This crate provides libraries and command line interfaces for producing threshold BLS signatures. The signatures can also be blind in order to preserve the privacy of the user asking for a signature from another set of parties.

Distributed Key Generation for generating the threshold public key is based on Secure Distributed Key Generation for Discrete-Log Based Cryptosystems

Build with cargo build (--release).

Test with cargo test.

All crates require Rust 2018 edition and are tested on the following channels:

• 1.41.0

If you do not have Rust installed, run: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

The library compiles to Android and iOS. This has been tested with Rust v1.41.0.

To compile to Android:

1. Download Android NDK r21 and unzip it
2. Set the NDK_HOME env var to the extracted directory
3. cd cross
4. ./create-ndk-standalone
5. make android

To compile to ios: 3. cd cross 4. make ios

This repository contains several Rust crates that implement the different building blocks of the MPC. The high-level structure of the repository is as follows:

• dkg-cli: Rust crate that provides a CLI for the distributed key generation
• dkg-core: Rust crate that provides the implementation utilities for the DKG
• threshold-bls: (blind) threshold BLS signatures for BLS12-381 and BLS12-377
• threshold-bls-ffi: FFI and WASM bindings to threshold-bls for cross platform interoperability

This software has not been audited. Use at your own risk.