MPC on Chris Hagerhttps://www.metachris.dev/tags/mpc/Recent content in MPC on Chris HagerHugo -- gohugo.ioenWed, 21 Jul 2021 00:00:00 +0000Securing private keys with a high-performance, threshold signature-based protocolhttps://www.metachris.dev/2021/07/securing-private-keys-with-a-high-performance-threshold-signature-based-protocol/Wed, 21 Jul 2021 00:00:00 +0000https://www.metachris.dev/2021/07/securing-private-keys-with-a-high-performance-threshold-signature-based-protocol/This post is about the paper “Improving security for users of decentralized exchanges through multiparty computation”, by Robert Annessi and Ethan Fast. The paper introduces an effective algorithm for secure, collaborative signature generation using threshold signatures, and an API-key based client/server protocol that allows user-specific limits and restrictions as well as key revocations and rotations. The method supports all blockchains that use ECDSA and EdDSA signatures, which includes Bitcoin, Ethereum and the majority of popular cryptocurrencies.