Crate synedrion

Threshold signing library based on CGGMP’21 scheme.

This library is based on the scheme described in “UC Non-Interactive, Proactive, Threshold ECDSA with Identifiable Aborts” by R. Canetti, R. Gennaro, S. Goldfeder, N. Makriyannis, and U. Peled, DOI:10.1145/3372297.3423367 (preprint is available at https://eprint.iacr.org/2021/060, and it has been revised compared to the published version).

Re-exports

• pub use k256;
• pub use signature;

Modules

• ecdsa
  Elliptic Curve Digital Signature Algorithm (ECDSA).
• sessions
  Mutable wrappers around the protocols for easier handling.

Structs

• InteractiveSigningResult
  Possible results of the merged Presigning and Signing protocols.
• KeyGenResult
  Possible results of the merged KeyGen and KeyRefresh protocols.
• KeyInitResult
  Possible results of the KeyGen protocol.
• KeyRefreshResult
  Possible results of the KeyRefresh protocol.
• KeyShare
  The full key share with auxiliary parameters.
• KeyShareChange
  The result of the Auxiliary Info & Key Refresh protocol - the update to the key share.
• PresigningProof
  A proof of a node’s correct behavior for the Presigning protocol.
• PresigningResult
  Possible results of the Presigning protocol.
• ProductionParams
  Production strength parameters.
• RecoverableSignature
  A wrapper for a signature and public key recovery info.
• SigningProof
  A proof of a node’s correct behavior for the Signing protocol.
• SigningResult
  Possible results of the Signing protocol.
• TestParams
  Scheme parameters for testing purposes only. Security is weakened to allow for faster execution.
• ThresholdKeyShare
  A threshold variant of the key share, where any threshold shares our of the total number is enough to perform signing.

Enums

• InteractiveSigningError
  Possible verifiable errors of the merged Presigning and Signing protocols.
• InteractiveSigningProof
  A proof of a node’s correct behavior for the merged Presigning and Signing protocols.
• KeyGenError
  Possible verifiable errors of the merged KeyGen and KeyRefresh protocols.
• KeyGenProof
  A proof of a node’s correct behavior for the merged KeyGen and KeyRefresh protocols.
• KeyInitError
  Possible verifiable errors of the KeyGen protocol.
• PresigningError
  Possible verifiable errors of the Presigning protocol.

Traits

• ProtocolResult
  Typed outcomes of a protocol, specific for each protocol (in addition to non-specific errors common for all protocols).
• SchemeParams
  Signing scheme parameters.