Fast and Secure Consensus Protocol for Ethereum 2.0

Abstract

There have been many attacks threatening the security of LMD-GHOST, the consensus protocol adopted in Ethereum 2.0. Therefore, a consensus protocol which is provably secure is needed. The existing work "Goldfish" is provably secure but requires 3Δ rounds per slot, with Δ being the maximum network delay. In this study, we propose a provably secure protocol with a structure of 2Δ rounds per slot by parallelizing the block proposal phase and the voting phase in Goldfish. By reducing the number of rounds per slot, transaction processing speed increases, leading to enhancing scalability.