Tech Skills

Cybersecurity

Ethical hacking, penetration testing, network security, CTFs and defensive security

11,112
lessons
Skills in this topic
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Security Basics
beginner
Fix OWASP top 10 vulnerabilities
AI Security
intermediate
Identify and patch prompt injection vulnerabilities
Network Security
intermediate
Configure a firewall with proper inbound/outbound rules
Ethical Hacking & Pen Testing
intermediate
Conduct a full pen test with Kali Linux
Cloud Security
intermediate
Implement IAM least-privilege policies on AWS/GCP
Incident Response
intermediate
Build an incident response playbook
Security Compliance
intermediate
Map controls for SOC 2 Type II compliance
Defensive AI
advanced
Build an AI-powered log anomaly detector
All Reads (4,209) Articles (2946)Blog Posts (823)Tutorials (296)Research Papers (7)News (137)
Authentication vs Authorization in Cloud Security: Understanding the Difference 🔥
Dev.to · Ria saraswat 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Authentication vs Authorization in Cloud Security: Understanding the Difference 🔥
When we use applications like Gmail, Netflix, or online banking, we rarely think about the security...
Introducing Siyarix v1.0.0 — An Open-Source AI-Powered Cybersecurity Orchestration Framework
Dev.to · MD MUFTHAKHERUL ISLAM MIRAZ 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Introducing Siyarix v1.0.0 — An Open-Source AI-Powered Cybersecurity Orchestration Framework
Today I'm excited to announce the first stable release of Siyarix (v1.0.0)! Siyarix is an...
Detecting Supply-Chain Malware Without Running the Code
Dev.to · Pavel Espitia 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Detecting Supply-Chain Malware Without Running the Code
After I got targeted by a fake-job-interview repo designed to steal my keys, I built a scanner that...
Stop Pasting Your JWT Tokens Into Random Websites
Dev.to · bore.ddev 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Stop Pasting Your JWT Tokens Into Random Websites
I built a 21-tool developer toolkit that runs entirely in your browser. No servers. No sign-ups. No...
Browser Security Model: The Defensive Walls Every Hacker Knows (And Every Developer Should Too)
Dev.to · Arashad Dodhiya 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Browser Security Model: The Defensive Walls Every Hacker Knows (And Every Developer Should Too)
"To defend a system, you must first think like the attacker." I'll tell you this: the browser is...
Why I'm Building a Decentralized Anti-Cheat Instead of Another Plugin
Dev.to · Ahad pro Gamer 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Why I'm Building a Decentralized Anti-Cheat Instead of Another Plugin
When most people think about anti-cheat, they think about kernel drivers, signature scanning, or...
5G Subscriber Privacy: How SUCI Concealment Fights IMSI-Catchers
Dev.to · Haven Messenger 🔐 Cybersecurity ⚡ AI Lesson 4d ago
5G Subscriber Privacy: How SUCI Concealment Fights IMSI-Catchers
For more than two decades, when your phone introduced itself to a cell tower it could be made to...
Security triage shouldn't happen in another browser tab.
Dev.to · Renato Marinho 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Security triage shouldn't happen in another browser tab.
Stop context-switching between security dashboards and your IDE. Learn how using an MCP server for Contrast Security can transform vulnerability triage from a m
PeopleSoft Zero-Day: Why the 2-Week Gap Is the Real Risk
Dev.to · Newzlet 🔐 Cybersecurity ⚡ AI Lesson 4d ago
PeopleSoft Zero-Day: Why the 2-Week Gap Is the Real Risk
What Happened: ShinyHunters Found a Door Oracle Left Open ShinyHunters, one of the most...
Are Microsoft Signed Packages Safe? 73 Were Not
Dev.to · Newzlet 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Are Microsoft Signed Packages Safe? 73 Were Not
What Actually Happened: 73 Signed Packages, One Nasty Surprise Late last week, 73 open...
Hunting Digital Chameleons: How We Defeated Botnets in Laravel v2.4.0
Dev.to · Oleksii Antoniuk 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Hunting Digital Chameleons: How We Defeated Botnets in Laravel v2.4.0
In the world of web traffic, there’s a simple rule: if it looks like a regular user, walks like a...
