BLS12-381

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BLS12-381 implemented in Scrypto is compliant with following standards:

• IETF draft v05: BLS Signatures

• IETF RFC 9380: Hashing to Elliptic Curves

It uses ciphersuite BLS_SIG_BLS12381G2_XMD:SHA-256_SSWU_RO_POP_ , which translates into:

• Signature G2 variant (size 96 bytes)

• Public key G1 variant (size 48 bytes)

• Signature scheme POP (proof of possession)

Following methods are implemented within CryptoUtils module:

• bls12381_v1_verify() - Verify a G2 signature of given message with given public key

• bls12381_v1_aggregate_verify() - Verify an aggregated G2 signature using given vector of messages and public key tuples

• bls12381_v1_fast_aggregate_verify() - Verify an aggregated G2 signature using a given message with given multiple keys

• bls12381_g2_signature_aggregate() - Aggregate multiple G2 signatures into a single one

See the examples below:

use