Tech Skills

Cybersecurity

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

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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 (11,080) Articles (5495)Blog Posts (4303)Tutorials (407)Research Papers (34)News (841)
Math.random() Is Not Random Enough. I Found It Building API Keys in a 57K-Star Repo.
Dev.to · Ofri Peretz 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Math.random() Is Not Random Enough. I Found It Building API Keys in a 57K-Star Repo.
Math.random() is a PRNG, not a CSPRNG. An attacker who observes a few samples can predict every future output. I found this exact pattern generating production
ISO 27001 Annex A and Email Security: A Simple Gap Analysis Guide
Dev.to · Regő Botond Ronyecz 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
ISO 27001 Annex A and Email Security: A Simple Gap Analysis Guide
Your ISMS is certified. Your Statement of Applicability covers the controls. Your auditor arrives and...
NIS2 Compliance for Small Businesses: The Ultimate 2026 Checklist
Dev.to · Regő Botond Ronyecz 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
NIS2 Compliance for Small Businesses: The Ultimate 2026 Checklist
NIS2 enforcement started in October 2024. There is no grace period. There is no "we're working on it"...
I open-sourced a Malware Families Catalog built on EMBER 2018
Dev.to · jordanricky1604-ship-it 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
I open-sourced a Malware Families Catalog built on EMBER 2018
What it is I just released an open-source dataset that maps EMBER 2018 malware family...
Security news weekly round-up - 29th May 2026
Dev.to · Habdul Hazeez 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Security news weekly round-up - 29th May 2026
Learn about the top cybersecurity news between May 22, 2026, and May 29, 2026. Read now and increase your cybersecurity knowledge.
The Zero-Day Lie
Dev.to · Security Cyber 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
The Zero-Day Lie
The word zero day gets thrown around in cybersecurity like confetti. Every other week there is a new...
Chrome 148 Update Patches 151 Vulnerabilities: What Security Teams Need to Know
Dev.to · Security Cyber 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Chrome 148 Update Patches 151 Vulnerabilities: What Security Teams Need to Know
Chrome 148 Update Patches 151 Vulnerabilities Here is what security teams need to know...
Through the Looking Glass of Logs: Karachi Police, DuckDuckGo, and IPv6 Magic
Dev.to · Oleksii Antoniuk 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Through the Looking Glass of Logs: Karachi Police, DuckDuckGo, and IPv6 Magic
Remember when I said reality turned out to be harsher? When you open the logs of a custom-built...
Brisbane Accounting Firm Kennedy McLaughlin Confirms Cyber Incident Following Qilin Ransomware Claim
Dev.to · BeyondMachines 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Brisbane Accounting Firm Kennedy McLaughlin Confirms Cyber Incident Following Qilin Ransomware Claim
Kennedy McLaughlin & Associates, an Australian accounting firm, confirmed a data breach after the Qilin ransomware group published stolen client financial recor
Gogs Zero-Day Exposes Servers to Remote Code Execution: What Security Teams Need to Know
Dev.to · Security Cyber 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Gogs Zero-Day Exposes Servers to Remote Code Execution: What Security Teams Need to Know
Gogs Zero-Day Exposes Servers to Remote Code Execution This is worth understanding,...
Your JWT decoder might be leaking your tokens. Here's how to check.
Dev.to · engr anees 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Your JWT decoder might be leaking your tokens. Here's how to check.
Most developers paste production JWTs into online decoders without thinking. Here's a 10-second...
ShadowLab: Building a Python C2 Prototype for Security Labs (V1.3)
Dev.to · Mustafa Salih Berk 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
ShadowLab: Building a Python C2 Prototype for Security Labs (V1.3)
I built ShadowLab: A modular, Python-based C2 framework designed for security research and offensive...
Patch Tuesday, May 2026 Edition: What Security Teams Need to Know
Dev.to · Security Cyber 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Patch Tuesday, May 2026 Edition: What Security Teams Need to Know
Patch Tuesday, May 2026 Edition Artificial intelligence platforms may be just as...
Lawmakers Demand Answers as CISA Tries to Contain Data Leak: What Security Teams Need to Know
Dev.to · Security Cyber 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Lawmakers Demand Answers as CISA Tries to Contain Data Leak: What Security Teams Need to Know
Lawmakers Demand Answers as CISA Tries to Contain Data Leak Lawmakers in both houses of...
Cybersecurity Weekly Series #12: Are You Liable If a Client Gets Hacked?
Dev.to · Cyber Safety Zone 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Cybersecurity Weekly Series #12: Are You Liable If a Client Gets Hacked?
Many freelancers believe cybersecurity is only the client’s responsibility. That’s a dangerous...
ThreatsDay Bulletin: Claude Security Plugin, Azure Priv-Esc, Kali365 MFA Bypass, FIFA Scams +15 More: What Security Teams Need to Know
Dev.to · Security Cyber 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
ThreatsDay Bulletin: Claude Security Plugin, Azure Priv-Esc, Kali365 MFA Bypass, FIFA Scams +15 More: What Security Teams Need to Know
ThreatsDay Bulletin: Claude Security Plugin, Azure Priv-Esc, Kali365 MFA Bypass, FIFA Scams...
