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Morning Edition · Wednesday, July 29, 2026Published at 1:31 AM EDT · New York
Anthropic Says Claude Found a Real Weakness in a Post-Quantum Signature Under US Review
The model broke a 256-bit version of the HAWK candidate in about 60 hours for roughly 100,000 dollars, and separately sped up an attack on a reduced version of the AES cipher.
Anthropic said its Claude Mythos Preview model helped its researchers find weaknesses in two cryptographic constructions, a post-quantum digital signature scheme and a widely studied symmetric cipher. In research published on July 28, the c…
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Quantum Risk Moves From Theory to Crypto Roadmaps
Over the next 3-6 months, quantum-resistance becomes a concrete design and custody concern across major chains and institutional custodians, driving opt-in post-quantum schemes and 'long-dormant coin' risk discussion.
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