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为了验证云存储中服务提供商是否完整地存储了用户的数据副本,在分析支持动态数据的持有性证明方案(RDPC)的安全缺陷(无法抵抗替换和重放攻击)的基础上,对其进行了改进和扩展,提出一种基于同态哈希技术的多副本持有性证明方案。该方案能够同时对多个副本的持有性进行验证,具有抵抗替换攻击、重放攻击和伪造攻击的能力。通过对Merkel哈希树进行改进,使方案更好地支持动态数据操作,同时利用γ编码技术,使得对数据块的验证和更新等操作过程中通信的数据量更小。
In order to verify whether the service provider stores the user's data copy completely in the cloud storage, based on the analysis of the security flaw (non-resistance to replay and replay attack) of the holding evidence scheme (RDPC) supporting dynamic data, It improves and expands and proposes a multi-copy-based proof of ownership scheme based on homomorphic hashing. The program can verify the ownership of multiple copies at the same time, with the ability to resist replacement attacks, replay attacks and counterfeit attacks. By improving the Merkel hash tree, the scheme can better support the dynamic data operation, and at the same time using the gamma coding technology, the amount of data communicated during the operation of the data block verification and updating is smaller.