Wahby, Riad S., and Dan Boneh. “Fast and Simple Constant-Time Hashing to the BLS12-381 Elliptic Curve”. IACR Transactions on Cryptographic Hardware and Embedded Systems, vol. 2019, no. 4, Aug. 2019, pp. 154-79, doi:10.13154/tches.v2019.i4.154-179.