云存储系统中数据完整性验证协议

在云存储网络环境中，数据的安全性和完整性是用户最关心的问题之一。综合考虑云存储网络环境中的安全需求，设计了云存储数据完整性验证(CS-DIV)协议。客户端把数据文件和校验标签上传到云存储服务器后随机抽查，服务器返回验证证据并由客户端判断文件的完整性。协议可以有效地验证云存储数据的完整性，并抵抗恶意服务器欺骗和恶意客户端攻击，从而提高整个云存储系统的可靠性和稳定性。仿真实验数据表明，所提协议以较低的存储、通信及时间开销实现了数据的完整性保护。

Data integrity verification protocol in cloud storage system

In the cloud storage network, the security and integrity of data are the major concerns of clients. Taking full consideration of the security requirements for cloud storage network, a new Cloud Storage-Data Integrity Verification (CS-DIV) protocol was proposed. The clients uploaded files and tags to the servers and then did random check; the servers returned proofs and the clients judged the result. This protocol could not only ensure the integrity of data in the cloud storage effectively, but also resist the cheat from the un-trusted servers and the attack from the malicious clients, and then improved the reliability and stability of the whole cloud storage system. The simulation experimental results show that the proposed protocol realizes the protection of data integrity at low cost of storage, communication and delay.