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InfoNews
Claude reveals ECDSA curve origins
- Published
- Record updated
Summary
Anthropic reports that Claude determined the origin of the seed values for the NIST P-192, P-224, P-256, P-384 and P-521 elliptic curves, which NIST adopted in 2000 as part of FIPS 186-2. The seeds were not hash outputs but the result of the C library's lrand48 generator seeded with a Unix timestamp, a process that took under half an hour in October 2026. Anthropic says this is not a cryptographic break and makes it more confident the curves were chosen without backdoors.