基于洋葱加密的对等云存储安全研究

Research on P2P Cloud Storage Security based on Onion Encryption

对等云存储技术运用对等网来构建云系统的底层覆盖网络,具有扩展性好、成本低等优点。但由于对等网络中的节点存在信任度低等问题,因此,采用常规安全技术已不适应对等云存储的需求。针对这些问题,运用洋葱加密的组合加密机制,在资源发布时,运用同态加密技术对其关键字进行加密;在数据存储时,运用对称加密技术对数据进行加密,然后运用非对称加密技术加密对称密钥。经分析说明,提出的加密机制在确保安全的情况下兼顾了效率与易用性,对解决对等云系统的安全问题具有一定的价值。

P2P cloud storage technology uses P2P network to build the underlying overlay network of cloud system,which has the advantages of good scalability and low cost.Due to the low trust of nodes in P2P network,the conventional security technology can’t meet the needs of P2P cloud storage.In view of the above problems,this paper uses the combination encryption mechanism of onion encryption,and uses homomorphic encryption technology to encrypt the keywords when publishing resources.In data storage,symmetric encryption technology is used to encrypt data,and then asymmetric encryption technology is used to encrypt symmetric key.The analysis shows that the encryption mechanism proposed in this paper gives consideration to efficiency and ease of use while ensuring security,which has a certain value to solve the security problem of peer-to-peer cloud system.