Visible to the public The Honey Badger of BFT Protocols

TitleThe Honey Badger of BFT Protocols
Publication TypeConference Paper
Year of Publication2016
AuthorsMiller, Andrew, Xia, Yu, Croman, Kyle, Shi, Elaine, Song, Dawn
Conference NameProceedings of the 2016 ACM SIGSAC Conference on Computer and Communications Security
Conference LocationNew York, NY, USA
ISBN Number978-1-4503-4139-4
Keywordsasynchronous, atomic broadcast, BFT, blockchain, blockchain security, controller area network security, controller area networks, Internet of Things, Internet of Things (IoT), pubcrawl, Resiliency

The surprising success of cryptocurrencies has led to a surge of interest in deploying large scale, highly robust, Byzantine fault tolerant (BFT) protocols for mission-critical applications, such as financial transactions. Although the conventional wisdom is to build atop a (weakly) synchronous protocol such as PBFT (or a variation thereof), such protocols rely critically on network timing assumptions, and only guarantee liveness when the network behaves as expected. We argue these protocols are ill-suited for this deployment scenario. We present an alternative, HoneyBadgerBFT, the first practical asynchronous BFT protocol, which guarantees liveness without making any timing assumptions. We base our solution on a novel atomic broadcast protocol that achieves optimal asymptotic efficiency. We present an implementation and experimental results to show our system can achieve throughput of tens of thousands of transactions per second, and scales to over a hundred nodes on a wide area network. We even conduct BFT experiments over Tor, without needing to tune any parameters. Unlike the alternatives, HoneyBadgerBFT simply does not care about the underlying network.

Citation Keymiller_honey_2016