thias library was integrated into https://github.com/PegaSysEng/artemis and this repository is not up to date with the recent ETH2 specyfication.

mikuli

Aggregation schema for ETH2.0

BLS Multi-Signatures With Public-Key Aggregation as described in:
https://crypto.stanford.edu/~dabo/pubs/papers/BLSmultisig.html

mikuli provides no protection against the rogue public key attack and relies on milagro crypto library for pairings on elliptic curves http://docs.milagro.io/en/.

This is still work in progress and was not reviewed by security expert.

Long term development goals:

1. Replacing milagro dependency with custom pairing library
2. Security audit

Curve: BLS-12 381

installation:

Building:            gradle clean build
Testing:             gradle test
Benchmarking: gradle benchmark

Group operation benchmarks:

Benchmark	Mode	Cnt	Score	Error	Units
G1Benchmarks.pointAdditionInG1	avgt	40	0.005 ±	0.001	ms/op
G1Benchmarks.pointMultiplicationInG1	avgt	40	1.514 ±	0.025	ms/op
G2Benchmarks.pointAdditionInG2	avgt	20	0.017 ±	0.001	ms/op
G2Benchmarks.pointMultiplicationInG2	avgt	20	4.287 ±	0.086	ms/op
GTBenchmarks.pointMultiplicationInGT	avgt	20	0.053 ±	0.009	ms/op
PairingBenchmarks.pairing	avgt	60	13.316 ±	0.164	ms/op
SerializationBenchmarks.pointDeSerializationNoCompression	avgt	20	0.004 ±	0.001	ms/op
SerializationBenchmarks.pointDeSerializationWithCompression	avgt	20	0.189 ±	0.005	ms/op

example:

    KeyPair keyPair = KeyPairFactory.createKeyPair();
    byte[] message = "Hello".getBytes();
    SignatureAndPublicKey sigAndPubKey = BLS12381.sign(keyPair, message);

    Boolean isValid = BLS12381.verify(sigAndPubKey.publicKey(), sigAndPubKey.signature(), message);
    assertTrue(isValid);