P256 verifiers

[Divide-By-0]

Hey, curious if you saw https://github.com/privacy-scaling-explorations/circom-ecdsa-p256 or https://github.com/zkwebauthn/webauthn-halo2 when searching for a circom or Halo 2 p256 circuit respectively, and if you did, what trouble did you have using them?

[siddhantsharma301]

hey! we have seen the work from pse and zk webauthn, but we chose to use sp1/zkvm based approach just as a proof-of-concept to show how we could verify the signatures from apple's hardware on-chain efficiently. in practice, we would likely choose to use either the libraries you've suggested or wait for on-chain verification for sp1 proofs!