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Sam's News — anthropic — 2026-07-29

TL;DR

AI

Anthropic's Claude Mythos discovers weaknesses in encryption algorithms including post-quantum cryptography

Anthropic's Claude Mythos Preview autonomously discovered new cryptanalytic attacks against a NIST post-quantum candidate and reduced-round AES-128, exposing weaknesses experts missed for years, though neither affects deployed systems.

  • HAWK-256 key recovery cost dropped from 2^64 to 2^38 operations (~3h42m on 96-core server)
  • Attack exploited a lattice automorphism that eluded human researchers for two years
  • Claude spent ~60 hours semi-autonomously developing the HAWK attack
  • New 'Möbius Bridge' technique speeds up 7-round AES-128 attack 200-800x over 2013 method
  • AES attack needs over 400 octillion chosen plaintexts, impractical in practice
  • Each research effort cost about $100,000 in API usage
  • Findings disclosed to NIST, algorithm authors and industry before publication

Sources: Anthropic Research, CyberScoop Research, The New York Times RSS, The Hacker News RSS, The Quantum Insider RSS, The Washington Post RSS

Policy

OpenAI and Anthropic ask US government to slow AI development

Over 1,200 employees from OpenAI, Anthropic, and other AI companies signed a petition asking the US government to establish guardrails for international AI development and deliberately pace progress.

Sources: The Washington Post RSS, The Hill RSS, The Register RSS, TechCrunch RSS