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Merge pull request #2051 from ethereum/bls_v3 

Bump IETF BLS standard version to -03
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Danny Ryan 2020-09-14 11:00:19 -06:00 committed by GitHub
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specs/phase0/beacon-chain.md
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@ -603,7 +603,7 @@ def bytes_to_uint64(data: bytes) -> uint64:
#### BLS Signatures
Eth2 makes use of BLS signatures as specified in the [IETF draft BLS specification draft-irtf-cfrg-bls-signature-02](https://tools.ietf.org/html/draft-irtf-cfrg-bls-signature-02) but uses [Hashing to Elliptic Curves - draft-irtf-cfrg-hash-to-curve-07](https://tools.ietf.org/html/draft-irtf-cfrg-hash-to-curve-07) instead of draft-irtf-cfrg-hash-to-curve-06. Specifically, eth2 uses the `BLS_SIG_BLS12381G2_XMD:SHA-256_SSWU_RO_POP_` ciphersuite which implements the following interfaces:
Eth2 makes use of BLS signatures as specified in the [IETF draft BLS specification draft-irtf-cfrg-bls-signature-03](https://tools.ietf.org/html/draft-irtf-cfrg-bls-signature-03). Specifically, eth2 uses the `BLS_SIG_BLS12381G2_XMD:SHA-256_SSWU_RO_POP_` ciphersuite which implements the following interfaces:
- `def Sign(SK: int, message: Bytes) -> BLSSignature`
- `def Verify(PK: BLSPubkey, message: Bytes, signature: BLSSignature) -> bool`