Security Websites

Micah is an information security engineer, a software engineer, an investigative data journalist, and an author. He helps journalists, researchers, and activists stay safe and productive. Micah started the Lockdown Systems Collective where he helps develop an open source app called Cyd that helps people claw back their data from Big Tech. He worked for The Intercept for a decade, where he was director of information security. He also used to work as a staff technologist at Electronic Frontier Foundation, and he helped co-found Freedom of the Press Foundation. Micah is the author of Hacks, Leaks, and Revelations: The Art of Analyzing Hacked and Leaked Data. He develops open source security tools like OnionShare and Dangerzone.

Viktor Petersson is a security nerd, bootstrapper, and remote-first entrepreneur. He is focused on building secure systems and sharing his entrepreneurial journey. Viktor's journey into tech entrepreneurship started during his college years, fueled by an obsession with computers and security. He launched YippieMove, an email migration service, and later created Blotter, a productivity app for macOS. Viktor has experience with DevSecOps and security, and has advised companies and spoken at industry events. His biggest venture has been Screenly, a digital signage platform. When he's not coding or building products, he shares his experiences through his blog and podcast.

Anthony Shaw is an open-source contributor, author, and Python Engineer at Microsoft. He writes about Python performance, compiler internals, and low-level optimization. Anthony is currently researching a PhD in Computer Science at Macquarie University. He is the author of a book about CPython internals. His open-source projects include VS Code Pets, CSnakes, Wily, Perflint, llm-github-models, and rich-bench.

Alex Gaynor is a software resilience engineer based in Washington, DC. He cares about building systems that work and has experience in the government, private sector, and open source. Alex has been very involved in open source, both writing code and serving as a director of both the Python Software Foundation and the Django Software Foundation. Originally from Chicago, he spent a few years living in San Francisco. He likes delis and bagels.

Zac Hatfield-Dodds is a member of technical staff at Anthropic, an AI safety and research company in San Francisco. He works on building reliable, interpretable, and steerable AI systems. Previously, he contributed to the Autonomy, Agency, and Assurance Institute. Zac also volunteers for community organisations and served on the board of the ACT Conflict Resolution Service and the executive of Effective Altruism ANU. He organises events like the mentored sprints and co-authored a report on PEPFAR. A PSF Fellow, Zac regularly contributes to open source software and is the lead developer of Hypothesis. He also co-maintains Pytest and started hypofuzz.com. Zac often speaks at conferences.

Adam Thompson is a software/reverse engineer and all around geek currently located in Colorado. His primary interests are in security and low-level systems development. His website serves as a place for him to occasionally write about his misadventures with technology or any other geeky topics that he may find interesting. He uses the blog to document and share whatever he’s currently working on. He also has a photography blog and another blog where he primarily writes about his outdoor adventures.

Thomas van der Berg is a certified security professional (CRTP, 2025; PNPT, 2024; OSCP, 2018; CEH, 2016) from Leeuwarden, the Netherlands. He has experience with testing web applications and IT infrastructure, and writing detailed and understandable reports about security issues. He also has a background in programming (mostly projects with JavaScript, C, C# and Python). He is a fan of Linux and free/open source software. He has been working in IT security since September 2016. Thomas is interested in independent assignments and welcomes inquiries regarding website or company security reviews. His interests include history, Linux, free and open source software, old games, music, cats, protecting human rights, travelling, and learning Chinese.

Rik Lewis is a professional web developer with over 15 years of experience building rich internet web applications. His primary focus is on security and accessibility. He has worked with various languages and frameworks, including Uniface, PHP, javascript, and jQuery. More recently, he has become a WordPress expert, creating custom themes and plugins and building sites for clients. He enjoys Lilley's Cider, particularly dry ciders.

Christian is an IT professional and open source enthusiast with a fondness for cryptography and security. He runs various servers. His PGP key fingerprint is 2340 F683 A6F2 2D39 215F 6C19 917A 4842 9BFE 2CB4. He can be contacted via email at christian@thackston.dev or through Sourcehut at cmt. His PGP key can be downloaded from his website, and the fingerprint can be verified in his Sourcehut bio and email signature. He welcomes questions and conversation.

Mathias Bynens works on Chrome at Google. He is a web standards enthusiast from Dendermonde, Belgium. His interests include HTML, CSS, JavaScript, Unicode, performance, and security. He codes websites using HTML, CSS, JavaScript, QMS, Web Guidelines of the Belgian Government, Web Guidelines Quality Model of the Dutch Government, and AnySurfer Accessibility Guidelines.

Mac Chaffee creates and deploys software. Mac focuses on DevOps, security, platform engineering, and site reliability engineering.

Anh Khoa is a junior Software Engineering student at Ton Duc Thang University. He is interested in minimalism, stoicism, reading, programming, traveling, and adventure. He writes about privacy, security, and technology on his website, aiming to help others and create value for the community. He believes in continuous learning and improvement.

Harsh Doshi is joining the University of Pennsylvania in Fall 2025 to pursue a Master’s in Computer Science. Prior to this, he worked as a Software Engineer at Salesforce for two years. He completed his undergraduate degree in Computer Science from BITS Pilani, Goa Campus. At Salesforce, he worked in software security, specifically threat and vulnerability management. He scanned vulnerabilities and bugs, deployed defenders, and monitored the health of systems and services. This website serves as his personal journal, documenting his daily insights and discoveries as he strives to improve as a software engineer.

Simon Hollingshead is a Site Reliability Engineer at Google London. His name is Simon J. Hollingshead.

Tim Coombs self hosts his infrastructure. He offers services for free through Slowb.ro, and appreciates monetary donations. His public GPG key is 3B18 1DEE 3C43 16F8 067B 30E2 BE10 16E6 0899 D5F6. He provides links to various blogs and websites he considers good reads.

Tero Karvinen teaches Free software. He offers courses at Haaga-Helia, including offensive security courses and a thesis. His courses cover topics such as Linux Servers, Information Security, Penetration Testing, Application Hacking, and Cyber Security. He also teaches courses on server management, network attacks, and reconnaissance. Tero has written books on Amazon, with over 500,000 copies sold. He has student projects in areas like PhisSticks BadUSB simulation and cryptocurrency mining dashboards.