

EDR watches endpoints for malicious behavior and enables rapid response. Learn how EDR differs from antivirus and why behavior beats signatures.

1 min read

Network Security intermediate

What Is ARP Spoofing?

ARP spoofing lets an attacker on your local network intercept traffic by forging address mappings. Learn how it enables man-in-the-middle and how to detect it.

1 min read

Careers & Practice intermediate

What Is the OSCP Certification?

The OSCP is a hands-on penetration testing certification with a punishing 24-hour exam. Learn what it proves, who it is for, and how to prepare for it.

1 min read

Security Fundamentals beginner

The Principle of Least Privilege, Explained

Least privilege means giving every user, process, and service only the access it needs and no more. Learn why it limits blast radius and how to apply it.

1 min read

Defense & Hardening advanced

Writing Effective Detection Rules

A good detection rule catches real attacks without drowning analysts in noise. Learn the qualities of effective rules and how to balance coverage and noise.

1 min read

Defense & Hardening advanced

What Is Detection Engineering?

Detection engineering treats detections as an engineered product: designed, tested, and maintained. Learn how it works and why it beats collecting alert rules.

1 min read

Network Security intermediate

DNS Spoofing and Cache Poisoning

DNS spoofing feeds a resolver forged answers so users are sent to malicious servers. Learn how cache poisoning works and why DNSSEC and encryption help.

1 min read

Careers & Practice intermediate

How to Set Up a Home Hacking Lab

A home lab gives you systems you fully own to attack and defend. Learn how to build one with virtual machines, what to include, and how to keep it isolated.

1 min read

Security Fundamentals beginner

What Is an Attack Surface?

An attack surface is every point where an attacker can try to enter or extract data from a system. Learn how to map yours and shrink it deliberately.

1 min read

Security Fundamentals beginner

What Is Defense in Depth?

Defense in depth means layering independent security controls so that one failure is not a breach. Learn where the idea comes from and how to apply it well.

2 min read

Network Security beginner

What Is DNS, and How Is It Attacked?

DNS turns names into addresses and underpins the whole internet — which makes it a rich target. Learn how DNS works and the main ways it is attacked.

1 min read

Defense & Hardening intermediate

How to Build an Incident Response Plan

An incident response plan is what makes a breach survivable. Learn what a good IR plan contains, who it names, and why rehearsing it beats writing it.

1 min read

Careers & Practice beginner

The Best Platforms to Practice Hacking Legally

You can build real hacking skills without breaking any laws. Learn the best platforms for legal, hands-on practice and how to choose one for your level.

1 min read

Security Fundamentals beginner

What Is the CIA Triad?

The CIA triad names the three goals of every security control: confidentiality, integrity, and availability. Learn what each means and how they trade off.

1 min read

Defense & Hardening intermediate

Incident Response: The Six Phases

A structured incident response process turns a crisis into a repeatable procedure. Learn the six phases, from preparation to lessons learned.

1 min read

Network Security advanced

The TLS Handshake, Step by Step

The TLS handshake sets up a secure channel before any data flows. Learn what happens in each step, how keys are agreed, and how TLS 1.3 made it faster.

1 min read

Careers & Practice beginner

What Is a Capture the Flag (CTF)?

CTFs are legal hacking competitions where you solve security challenges to find flags. Learn the formats, what they teach, and why they are great practice.

1 min read

Careers & Practice beginner

The Legal Lines of Hacking

The difference between security research and a crime is authorization. Learn the legal principles every hacker must know to stay on the right side.

1 min read

Network Security intermediate

How TLS Works

TLS is the protocol that secures almost all internet traffic. Learn what it provides — encryption, integrity, authentication — and how it fits together.

1 min read

Security Fundamentals beginner

What Is Threat Modeling?

Threat modeling is a structured way to find what can go wrong before it does. Learn its four core questions, the STRIDE framework, and how to run one.

2 min read

Defense & Hardening beginner

What Is a Security Operations Center (SOC)?

A SOC is the team and tooling that monitors, detects, and responds to threats. Learn what a SOC does, how it is structured, and the challenges it faces.

1 min read

Network Security beginner

What Is the OSI Model?

The OSI model breaks networking into seven layers, a shared language for describing where things happen. Learn the layers and how they map to real attacks.

1 min read

Defense & Hardening beginner

Log Management for Security

Logs are the record you rely on during an incident. Learn what makes logs useful for security, how to centralize and protect them, and how long to keep them.

1 min read

Careers & Practice beginner

What Is Ethical Hacking?

Ethical hacking uses attacker skills legally, to find and fix weaknesses before criminals do. Learn what makes hacking ethical, legal, and defensible.

1 min read

Careers & Practice beginner

How to Start a Career in Cybersecurity

There is no single path into security, but there is a sensible starting sequence. Learn the foundations to build and how to practice legally.

1 min read

Network Security beginner

How TCP/IP Works: A Security View

The TCP/IP model is where many network attacks live. Learn the four layers, what each adds, and why understanding them is the basis of network security.

1 min read

Defense & Hardening intermediate

What Is SIEM?

A SIEM collects and correlates logs from across an environment to detect and investigate threats. Learn what it does and why tuning is everything.

1 min read