I’m coming down from spending a few days at Usenix Security, right here in my hometown of Baltimore. This means that my days have been taken up with two kinds of conversation: first, explaini…

Encrypted chain-of-thought blocks returned by Anthropic, OpenAI and Google APIs are interchangeable across sessions, users and models. We exploit this to decode hidden reasoning at scale.

OpenAI shares new results on long-standing open problems in mathematics and theoretical computer science, including advances in geometry, cryptography, and complexity.

The University and Its Purpose: A Declaration of First Principles was adopted by the Vanderbilt University Board of Trust in June 2026. The declaration is organized around three core purposes: Pathbre...

Yesterday Anthropic published two new cryptanalysis results, both outputs of Claude Mythos, their (still) unreleased advanced model. The first of these results attacks a signature scheme called HAW…

This case involves Apple’s handling of user-uploaded files hosted in private iCloud storage. Instead of adopting PhotoDNA to scan hosted files for CSAM, Apple created its own proprietary alternative, ...

An AI-enabled application for cracking ciphers. Contribute to matthewdgreen/decipher development by creating an account on GitHub.

The ads use terms including “rape” and “child video” and link to content on the messaging app Telegram.

A former member of the European Parliament who served ​on a committee investigating abusive surveillance was himself hacked using an Israeli-made spy tool, a Canadian tech watchdog group ‌said on Frid...

The US government crackdown on Anthropic’s Claude Fable 5 and Mythos 5 hides a glaring truth: AI models with advanced hacking capabilities will soon be the norm.

Britain has weakened proposed cybersecurity protections for its telecoms networks that were developed in response to the Salt Typhoon espionage campaign, after the companies responsible for implementi...

Yesterday Apple announced a big step towards deploying real AI in their Siri ecosystem. In most ways this is good and inevitable: Siri is one of the world’s most widely-used voice agents, and…

This is a quick post I wanted to write about a “hobby project” I spent a weekend on. It has little to do with real cryptography, and mostly doesn’t expose a particularly exciting …