go-blindsecp256k1

Blind signature over secp256k1, based on "An Efficient Blind Signature Scheme Based on the Elliptic Curve Discrete Logarithm Problem" paper.

WARNING: this repo is experimental, do not use in production.

Usage

// message to be signed
msg := new(big.Int).SetBytes([]byte("test"))

// create new signer
signerPrivateData := blindsecp256k1.NewSigner()
signerPublicData := signerPrivateData.PublicData()

// user blinds the msg
msgBlinded, user := blindsecp256k1.Blind(msg, signerPublicData)

// signer signs the blinded message
sBlind := signerPrivateData.BlindSign(msgBlinded)

// user unblinds the blinded signature
sig := blindsecp256k1.Unblind(sBlind, msg, user)

// signature can be verified with signer PublicKey
verified := blindsecp256k1.Verify(msg, sig, signerPublicData.Q)
assert.True(t, verified)