Abstract
The developments of cloud computing technology and reliable modern network have been motivating users to store data in cloud servers and rendering security of cloud computing a focus of attention. While data security can be ensured by data encryption technology, data integrity is secured by certain checking algorithm. A verification method of data integrity which can be performed repeatedly is proposed after the comprehensive analysis of the feature of static data stored in a cloud server and its security requirements. The client preprocesses the data file according to the times that the data is required checking, and then upload the data file with check metadata to cloud server, so that the client can spot check the data within limited times and judge the data integrity. Through the analysis of security and performance, we show that this scheme can efficiently verify the data integrity and resist the replay attack and MitM (Man-in-the-middle attack).
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