Anthropic method reconstructs P-256 seed tied to passkey security
Anthropic's timestamp-based recipe recovers P-256's public seed, offering provenance evidence while leaving some curve choices unexplained.
Anthropic has outlined a timestamp-based method that reconstructs the public seed for P-256, the elliptic curve widely used in passkey authentication. The result adds provenance evidence for the curve's parameters, according to a CryptoSlate report.
The work is relevant to Ethereum wallet security because passkey systems can rely on P-256 for signing and authentication. The source ties the finding to that use case rather than to Ethereum's core secp256k1 signing curve.
What remains unresolved
The report says the reconstruction leaves the selection criteria and the origins of the base point unexplained. Those gaps mean the method does not fully account for how the curve was chosen.
P-256 is a NIST standard curve deployed across web authentication and other security systems. The new provenance evidence is a research finding about parameter history, not a reported break of the curve itself.