A Study on a Robust Log Storage based on P2P network

通过在P2P分布式文件系统上构建防篡改的日志存储系统，可以构建基于P2P网络的健壮日志存储。每条日志消息首先通过秘密共享方案被转换成多个份额。然后使用对称可搜索加密(SSE)方案对每个共享进行加密，然后将其存储在一些P2P节点上。由于P2P节点不能被认为是诚实的，所以我们需要一个方案来验证每个节点都正确地遵循了方案。我们提出了一个可验证的单点登录方案和一个可验证的动态单点登录方案。我们已经实现了原型系统。我们发现，动态方案在每个节点上需要很高的计算代价，因此还不能用于实际应用。

Robust Log storage based on P2P network can be constructed by building tamper resistant log storage system on a P2P distributed file system. Each log message are first converted into several shares by secret sharing scheme. Then each share are encrypted with symmetric searchable encryption (SSE) scheme and then stored on some P2P nodes. Since P2P nodes could not assumed to be honest, we need a scheme which can verify that each node followed the scheme correctly. We proposed a verifiable SSE scheme and a verifiable dynamic SSE scheme. We've implemented prototype system. We found that the dynamic scheme require very high computation cost on each peer, and thus it is not yet feasible for practical use.