Gandi disabled my U2F keys without warning. This sort of incompetence is why I moved all my domains away from them earlier this year (to Namecheap; Porkbun was runner-up).

Day 9 of Advent of Compiler Optimisations!

Loop with `i * i` inside? Surely the compiler replaces that expensive multiply with clever addition tricks — like manually tracking an accumulator. But no! The compiler keeps the multiply because it enables something more valuable. Why is "more expensive per iteration" sometimes faster overall? The answer lies in how modern CPUs actually execute code.

Read more: https://xania.org/202512/09-induction-variables
Watch: https://youtu.be/vZk7Br6Vh1U

#AoCO2025

@blackhoodie will have its own assembly at 39c3 congress this year 🥰 https://events.ccc.de/congress/2025/hub/de/assembly/detail/blackhoodie

New Project Zero issue:

Windows: Administrator Protection UI Access Shared Profile EoP

https://project-zero.issues.chromium.org/issues/437868751

CVE-2025-60721

Does your cybersecurity awareness training contain any hacklore?

I’m collecting examples of hacklore in the wild. Whether it’s training slides, quiz questions, or instructions that focus on rare threats instead of the ones causing the most real-world harm, I want to see it all.

Post some screenshots or notes here, or email them to "info" at hacklore.org. Let’s help organizations replace stale guidance with advice that truly keeps people safe.

I updated the structure of the #Ghidra documentation that I host so now you can access the latest of both version 11.x and 12.x:

https://scrapco.de/ghidra_docs/

I'm still looking for the docs of the new features in 12. If you think something is missing from the web that is available in the source lmk!

Do I know anyone working on freedesktop.org / mesa? A security contact would be ideal :)

Edit: Resolved

GitHub Actions Has a Package Manager, and It Might Be the Worst

https://nesbitt.io/2025/12/06/github-actions-package-manager.html

RE: https://mastodon.social/@FirewallDragons/115684533805754572

So excited to share this interview!

okay so like a month ago @trashpanda sent me one of those 'spycam finder' doodads that you see going for like 80-100 dollars online that supposedly 'find spy cameras and gps trackers'. I've always been curious if they actually work or whats inside. So I just tore the thing open and this is what I found:

That was quick: #Ghidra 12.0 is out! Here's what's new:

https://github.com/NationalSecurityAgency/ghidra/blob/Ghidra_12.0_build/Ghidra/Configurations/Public_Release/src/global/docs/WhatsNew.md

New blog post: Why the Sanitizer API is just `setHTML()` - https://frederikbraun.de/why-sethtml.html

Zuckerberg has blown 77 billion – enough money to revitalize entire countries – on an idea so overwhelmingly, obviously stupid that I have never once heard anyone, from the Thanksgiving avuncular table to the most wretched depths of social media, say they liked it or even tried it. He was so sure that it would revolutionize the world that he renamed his extremely famous company after it. And now he's on to the next thing that he's so very, very sure about.

The world needs direction from sober people who aim to improve the human condition, not the whims of a handful of billionaire princelings who absolutely, positively cannot be dissuaded from failing at unprecedented scale while chasing their own vainglory off the edge of a cliff.

Punchcards weren't only used for code. These Department of Defense punchcards from 1966 have a microfilm window used for technical drawings — in this case, a rotary telephone switch, and a font!

Portugal has modified its cybercrime law to establish a legal safe harbor for good-faith security research and to make hacking non-punishable under certain strict conditions.

https://www.bleepingcomputer.com/news/security/portugal-updates-cybercrime-law-to-exempt-security-researchers/

Fuck cancer (and bureaucrats) :(

https://bontchev.nlcv.bas.bg/bye.html

Get yourself checked!

I look at the impact of AI on future election campaigns. We're in for a wild run. Who deploys it first, wins. https://techletters.substack.com/p/techletters-insights-weaponising

New blog post. Something off-topic to feed the search engine. A bug in Lego Star Wars: The Complete Saga (2007). https://frederikbraun.de/lego-star-wars-complete-saga-c3po-bug.html

Linus Torvalds calls a spade a spade

A cool new project by a friend

Zynk - Move anything
Between everything

Send folders, photos, and multi‑gig archives across phones, laptops, TVs, and servers. End‑to‑end encrypted, resumable, no size limits.

https://zynk.it/