Claude Mythos Preview Discovers Cryptographic Weaknesses That Human Experts Missed for Years

Anthropic researchers using Claude Mythos Preview have uncovered mathematical flaws in major cryptographic algorithms that human experts failed to spot for years. The AI found improved attacks against HAWK, a post-quantum digital signature scheme, and a reduced-round version of AES, the world’s most widely used symmetric cipher. Neither result threatens production systems today, but both mark a significant shift in how artificial intelligence can stress-test the foundations of digital security. Cryptographic algorithms protect everything from online banking to encrypted web traffic. Digital signature schemes verify that a website is authentic, while symmetric ciphers keep data private between parties sharing a secret key. Flaws...

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