With the rapid development of blockchain and its applications, the amount of data stored on decentralized storage networks (DSNs) has grown exponentially. DSNs bring together affordable storage resources from around the world to provide robust, decentralized storage services for tens of thousands of decentralized applications (dApps). However, existing DSNs do not offer verifiability when implementing erasure coding for redundant storage, making them vulnerable to Byzantine encoders. Additionally, there is a lack of Byzantine fault-tolerant consensus for optimal resilience in DSNs. This paper introduces BFT-DSN, a Byzantine fault-tolerant decentralized storage network designed to address these challenges. BFT-DSN combines storage-weighted BFT consensus with erasure coding and incorporates homomorphic fingerprints and weighted threshold signatures for decentralized verification. The implementation of BFT-DSN demonstrates its comparable performance in terms of storage cost and latency as well as superior performance in Byzantine resilience when compared to existing industrial decentralized storage networks.

中文翻译：

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BFT-DSN：拜占庭容错去中心化存储网络

随着区块链及其应用的快速发展，去中心化存储网络（DSN）上存储的数据量呈指数级增长。 DSN 汇集了来自世界各地的经济实惠的存储资源，为数以万计的去中心化应用程序 (dApp) 提供强大的去中心化存储服务。然而，现有的 DSN 在为冗余存储实现纠删码时不提供可验证性，这使得它们容易受到拜占庭编码器的攻击。此外，DSN 中缺乏最佳弹性的拜占庭容错共识。本文介绍了 BFT-DSN，这是一种旨在解决这些挑战的拜占庭容错去中心化存储网络。 BFT-DSN 将存储加权 BFT 共识与纠删码相结合，并结合同态指纹和加权阈值签名进行去中心化验证。与现有的工业去中心化存储网络相比，BFT-DSN 的实施证明了其在存储成本和延迟方面具有可比性，并且在拜占庭弹性方面具有卓越的性能。