一种多副本动态数据持有性证明方案

摘要

针对云存储环境下,验证多个远程副本的完整性效率低,不支持动态数据更新的问题,提出了一种多副本动态数据持有性证明方案.首先给出面向分布式云存储系统的多副本验证模型,然后利用双线性映射和伪随机掩码技术设计了一种多副本数据持有性证明方案.通过把每个数据块映射为种子映射表的一个表项,解决多个副本同时进行动态修改的问题.安全分析和性能评估表明,文中方案是正确且完备的,并显著提高了多副本动态数据持有性证明的效率.%In the cloud storage paradigm,verifying the integrity of multiple remote copies is inefficient,and dynamic data updates are not supported.To solve this problem,we first propose a multi-copy integrity checking model for the distributed cloud storage system,and then design a multi-copy provable data possession scheme based on the bilinear map and pseudo-random mask technique.Aiming at updating multiple copies,each data block is mapped to an entry in the seed mapping table.Security analysis and performance evaluation show that our scheme is correct and complete,and can significantly improve efficiency.