Ciphersuites for elliptic curves premised on ff/group.
This library, except for the not recommended Ed448 ciphersuite, was
[audited by Cypher Stack in March 2023](https://github.com/serai-dex/serai/raw/e1bb2c191b7123fd260d008e31656d090d559d21/audits/Cypher%20Stack%20crypto%20March%202023/Audit.pdf),