Tofn (t-of-n): a threshold cryptography library in Rust

Tofn provides the following:

• An implementation of ECDSA SECP256k1 signing scheme.

• An implementation of ED25519 signing scheme.

• A general-purpose SDK (software development kit) to facilitate the development and use of threshold cryptography protocols such as GG20.

Setup

• Get the latest version of Rust stable.
• Clone this repo.
• Run cargo build --release to build the library.
• Run cargo test --release to run the tests.

Threshold cryptography

For an implementation of the GG20 threshold-ECDSA protocol, see this version of tofn. The GG20 protocol implementation should not be considered ready for production since it doesn't protect against recently discovered attacks on the protocol implementation. This was removed from tofn as it is not being used in the Axelar protocol.

Security notes

• In our security model, we don't guarantee security if the attacker has access to the device.

Message ordering

• We assume that an honest party's Round x message is sent before Round x + i.
• We also assume that no party receives a Round x + i message from any other party before their Round x message.

License

All crates licensed under either of

• Apache License, Version 2.0
• MIT license

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.