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16 October 2026 · Anthropic

Claude traces the numbers behind digital signatures

Anthropic says an internal Claude model traced the starting numbers behind digital signatures within half an hour. Their origins had remained unexplained for decades.

By Mara Masaeva · Updated 17 October 2026

CapabilityConfirmedMore than one independent source, or a primary document.

What happened

Digital signatures help verify that data is authentic. Anthropic traced the numbers behind some widely used building blocks to an old random-number generator initialized with a timestamp. Published code reproduces them.

What I do not know

This does not break the security. It reduces suspicions of deliberate manipulation. Some choices, including skipped candidates, remain unexplained.

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Sources

  1. Anthropic: Claude reveals ECDSA curve originsprimary · main source