Shamir

Multi-party threshold cryptography library in Go.

A zero-dependency library implementing Shamir's Secret Sharing, Verifiable Secret Sharing (Feldman, Pedersen), and proactive share refresh.

Crypto Library

The pkg/ packages are importable by any Go project with no transitive dependencies beyond stdlib:

import (
    "github.com/aalpar/shamir/pkg/field"
    "github.com/aalpar/shamir/pkg/sss"
)

// Create a prime field
f := field.New(prime)

// Split a secret into 5 shares with threshold 3
shares, err := sss.Split(secret, 5, 3, f)

// Reconstruct from any 3 shares
recovered, err := sss.Combine(shares[:3])

Domain Types

The threshold/ package defines platform-independent types for threshold secret lifecycle management: scheme selection, share configuration, participant tracking, and phase transitions.

Status

Early development. The crypto primitives are implemented; higher-level coordination protocols are next.

License

Apache License 2.0. See LICENSE.