dss

Documentation

Overview

Run a NonceDKG and sign the supplied hash.

This is a simplified implementation. Later the DKG part can be run in advance, while waiting for transactions.

The general workflow is the following:

1. Start it upon activation of a step (last stateOutput is approved).
2. Exchange the underlying messages until: 2.1. ACSS Intermediate output is received.
3. Then wait for the ACS and then the VM to complete: 3.1. pass the ACS result to the nonce-dkg (to complete the nonces). 3.2. pass the VM output as a message to sign (its hash).
4. Exchange messages until the signature is produced.
5. Output the signature.

TODO: Make sure no two signatures are ever produced by the nonce-dkg for the same

base TX. That would reveal the permanent private key of the committee.

Index

• func GenDistSecret(suite dkg.Suite, nbParticipants int, partSec []kyber.Scalar, ...) []*dkg.DistKeyShare
• func GenPair(suite dkg.Suite) (kyber.Scalar, kyber.Point)
• func NewInputDecided(decidedIndexProposals map[gpa.NodeID][]int, messageToSign []byte) gpa.Input
• func NewInputStart() gpa.Input
• type DSS
  • func New(suite suites.Suite, nodeIDs []gpa.NodeID, nodePKs map[gpa.NodeID]kyber.Point, ...) DSS
• type Output

Functions

func GenDistSecret

func GenDistSecret(suite dkg.Suite, nbParticipants int, partSec []kyber.Scalar, partPubs []kyber.Point) []*dkg.DistKeyShare

func GenPair

func GenPair(suite dkg.Suite) (kyber.Scalar, kyber.Point)

func NewInputDecided

func NewInputDecided(decidedIndexProposals map[gpa.NodeID][]int, messageToSign []byte) gpa.Input

func NewInputStart

func NewInputStart() gpa.Input

Types

type DSS

type DSS interface {
	AsGPA() gpa.GPA
}

func New

func New(
	suite suites.Suite,
	nodeIDs []gpa.NodeID,
	nodePKs map[gpa.NodeID]kyber.Point,
	f int,
	me gpa.NodeID,
	mySK kyber.Scalar,
	longTermSecretShare tcrypto.SecretShare,
	log *logger.Logger,
) DSS

type Output

type Output struct {
	ProposedIndexes []int  // Intermediate output.
	Signature       []byte // Final output.
}