This paper introduces Hamster, a novel synchronous Byzantine Fault Tolerance protocol that achieves better performance and has weaker dependency on synchrony. Specifically, Hamster employs coding techniques to significantly decrease communication complexity and addresses coding related security issues. Consequently, Hamster achieves a throughput gain that increases linearly with the number of nodes, compared to Sync HotStuff. By adjusting the block size, Hamster outperforms Sync HotStuff in terms of both throughput and latency. Moreover, With minor modifications, Hamster can also function effectively in mobile sluggish environments, further reducing its dependency on strict synchrony. We implement Hamster and the experimental results demonstrate its performance advantages. Specifically, Hamster's throughput in a network of 9 nodes is 2.5× that of Sync HotStuff, and this gain increases to 10 as the network scales to 65 nodes.
@article{arxiv.2409.19564,
title = {Hamster: A Fast Synchronous Byzantine Fault Tolerance Protocol},
author = {Ximing Fu and Mo Li and Qingming Zeng and Tianyang Li and Shenghao Yang and Yonghui Guan and Chuanyi Liu},
journal= {arXiv preprint arXiv:2409.19564},
year = {2024}
}