论文标题
朝着隐私且轻巧的链式审核分散存储
Towards Privacy-assured and Lightweight On-chain Auditing of Decentralized Storage
论文作者
论文摘要
如何在像云这样的集中存储中审核数据外包数据是充分研究的，但是对于不断增长的分散存储网络（DSN），它在很大程度上探索了，该网络（DSN）在10亿美元的市场中都很好。为了以真正的分散方式实现DSN作为可用服务，区块链派上用场 - 以存储的形式记录和验证审计跟踪，并基于此，以解决必要的争议解决方案。 在区块链上留下审核步道具有透明度和公平性，但它1）牺牲隐私，因为它们可能会泄露有关审计数据的信息的信息，以及2）淹没了链上的资源，因为它们的规模可能很大，而且验证的昂贵。集中设置中的事先审核设计在此处不直接适用。针对DSN的一些建议也无法令人满意地解决这些问题。 我们提出了一种审计解决方案，该解决方案从具有多项式证明的多项式承诺以及可证明的隐私方面的多项式承诺以及可证明的隐私方面的多项式承诺以及可证明的隐私协议来解决链上隐私和效率。该解决方案导致每次审核，288个字节证明写给区块链，以及持续的验证成本。它可以维持长期操作，并轻松地扩展到以太坊上的数千名用户。
How to audit outsourced data in centralized storage like cloud is well-studied, but it is largely under-explored for the rising decentralized storage network (DSN) that bodes well for a billion-dollar market. To realize DSN as a usable service in a truly decentralized manner, the blockchain comes in handy -- to record and verify audit trails in forms of proof of storage, and based on that, to handle fair payments with necessary dispute resolution. Leaving the audit trails on the blockchain offers transparency and fairness, yet it 1) sacrifices privacy, as they may leak information about the data under audit, and 2) overwhelms on-chain resources, as they may be practically large in size and expensive to verify. Prior auditing designs in centralized settings are not directly applicable here. A handful of proposals targeting DSN cannot satisfactorily address these issues either. We present an auditing solution that addresses on-chain privacy and efficiency, from a synergy of homomorphic linear authenticators with polynomial commitments for succinct proofs, and the sigma protocol for provable privacy. The solution results in, per audit, 288-byte proof written to the blockchain, and constant verification cost. It can sustain long-term operation and easily scale to thousands of users on Ethereum.
