Module sign

DKLs23 sign. Distributed Signature Generation (DSG) Protocol Implementation

This module implements a distributed signature generation protocol that allows multiple parties to collaboratively generate digital signatures without any single party knowing the complete private key.

Protocol Overview

The DSG protocol consists of two main phases:

1. Pre-signing phase: Generates a pre-signature that can be completed later
2. Finish phase: Completes the signature using the pre-signature

Security Properties

The protocol provides the following security guarantees:

• Threshold security: Signatures can only be generated with a sufficient number of parties
• Privacy: No information about the private key is leaked
• Verifiability: Signatures can be verified using standard ECDSA verification

Structs

PreSign

Result of the pre-signature phase for a party

RecoveryId

Recovery IDs, a.k.a. “recid”.

Enums

DsgVariant

Variants of the Distributed Signature Generation protocol

SignError

Error types that can occur during the Distributed Signature Generation protocol

Functions

finish

Executes the finish phase of the DSG protocol

message_receivers

Generates a map of message receivers for the DSG protocol

pre_signature

Executes the pre-signature phase of the DSG protocol

run

Main entry point for the DSG protocol

Type Aliases

Signature

ECDSA/secp256k1 signature (fixed-size)

VerifyingKey

ECDSA/secp256k1 verification key (i.e. public key)