Claude Cracks Decades-Old Crypto Mystery: Origins of NIST P-256 Curve Seeds Revealed

matthew_d_green · x · 2026-10-17

Anthropic reports that Claude helped solve the decades-old mystery of the ECDSA seed values. The seeds defining NIST standard elliptic curves like P-256 were supplied by the NSA in 2000 with no explanation, fueling years of backdoor speculation and even a community bounty.

The answer: NSA veteran Jerry Solinas generated them from hashes of a humorous passphrase (along the lines of "Give Bob and Jerry a raise") with a counter, with no malicious construction involved.

Anthropic frames this as a fun closing chapter to years of speculation — no action needed, as most researchers already trusted the curves.

Related event: Claude Cracks Decades-Old Mystery of ECDSA Curve Seeds in Under 30 Minutes(5 posts)→

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