serai/crypto/schnorr/README.md

# Schnorr Signatures

A challenge (and therefore HRAm) agnostic Schnorr signature library. This is
intended to be used as a primitive by a variety of crates relying on Schnorr
signatures, voiding the need to constantly define a Schnorr signature struct
with associated functions.

This library provides signatures of the `R, s` form. Batch verification is
supported via the multiexp crate. Half-aggregation, as defined in
<https://eprint.iacr.org/2021/350>, is also supported.

This library was
[audited by Cypher Stack in March 2023](https://github.com/serai-dex/serai/raw/e1bb2c191b7123fd260d008e31656d090d559d21/audits/Cypher%20Stack%20crypto%20March%202023/Audit.pdf),
culminating in commit
[669d2dbffc1dafb82a09d9419ea182667115df06](https://github.com/serai-dex/serai/tree/669d2dbffc1dafb82a09d9419ea182667115df06).
Any subsequent changes have not undergone auditing.

This library is usable under no_std, via alloc, when the default features are
disabled.
Document crypto crates with audit notices 2023-03-16 22:46:48 +00:00			`# Schnorr Signatures`

			`A challenge (and therefore HRAm) agnostic Schnorr signature library. This is`
			`intended to be used as a primitive by a variety of crates relying on Schnorr`
			`signatures, voiding the need to constantly define a Schnorr signature struct`
			`with associated functions.`

			This library provides signatures of the `R, s` form. Batch verification is
			`supported via the multiexp crate. Half-aggregation, as defined in`
Fully document crypto/ 2023-03-21 00:10:00 +00:00			`<https://eprint.iacr.org/2021/350>, is also supported.`
Document crypto crates with audit notices 2023-03-16 22:46:48 +00:00
			`This library was`
Fully document crypto/ 2023-03-21 00:10:00 +00:00			`[audited by Cypher Stack in March 2023](https://github.com/serai-dex/serai/raw/e1bb2c191b7123fd260d008e31656d090d559d21/audits/Cypher%20Stack%20crypto%20March%202023/Audit.pdf),`
			`culminating in commit`
			`[669d2dbffc1dafb82a09d9419ea182667115df06](https://github.com/serai-dex/serai/tree/669d2dbffc1dafb82a09d9419ea182667115df06).`
			`Any subsequent changes have not undergone auditing.`
Add no_std support to transcript, dalek-ff-group, ed448, ciphersuite, multiexp, schnorr, and monero-generators transcript, dalek-ff-group, ed449, and ciphersuite are all usable with no_std alone. The rest additionally require alloc. Part of #279. 2023-04-22 08:38:47 +00:00
			`This library is usable under no_std, via alloc, when the default features are`
			`disabled.`