threshold

Dec 21, 2025

Changes in this version

+ var ErrFullRankFailed = errors.New("full rank check failed")

+ var ErrInsufficientData = errors.New("insufficient round data")

+ var ErrInvalidPartyCount = errors.New("need at least 2 parties")

+ var ErrInvalidPartyIndex = errors.New("party index out of range")

+ var ErrInvalidThreshold = errors.New("threshold must be > 0 and < total parties")

+ var ErrMACVerifyFailed = errors.New("MAC verification failed")

+ func GenerateKeys(t, n int, randSource io.Reader) ([]*KeyShare, *GroupKey, error)

+ func Verify(groupKey *GroupKey, message string, sig *Signature) bool

+ type GroupKey struct

+ A structs.Matrix[ring.Poly]

+ BTilde structs.Vector[ring.Poly]

+ Params *Params

+ func (gk *GroupKey) Bytes() []byte

+ type KeyShare struct

+ GroupKey *GroupKey

+ Index int

+ Lambda ring.Poly

+ MACKeys map[int][]byte

+ Seeds map[int][][]byte

+ SkShare structs.Vector[ring.Poly]

+ type Params struct

+ R *ring.Ring

+ RNu *ring.Ring

+ RXi *ring.Ring

+ func NewParams() (*Params, error)

+ type Round1Data struct

+ D structs.Matrix[ring.Poly]

+ MACs map[int][]byte

+ PartyID int

+ type Round2Data struct

+ PartyID int

+ Z structs.Vector[ring.Poly]

+ type Signature struct

+ C ring.Poly

+ Delta structs.Vector[ring.Poly]

+ Z structs.Vector[ring.Poly]

+ type Signer struct

+ func NewSigner(share *KeyShare) *Signer

+ func (s *Signer) Finalize(round2Data map[int]*Round2Data) (*Signature, error)

+ func (s *Signer) Round1(sessionID int, prfKey []byte, signers []int) *Round1Data

+ func (s *Signer) Round2(sessionID int, message string, prfKey []byte, signers []int, ...) (*Round2Data, error)