Anthropic announced on Oct. 16 that Claude helped reconstruct the public seed behind P-256, a NIST-standardized cryptographic curve supported for Ethereum passkey signing. The published recipe initializes an old C-library generator with a timestamp for Aug. 16, 1997, at 01:52:34 UTC, advancing to candidate 1842 to obtain the P-256 value. This finding makes deliberate backdoors less plausible, though selection criteria and the origin of P-256’s base point remain unresolved. No user action is needed, and the Ethereum connection runs through EIP-7951, which specifies P-256 signature verification on hardware including Apple Secure Enclave, Android Keystore and FIDO2/WebAuthn devices.
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