MPC-Over-Signal

In this blog we show how we use the Signal messenger server to facilitate secure communication over the internet between nodes in a network. We leverage this infrastructure to run a secure multiparty computation (MPC) and specifically to run a threshold BLS signature protocol. Our open source library (written in Rust) utlilizes the existing yet undocumented Signal server API and can be used to build applications with baked-in security and privacy properties.