The Internet's Biggest Lie: Your Password Is Never Actually Verified
Dev.to · Daniel Isaac E 🔐 Cybersecurity ⚡ AI Lesson 4d ago
The Internet's Biggest Lie: Your Password Is Never Actually Verified
What if I told you that the password you type during login is never actually compared with the one...
Applying Checkov SAST to Detect Security Issues in Terraform Infrastructure as Code
Dev.to · Abel Fernando PACOMPIA ORTIZ 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Applying Checkov SAST to Detect Security Issues in Terraform Infrastructure as Code
Introduction Security issues in cloud infrastructure often start as small configuration...
Certifying something on-chain without revealing it: privacy attestation on Midnight
Dev.to · Cory Dabrowski 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Certifying something on-chain without revealing it: privacy attestation on Midnight
I built Grid Audit, a tool that reviews Midnight code and then lets you certify that review on-chain....
Malware on Your Machine: A Developer's Complete Incident Response Guide
Dev.to · Red Masil 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Malware on Your Machine: A Developer's Complete Incident Response Guide
🛡️ Your Computer Got Infected — Now What? A Developer's Survival Guide to Malware...
Sandboxing Reality: How to Spoof iPhone Locations for Advanced Penetration Testing
Dev.to · v. Splicer 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Sandboxing Reality: How to Spoof iPhone Locations for Advanced Penetration Testing
Listen up. If you’re still playing by the rules Apple wrote for you, you aren’t testing security....
Your cloud keys should not exist
Dev.to · b0gy 🔐 Cybersecurity ⚡ AI Lesson 4d ago
Your cloud keys should not exist
Most cloud platforms that need access to your infrastructure start with the same onboarding step:...
BannerGrapV2 — The Open-Source Network Recon Tool Built in Go That Security Professionals Actually Need
Dev.to · MrEchoFi 🔐 Cybersecurity ⚡ AI Lesson 4d ago
BannerGrapV2 — The Open-Source Network Recon Tool Built in Go That Security Professionals Actually Need
BannerGrapV2 is a blazing-fast, multi-protocol banner grabbing and vulnerability discovery tool written in Go. Real-world commands for pentesters, red teamers,
Simon Willison's Blog 🔐 Cybersecurity ⚡ AI Lesson 5d ago
Incident Report: CVE-2026-LGTM
Incident Report: CVE-2026-LGTM Spectacular hypothetical incident report by Andrew Nesbitt. Day 2, 16:00 UTC --- Two AI review agents from competing vendors, bot
# Stop Uploading Sensitive Data to Online Tools: Use Browser-Based Developer Utilities Instead
Dev.to · ToolMight 🔐 Cybersecurity ⚡ AI Lesson 5d ago
# Stop Uploading Sensitive Data to Online Tools: Use Browser-Based Developer Utilities Instead
As developers, we often copy and paste sensitive data into online tools without thinking twice. JWT...
How AegisLink's handshake survives a quantum computer (X3DH + ML-KEM-768)
Dev.to · gabinotech22-cmyk 🔐 Cybersecurity ⚡ AI Lesson 5d ago
How AegisLink's handshake survives a quantum computer (X3DH + ML-KEM-768)
In my first post in this series I said the next one would go deep on the handshake. This is it. If...
Cal Water Handala Attack: OT Containment Analysis & Attacker Motivation
Dev.to · Satyam Rastogi 🔐 Cybersecurity ⚡ AI Lesson 5d ago
Cal Water Handala Attack: OT Containment Analysis & Attacker Motivation
Handala's Cal Water intrusion demonstrates classic attacker posturing: threat inflation to maximize pressure during extortion. Forensic analysis revea
Reverse Engineering a Windows Keylogger with IDA Pro: Assembly-Level Deep Dive
Dev.to · Khalif AL Mahmud 🔐 Cybersecurity ⚡ AI Lesson 5d ago
Reverse Engineering a Windows Keylogger with IDA Pro: Assembly-Level Deep Dive
When I first loaded msdsrv.exe into IDA Pro, I had no idea what I was dealing with. No strings, no...
Real-World CVE HTTP Request Smuggling Apache mod_proxy Example
Dev.to · Stefan 🔐 Cybersecurity ⚡ AI Lesson 5d ago
Real-World CVE HTTP Request Smuggling Apache mod_proxy Example
A reproducible walkthrough of CVE-2022-26377, a request smuggling desync in Apache mod_proxy_ajp, plus the upstream patch and config hardening that close it.
