Anthropic’s AI Finds Weaknesses in the Technology Protecting Your Data

NewsTue, 28 Jul 2026 17:33:36 UTC4 hours ago

Anthropic said on Tuesday that its Claude AI found new weak spots in two encryption systems. Encryption is the math that hides your messages, logins and bank details from strangers.

Nothing you use today is at risk. But the news matters for a different reason. A machine did work that top human experts had missed.

What Is HAWK, and What Broke

HAWK is a digital signature. Think of it as an ID check for websites and messages. It was built to survive future quantum computers. Experts reviewed it for two years and found nothing. Claude found a hidden pattern in HAWK's math in 60 hours.

New Anthropic research: Discovering cryptographic weaknesses with Claude.

Claude Mythos Preview has helped our researchers find weaknesses in cryptographic algorithms-the mathematical methods that are used to keep data private.

Read more: https://t.co/TYKLjb3Q7V
- Anthropic (@AnthropicAI) July 28, 2026

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By Anthropic's own figures, cracking the smallest HAWK key fell from 2^64 steps to 2^38. That is roughly 67 million times less work. The method is in Anthropic's paper.

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Anthropic’s AI Finds Weaknesses in the Technology Protecting Your Data

What Is HAWK, and What Broke

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