Crate tbs

Threshold Blind Signatures

This library implements an ad-hoc threshold blind signature scheme based on BLS signatures using the (unrelated) BLS12-381 curve.

Modules

• hash
• poly
• serde_impl

Structs

• AggregatePublicKey
• BlindedMessage
• BlindedSignature
• BlindedSignatureShare
• BlindingKey
• Message
• MessagePoint
  This is an element of $\mathbb{G}_1$ represented in the affine coordinate space. It is ideal to keep elements in this representation to reduce memory usage and improve performance through the use of mixed curve model arithmetic.
• PubKeyPoint
  This is an element of $\mathbb{G}_2$ represented in the affine coordinate space. It is ideal to keep elements in this representation to reduce memory usage and improve performance through the use of mixed curve model arithmetic.
• PublicKeyShare
• Scalar
  Represents an element of the scalar field $\mathbb{F}_q$ of the BLS12-381 elliptic curve construction.
• SecretKeyShare
• Signature

Traits

• Aggregatable
• FromRandom

Functions

• blind_message
• combine_valid_shares
  Combines a sufficient amount of valid blinded signature shares to a blinded signature. The responsibility of verifying the supplied shares lies with the caller.
• dealer_keygen
  threshold: how many signature shares are needed to produce a signaturekeys: how many keys to generate
• sign_blinded_msg
• unblind_signature
• verify
• verify_blind_share