78% False Negatives: Your AI Security Scanner Is Gaslighting You
Dev.to · techpotions 🔐 Cybersecurity ⚡ AI Lesson 5d ago
78% False Negatives: Your AI Security Scanner Is Gaslighting You
A 78% false negative rate means automated AI scanners are missing real vulnerabilities. Understand why these tools fail and how to build a defense-in-depth stra
Last month I saw something I haven’t seen in 18 years of dark web and underground monitoring.
Dev.to · Adrian Alexandru Stinga 🔐 Cybersecurity ⚡ AI Lesson 5d ago
Last month I saw something I haven’t seen in 18 years of dark web and underground monitoring.
The underground is changing faster than the security industry is adapting. Here’s what nearly two...
Cybersecurity Roadmap
Dev.to · Ajitesh 🔐 Cybersecurity ⚡ AI Lesson 5d ago
Cybersecurity Roadmap
Introduction: Cybersecurity is one of the most in-demand fields on the planet - and also one of the...
MCP Trust Pack: a security layer for MCP tool calls
Dev.to · Teller 🔐 Cybersecurity ⚡ AI Lesson 5d ago
MCP Trust Pack: a security layer for MCP tool calls
MCP Trust Pack: a security layer for MCP tool calls MCP makes it easy for agents to call...
I Built a JWT Playground That Re-signs Tokens With Real HMAC-SHA256
Dev.to · Devanshu Biswas 🔐 Cybersecurity ⚡ AI Lesson 5d ago
I Built a JWT Playground That Re-signs Tokens With Real HMAC-SHA256
Most JWT explainers cheat. They show you header.payload.signature, point at the third part, and say...
What actually visits a self-hosted website in 2026? Humans, AI crawlers, and 6,400 automated attacks
Dev.to · Tommy 🔐 Cybersecurity ⚡ AI Lesson 5d ago
What actually visits a self-hosted website in 2026? Humans, AI crawlers, and 6,400 automated attacks
I run a small self-hosted website on a Raspberry Pi 4B at home. A few weeks ago I started wondering:...
Protecting Developers Means Protecting Their Secrets
Dev.to · Dwayne McDaniel 🔐 Cybersecurity ⚡ AI Lesson 6d ago
Protecting Developers Means Protecting Their Secrets
When most people think of "Enterprise Security," they immediately think of hardened data centers,...
Your Baby Monitor's Biggest Security Flaw Isn't Hackers. It's the Company That Built It.
Dev.to · Spicy 🔐 Cybersecurity ⚡ AI Lesson 6d ago
Your Baby Monitor's Biggest Security Flaw Isn't Hackers. It's the Company That Built It.
In May 2026, a French ethical hacker named Sammy Azdoufal bought a baby monitor off Amazon and spent...
Demystifying Zero-Knowledge Proofs: Constructing a ZK-SNARK Verifier from First Principles
Dev.to · Ebendttl 🔐 Cybersecurity ⚡ AI Lesson 6d ago
Demystifying Zero-Knowledge Proofs: Constructing a ZK-SNARK Verifier from First Principles
A mathematical deep-dive into Rank-1 Constraint Systems, Quadratic Arithmetic Programs, and implementing a cryptographic SNARK verifier in TypeScript.
Hello DEV! I'm Plugecon — security developer
Dev.to · Plugecon 🔐 Cybersecurity ⚡ AI Lesson 6d ago
Hello DEV! I'm Plugecon — security developer
Hey DEV community! I'm Plugecon, a security-focused developer working with C/C++, Python, PHP and...
Implementing Chat End-to-End Encryption (E2EE): A Technical Guide to X3DH and Double Ratchet
Dev.to · Nexconn 🔐 Cybersecurity ⚡ AI Lesson 6d ago
Implementing Chat End-to-End Encryption (E2EE): A Technical Guide to X3DH and Double Ratchet
Claims of "security" are everywhere, but very few chat APIs actually walk the walk. Most offerings...
The Security Bug Every Node.js Developer Ships to Production
Dev.to · Lolo 🔐 Cybersecurity ⚡ AI Lesson 6d ago
The Security Bug Every Node.js Developer Ships to Production
Last year I was doing a code review for a startup. Everything looked fine on the surface, clean code,...
