# FROST (Flexible Round-Optimised Schnorr Threshold signatures) Core

Base traits and types in Rust that implement ['Two-Round Threshold Schnorr Signatures with
FROST'](https://datatracker.ietf.org/doc/draft-irtf-cfrg-frost/) generically for
[`Ciphersuite`] implementations.

For key generation, refer to the [`keys`] module. For round-specific
types and functions, refer to the [`round1`] and [`round2`] modules. This module
contains types and functions not directly related to key generation and the
FROST rounds.


## Status ⚠

The FROST specification is not yet finalized, though no significant changes are
expected at this point. This code base has been audited by NCC. The APIs and
types in `frost-core` are subject to change during the release candidate phase,
and will follow SemVer guarantees after 1.0.0.

## Usage

`frost-core` implements the base traits and types in a generic manner, to enable top-level
implementations for different ciphersuites / curves without having to implement all of FROST from
scratch. End-users should not use `frost-core` if they want to sign and verify signatures, they
should use the crate specific to their ciphersuite/curve parameters that uses `frost-core` as a
dependency, such as [`frost_ristretto255`](../frost_ristretto255).

## Example

See ciphersuite-specific crates, e.g. [`frost_ristretto255`](../frost_ristretto255).