gminney/blsjava

A Java library for the BLS12-381 curve for use within the ThoughtJ library.

BLS12-381 Implementation for Java

NOTE: THIS LIBRARY IS NOT YET FORMALLY REVIEWED FOR SECURITY

Implements BLS signatures with aggregation compatible with relic toolkit for cryptographic primitives (pairings, EC, hashing) according to the IETF BLS RFC with these curve parameters for BLS12-381.

Features:

• Non-interactive signature aggregation following IETF specification
• Efficient verification using Proof of Possession (only one pairing per distinct message)
• Aggregate public keys and private keys
• EIP-2333 key derivation (including unhardened BIP-32-like keys)
• Key and signature serialization
• Batch verification

Before you start

This library uses minimum public key sizes (MPL). A G2Element is a signature (96 bytes), and a G1Element is a public key (48 bytes). A private key is a 32 byte integer. There are three schemes: Basic, Augmented, and ProofOfPossession. Augmented should be enough for most use cases, and ProofOfPossession can be used where verification must be fast.

Import the library

Coming soon.

Creating keys and signatures

Coming soon.

Serializing keys and signatures to bytes

Coming soon.

Loading keys and signatures from bytes

Coming soon.

Create aggregate signatures

Coming soon.

Arbitrary trees of aggregates

Coming soon.

Very fast verification with Proof of Possession scheme

Coming soon.

HD keys using EIP-2333

Coming soon.

Build

Performance times coming soon.

Import the library to use it

Coming soon.

Contributing and workflow

Make a pull request.

Specification and test vectors

The IETF bls draft is followed. Test vectors can also be seen in the python and cpp test files.

Relic license

Relic is used with the Apache 2.0 license