关键词: 云存储, 云安全, 多副本, 动态数据, 持有性证明

Abstract:

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.

Key words: cloud storage, cloud security, multiple copies, dynamic data, possession proving