Crate confium_tc_gg18 

GG18 threshold ECDSA over P-256 (Gennaro & Goldfeder 2018, eprint 2019/114).

Wired as a confium_tc::registry::TcScheme plugin with two scheme names registered through confium_tc::register_tc_scheme!:

• GG18-ECDSA-P256 (DKG via Feldman VSS) — produces per-party Gg18Share + shared public key.
• GG18-ECDSA-P256-SIGN — produces a standard 64-byte (r, s) ECDSA signature verifiable with the p256 crate.

See the module-level docs of keygen, sign, vss, mta for what is implemented and what is omitted. In short: the Feldman VSS, Lagrange interpolation, and threshold-ECDSA combine are all real; the MtA sub-round is a simplified in-process stub (nonce reveal in the clear) rather than a Paillier-based homomorphic MtA.

Re-exports

pub use scheme::Gg18EcdsaP256;

pub use scheme::Gg18EcdsaP256Sign;

pub use share::Gg18Share;

Modules

error

Error helpers for the GG18 scheme crate.

inprocess

In-process synchronous driver for GG18 DKG and signing.

keygen

GG18 distributed key generation over P-256.

lagrange

Lagrange interpolation in the P-256 scalar field.

mta

Multiplicative-to-Additive (MtA) sub-round.

scheme

GG18 scheme registration.

share

Per-party share material produced by GG18 DKG and consumed by signing.

sign

GG18 threshold ECDSA signing over P-256.

vss

Feldman verifiable secret sharing over P-256.

Constants

DKG_SCHEME_NAME

Canonical scheme name for GG18 DKG over P-256.

SIGN_SCHEME_NAME

Canonical scheme name for GG18 signing over P-256.