Why Traditional Website Malware Scanners Miss SEO Spam
Dev.to · Aamir Sahil 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Why Traditional Website Malware Scanners Miss SEO Spam
Most website owners believe their site is clean because their hosting provider, WordPress security...
Stop Overpaying for Cloud Networking: Build a Single Egress IP over Site-to-Site VPN
Dev.to · Sulaiman Olubiyi 🔐 Cybersecurity 1mo ago
Stop Overpaying for Cloud Networking: Build a Single Egress IP over Site-to-Site VPN
Cloud-native doesn’t always mean cloud-managed. Managed gateways promise a “set-and-forget”...
Threat Actors Exploit Critical FortiClient EMS Flaw to Deploy Credential Stealer: What Security Teams Need to Know
Dev.to · Security Cyber 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Threat Actors Exploit Critical FortiClient EMS Flaw to Deploy Credential Stealer: What Security Teams Need to Know
Threat Actors Exploit Critical FortiClient EMS Flaw to Deploy Credential Stealer Threat...
Critical Gogs RCE Vulnerability Lets Any Authenticated User Execute Arbitrary Code: What Security Teams Need to Know
Dev.to · Security Cyber 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Critical Gogs RCE Vulnerability Lets Any Authenticated User Execute Arbitrary Code: What Security Teams Need to Know
Critical Gogs RCE Vulnerability Lets Any Authenticated User Execute Arbitrary Code A...
Secure Remote Access in 2026: VPNs, ZTNA, Bastion Hosts, Privileged Access Gateways, and the Identity-Based Alternative
Dev.to · Matt Keib, Tech Ed 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Secure Remote Access in 2026: VPNs, ZTNA, Bastion Hosts, Privileged Access Gateways, and the Identity-Based Alternative
Count the systems controlling who can access your production infrastructure. In most environments,...
Malicious npm Package Targeted Claude's /mnt/user-data Directory — Here's What Agentic Pipelines Are Missing
Dev.to · Cor E 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Malicious npm Package Targeted Claude's /mnt/user-data Directory — Here's What Agentic Pipelines Are Missing
A malicious npm package named mouse5212-super-formatter showed up on the npm registry last month with...
Secure Your Microservices: Meet Halimun, the High-Performance Encrypted Proxy
Dev.to · Muhammad Ikhwan Fathulloh 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Secure Your Microservices: Meet Halimun, the High-Performance Encrypted Proxy
Meet Halimun Proxy a high-performance, ultra-low latency proxy tunnel system built from the ground...
Why Employee Offboarding Is Your Biggest Security Risk
Dev.to · Gal Shalom 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Why Employee Offboarding Is Your Biggest Security Risk
Most SMBs discover offboarding gaps only after something goes wrong. Here's why ex-employee access is your biggest security blind spot — and how to fix it.
Two Retailers, One Attack: What Really Decides Who Survives a Breach
Dev.to · Stanley A. 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Two Retailers, One Attack: What Really Decides Who Survives a Breach
In April 2025, two of Britain's most recognized retailers were hit by the same adversary, using the...
How to investigate suspicious SSH logins without giving AI a shell
Dev.to · Qimin Zhao 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
How to investigate suspicious SSH logins without giving AI a shell
A lot of Linux incident response starts with a login question, not a malware sample. Someone sees a...
What “Inconclusive” Really Means: A Guide to Understanding HTPBE? Detection Results
Dev.to · Iurii Rogulia 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
What “Inconclusive” Really Means: A Guide to Understanding HTPBE? Detection Results
Getting an “inconclusive” result from HTPBE? isn’t a failure — it’s actionable intelligence. This guide explains all three verdicts and how to turn every…
Critical Unpatched RCE Vulnerability Discovered in Gogs Git Service
Dev.to · BeyondMachines 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Critical Unpatched RCE Vulnerability Discovered in Gogs Git Service
Gogs is reported to have a critical unpatched authenticated RCE vulnerability (CVSS 9.4) that allows users to execute arbitrary code via malicious branch names
How I Built an AWS Cloud Security Project as a University Student
Dev.to · Andrei Corpo 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
How I Built an AWS Cloud Security Project as a University Student
When most CS students are building simple CRUD apps for their thesis, I decided to go a different...
Event security permit compliance in Toronto: what operators and security platform builders need to know
Dev.to · GoldenGlobalHawks 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Event security permit compliance in Toronto: what operators and security platform builders need to know
Ontario PSISA compliance for Toronto events — operator licensing, SMP requirements, timelines, and the documentation gaps that kill permit applications.
Stop Uploading Your Private Files: The Case for Local-First File to JPG Conversion
Dev.to · will.indie 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Stop Uploading Your Private Files: The Case for Local-First File to JPG Conversion
We need to talk about your data handling habits. Seriously, stop sending your sensitive...
