Quoting Matthew Green

Cryptographer Matthew Green said the transition from EC-based and RSA algorithms to post-quantum cryptography makes this an ideal time for AI to advance cryptanalysis, potentially strengthening confidence in hard problems. Green commented on Anthropic's recent work using Claude to discover cryptographic weaknesses, noting that unless AI undermines all hard problems, the field could gain more robust cryptanalysis literature.

Right now we’re in the midst of a historic transition from traditional public-key algorithms based on EC-based cryptography and RSA, moving over to new post-quantumalgorithms based on novel problems. This is why there are so many standards like HAWK being considered. If there was ever a perfect time for a massive new public cryptanalysis capability to come on line,we’re in it.So unless AIs succeed in undermining all of our hard problems altogether or we live in Impagliazzo’s Minicrypt then this could not be a better time for AI to get good at cryptanalysis. In the best case, the result is that we gain real confidence in the problems we’ve identified, and the cryptanalysis literature gets a lot more robust. Hopefully. — Matthew Green https://blog.cryptographyengineering.com/2026/07/29/some-notes-about-anthropics-new-results/ , on Anthropic's recent cryptography work https://simonwillison.net/2026/Jul/28/discovering-cryptographic-weaknesses-with-claude/ Tags: anthropic https://simonwillison.net/tags/anthropic , claude https://simonwillison.net/tags/claude , generative-ai https://simonwillison.net/tags/generative-ai , cryptography https://simonwillison.net/tags/cryptography , ai https://simonwillison.net/tags/ai , llms https://simonwillison.net/tags/llms , ai-security-research https://simonwillison.net/tags/ai-security-research , claude-mythos-fable https://simonwillison.net/tags/claude-mythos-fable