Secrets sprawl: how we cleaned up 412 leaked tokens and stopped the latency bleed
Dev.to · isabelle dubuis 🔐 Cybersecurity ⚡ AI Lesson 6d ago
Secrets sprawl: how we cleaned up 412 leaked tokens and stopped the latency bleed
When a CI pipeline failed at 02:13 AM on March 3, we discovered that 412 distinct API tokens had been...
Before You Hack Anything — How Penetration Testers Define Scope and Rules of Engagement
Dev.to · Khalif AL Mahmud 🔐 Cybersecurity ⚡ AI Lesson 6d ago
Before You Hack Anything — How Penetration Testers Define Scope and Rules of Engagement
Most people think penetration testing starts with running tools — Nmap, Metasploit, Burp Suite. But...
Monorepo Dependency Security — Vulnerability Scanning Across Packages
Dev.to · Vulert 🔐 Cybersecurity ⚡ AI Lesson 6d ago
Monorepo Dependency Security — Vulnerability Scanning Across Packages
A monorepo can look like one repository, but security teams should treat it as many applications...
Should Your App Adopt Passkeys?
Dev.to · Developer Service 🔐 Cybersecurity ⚡ AI Lesson 6d ago
Should Your App Adopt Passkeys?
Someone on your leadership team asked a reasonable question: should we adopt passkeys? You searched...
How I Used Wireshark to Dissect a Real TCP Connection — From Handshake to Teardown
Dev.to · Khalif AL Mahmud 🔐 Cybersecurity ⚡ AI Lesson 6d ago
How I Used Wireshark to Dissect a Real TCP Connection — From Handshake to Teardown
Most people who study networking learn TCP from diagrams and textbooks. But there is a real...
N Green Checks Can Be One Bit: Counting Independence You Can Actually Check
Dev.to · Colin Easton 🔐 Cybersecurity ⚡ AI Lesson 6d ago
N Green Checks Can Be One Bit: Counting Independence You Can Actually Check
There's a move almost every trust system makes, and it's quietly broken. You have a thing you want...
How I built an end-to-end encrypted pastebin (and why the server can’t read your text)
Dev.to · slavas-dev 🔐 Cybersecurity ⚡ AI Lesson 6d ago
How I built an end-to-end encrypted pastebin (and why the server can’t read your text)
got annoyed that pastebin and similar sites log everything and keep your text forever, so i built one...
55,000 fake signups in one night: a bot-detection post-mortem
Dev.to · Jaime trejo 🔐 Cybersecurity ⚡ AI Lesson 6d ago
55,000 fake signups in one night: a bot-detection post-mortem
We sell bot detection. Last night I opened our database and found 555 pages of fake signups. This is...
Tata Electronics Breach: Supply Chain RCE & Data Exfiltration TTPs
Dev.to · Satyam Rastogi 🔐 Cybersecurity ⚡ AI Lesson 1w ago
Tata Electronics Breach: Supply Chain RCE & Data Exfiltration TTPs
Tata Electronics confirmed cyberattack targeting IT infrastructure with confirmed data exfiltration. Analysis of attack surface, lateral movement chai
Your Fuzzer Is Only as Smart as Its Oracle
Dev.to · Takafumi Endo 🔐 Cybersecurity ⚡ AI Lesson 1w ago
Your Fuzzer Is Only as Smart as Its Oracle
A migration passed every check — then I saw the path it took: DROP TABLE; CREATE TABLE. Randomness doesn't find bugs, oracles do. What AI made cheap in dev-tool
WordPress Site Hacked? Here's How to Recover It Fast
Dev.to · Amanur Rahman 🔐 Cybersecurity ⚡ AI Lesson 1w ago
WordPress Site Hacked? Here's How to Recover It Fast
Discovering your WordPress site has been hacked is one of the worst feelings for any website owner....
Essential Ransomware Prevention for Small Businesses: A Comprehensive Guide by Test WS
Dev.to · RV 🔐 Cybersecurity ⚡ AI Lesson 1w ago
Essential Ransomware Prevention for Small Businesses: A Comprehensive Guide by Test WS
--- title: "Essential Ransomware Prevention for Small Businesses: A Comprehensive...