My First Cybersecurity Writeup – VAPT Experience
Dev.to · Suraj Pun Magar 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
My First Cybersecurity Writeup – VAPT Experience
Overview This is my first real-world cybersecurity VAPT experience inside an enterprise...
They Lost Millions by Clicking ‘Sign’ - Here’s How to Never Make That Mistake
Dev.to · Mahima Thacker 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
They Lost Millions by Clicking ‘Sign’ - Here’s How to Never Make That Mistake
Picture this: You're the treasurer of a major crypto exchange. Your phone buzzes with a notification...
MSF-Assistant: herramienta web de pentesting con Metasploit, nmap y msfvenom en Kali Linux
Dev.to · david ayala 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
MSF-Assistant: herramienta web de pentesting con Metasploit, nmap y msfvenom en Kali Linux
El problema que quería resolver Aprender pentesting con Metasploit tiene una curva de...
A self-hosted Google reCAPTCHA alternative (we ship it)
Dev.to · Stefan Iancu 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
A self-hosted Google reCAPTCHA alternative (we ship it)
You know the one. You're trying to subscribe to a newsletter, and Google asks you to identify all the...
Armed robbery at an NSW restaurant exposes the dispatch gap that security operators should be solving
Dev.to · GoldenGlobalHawks 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Armed robbery at an NSW restaurant exposes the dispatch gap that security operators should be solving
A stabbing at a Long Jetty restaurant shows what happens with zero response infrastructure. Here's the systems breakdown security operators need to audit.
89 drones hit the water simultaneously: the RF failure mode every event tech operator should model for
Dev.to · GoldenGlobalHawks 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
89 drones hit the water simultaneously: the RF failure mode every event tech operator should model for
89 drones dropped into Sydney Harbour mid-show due to RF interference. Here's the failure chain, the failsafe logic, and what ground-ops teams need to pre-plan.
The four-minute gap: what the Nando's machete incident reveals about incident response systems (not just training)
Dev.to · GoldenGlobalHawks 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
The four-minute gap: what the Nando's machete incident reveals about incident response systems (not just training)
A machete incident at Nando's Adelaide exposes the gap between policy docs and real incident-response systems. What operators building security workflows need t
I Scanned 200 Public GitHub Repos for Leaked .env Files — Then Built a CLI to Stop It
Dev.to · Sulthon Zainul Habib 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
I Scanned 200 Public GitHub Repos for Leaked .env Files — Then Built a CLI to Stop It
How I found exposed AWS keys, GitHub tokens, and private keys in .env files — and built envguard to catch them before they ship.
SSL vs TLS Explained: Complete HTTPS Security Guide for Modern Website Security
Dev.to · N Suresh 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
SSL vs TLS Explained: Complete HTTPS Security Guide for Modern Website Security
You’ve probably seen HTTPS in your browser and heard people mention SSL certificates when discussing...
How Developers Reduce Spam While Testing Authentication Systems
Dev.to · InboxOro 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
How Developers Reduce Spam While Testing Authentication Systems
Authentication systems are a core part of modern web applications. From signup verification and OTP...
How I Actually Verified TON Poker's RNG (And You Can Too)
Dev.to · ton-whale 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
How I Actually Verified TON Poker's RNG (And You Can Too)
TL;DR: TON Poker uses blockchain-based RNG that's more transparent than traditional poker rooms, but...
Building a Safe Telegram Bot for Crypto Poker: A Developer's Field Guide
Dev.to · Lavadera Ruttinger 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Building a Safe Telegram Bot for Crypto Poker: A Developer's Field Guide
TL;DR: Most Telegram crypto poker groups are running on insecure bot architectures that make scams...
Supply-Chain Attacks Cost $4.91M per Breach
Dev.to · Dennis Vorobyov 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Supply-Chain Attacks Cost $4.91M per Breach
IBM 2025: supply-chain breaches cost $4.91M and take 267 days to contain. Only 24% of teams trust their dependencies.
Stop pasting tokens into random websites: meet SmartDevUtils
Dev.to · Ram Chandra Samal 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Stop pasting tokens into random websites: meet SmartDevUtils
If you've done any of these in the last week — Googled "decode jwt online", clicked the first...
Linux Security Administration in Enterprise Environments
Dev.to · AndrewDangerously 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
Linux Security Administration in Enterprise Environments
Authentication, Firewalls, OS Hardening, Account Security, Cryptography, and...
How My Team from Risevest Academy and I Built an End-to-End Encrypted Messaging App in 3 Weeks
Dev.to · Victor Ayoola 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
How My Team from Risevest Academy and I Built an End-to-End Encrypted Messaging App in 3 Weeks
An account of the decisions, the mistakes, and everything I learned from building Culver.
GHES Key Rotation, Bug Bounty Program Refocus, AI Agent Permission Fatigue
Dev.to · soy 🔐 Cybersecurity ⚡ AI Lesson 1mo ago
GHES Key Rotation, Bug Bounty Program Refocus, AI Agent Permission Fatigue
GHES Key Rotation, Bug Bounty Program Refocus, AI Agent Permission Fatigue ...