VBFT: Veloce Byzantine Fault Tolerant Consensus for Blockchains
| Autor: | Jalalzai, Mohammad M., Feng, Chen, Lemieux, Victoria |
|---|---|
| Rok vydání: | 2023 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Low latency is one of the most desirable features of partially synchronous Byzantine consensus protocols. Existing low-latency protocols have achieved consensus with just two communication steps by reducing the maximum number of faults the protocol can tolerate (from $f = \frac{n-1}{3}$ to $f = \frac{n+1}{5}$), \textcolor{black}{by relaxing protocol safety guarantees}, or by using trusted hardware like Trusted Execution Environment. Furthermore, these two-step protocols don't support rotating leaders and low-cost view change (leader replacement), which are important features of many blockchain use cases. In this paper, we propose a protocol called VBFT which achieves consensus in just two communication steps without sacrificing desirable features. In particular, VBFT tolerates $f = \frac{n-1}{3}$ faults (which is the best possible), guarantees strong safety for honest leaders, and requires no trusted hardware. Moreover, VBFT supports leader rotation and low-cost view change, thereby improving prior art on multiple axes. Comment: arXiv admin note: substantial text overlap with arXiv:2109.14604 |
| Databáze: | arXiv |
| Externí odkaz: |
|