History

Hsiao-Wei Wang ed194de26b Bump py_ecc to v4.0.0 (IETF BLS v2 + H2C v7)		2020-05-13 02:27:51 +08:00
..
README.md	Update link	2020-01-22 11:04:45 +11:00
main.py	Update to IETF BLS draft-irtf-cfrg-bls-signature-02	2020-05-09 11:48:48 +08:00
requirements.txt	Bump py_ecc to v4.0.0 (IETF BLS v2 + H2C v7)	2020-05-13 02:27:51 +08:00

README.md

BLS Test Generator

Explanation of BLS12-381 type hierarchy The base unit is bytes48 of which only 381 bits are used

FQ: uint381 modulo field modulus
FQ2: (FQ, FQ)
G2: (FQ2, FQ2, FQ2)

Resources

Eth2 spec
Finite Field Arithmetic
Chapter 2 of Elliptic Curve Cryptography. Darrel Hankerson, Alfred Menezes, and Scott Vanstone
Zcash BLS parameters
Trinity implementation

Comments

Compared to Zcash, Ethereum specs always requires the compressed form (c_flag / most significant bit always set). Also note that pubkeys and privkeys are reversed.