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Products that do what CyberSecurity & Social Engineering does

Free educational site with CC0 cybersecurity materials

  1. 1IM
  2. 2TC

    Looking to get some feedback from the Hacker News community. I wrote the book with a focus on penetration testers and red teamers, but there are great examples for network admins, developers, and blue team defenders as well. You can pick up a copy for free here through May 19, 2019: https://gumroad.com/l/the_cyber_plumbers_handbook/hackernews... Please note, because it's hosted on Gumroad, it does require an email. If you don't want to give out your actual email, check out an anonymous email service. I give it away to students for free, so if you know of one that…

    2019

  3. 3
    Albert225

    Cybersecurity awareness on Slack for your team

    2021

  4. 4DE

    Hi HN! I'm currently a Master's student at USTC (University of Science and Technology of China). I've been diving deep into Data Engineering, especially in the context of Large Language Models (LLMs). The Problem: I found that learning resources for modern data engineering are often fragmented and scattered across hundreds of medium articles or disjointed tutorials. It's hard to piece everything together into a coherent system. The Solution: I decided to open-source my learning notes and build them into a structured book. My goal is to help developers fast-track their learning curve. Key…

    Feb 2026 · github.com

  5. 5

    CTFGuide provides tools to teach and learn cybersecurity

    2021

  6. 6

    Free Intro course on cryptography available for programmers

    2014

  7. 7HA

    2018 · hacker101.com

  8. 8

    Contribute to gmrandazzo/CheapSecurity development by creating an account on GitHub.

    Jul 2026 · github.com

  9. 9

    Security for modern teams running software

    2017

  10. 10
    CyberFuse126

    Your virtual CISO that handles compliance & security for you

    2023

  11. 11DS

    I wrote this intermediate-level book as a showcase of various FOSS, mostly command line tools. I'm a nuclear engineer and found myself teaching other nuclear, mechanical, and electrical engineers these tools again and again, so I wanted to package them into book form. I attempted to make it even broader interest, so it's not just about engineering. In the end, it's a fairly eclectic set of topics. Anyway, after selling for a few years, I just decided to release a slightly updated version of it in full for free. You'll find full HTML, PDF and ePub versions (all built with Sphinx) at the link.

    2024 · digitalsuperpowers.com

  12. 12ST

    2016 · hacksplaining.com

  13. 13

    Anthropic and OpenAI's publicly available models are explicitly guard-railed so that they refuse offensive tasks. And their cyber-focussed models are gated for enterprises. This leaves SMEs and mid market open to major vulnerabilities. AI can be used as both an adversarial and defensive tool in the world of cyber. A worst case outcome is if only the adversaries have access. Meanwhile, most existing AI cyber tools are just wrappers. The problem is that they still have all the guardrails on from the foundation model where they will inherit its refusals. For this project we've post-trained a…

    Jun 2026 · argusred.com

  14. 14
    Redential116

    A developer credential that proves what you built, NDA safe.

    Jul 2026 · redential.com

  15. 15

    Free learning resource for blockchain and crypto

    2018

  16. 16

    Empower yourself to hack and defend

    Jan 2026 · academy.subverted.io

  17. 17OS

    I built this as a small side project to learn and experiment, and I ended up with this! I used a subdomain from my personal portfolio, and everything else runs on free tiers. The project uses Nuxt, SVG, Cloudflare Workers, D1 (SQL), KV, Terraform, and some agentic coding with OpenAI Codex and Claude Code. What started as a joke among friends turned into a fun excuse to build something end to end, from zero to production, and to explore a few things I’d never touched before. I’d really appreciate any feedback or suggestions.

    Jan 2026 · certificate.brendonmatos.com

  18. 18BA

    There is too much of everything in cybersecurity. Noise, FUD, unfulfilled sales promises, incidents, things to address, information to process, technologies to look at, people to educate. I am working as a CISO and it's mostly my job to raise awareness, understand all the risks, track all current issues and prioritize them, and be able to communicate all that with proper references and examples to our management team. I've been building and dogfooding a tool that ingests much of the noise and provides focused notifications per cybersecurity topic and regular awareness texts. The idea was to…

    2023 · beyondmachines.net

  19. 19OC
  20. 20PC

    Hey HN, I’ve been working on Phended, a cybersecurity education site focused on making defensive knowledge approachable—especially for small businesses and non-technical users who don’t have time to dig through jargon-filled resources. Right now, it’s a mix of free tools, guides, and checklists, with a chatbot assistant named Dave who helps answer questions. I’m gearing up for a full refresh as I build out more content and structure things better, so it’s still early days—but I’d love to get feedback before I go too deep into the overhaul. Some stuff I’m planning - More actionable guides and…

    2025 · phended.com

  21. 21SZ

    We're launching SecureBuild: https://securebuild.com — a new way for open source projects and maintainers to earn revenue by partnering with and endorsing our Zero-CVE container images of their project. We’ve spent the last decade at Replicated (https://news.ycombinator.com/item?id=9841243) helping commercial and open source software vendors securely distribute their apps to enterprise environments. During that time, we saw firsthand how hard it is for maintainers to fund their work, and how increasingly demanding enterprises have become when it comes to demonstrable…

    2025 · securebuild.com

  22. 22

    Web security training with AI tutor & ML detection

    Jun 2026 · web-security-platform.up.railway.app

  23. 23

    Protégez votre entreprise en comprenant les cyberattaques

    Mar 2026

  24. 24

    Learn Cybersecurity By Doing

    Oct 2025

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