Research on proof model of data holding in cloud storage

Research on proof model of data holding in cloud storage

Liu Huanan of Zhengzhou University

Cloud era, as the next generation of the IT industry architecture, cloud computing is not simply to put applications and databases into a centralized large-scale data center, but with greater flexibility, allowing arbitrary endpoints to participate in cloud service interaction, This is reflected in cloud storage services: entities that provide storage services may be the integration of a variety of providers. The new characteristics of this heterogeneous and the incomplete trustworthiness of the storage provider make the research on the data-holding proof in cloud environment become more and more important. The data-holding proof is designed to help users validate data integrity before using the outsourced data, and to avoid the economic and social losses caused by users ' use of contaminated data. The previous research work either lacks the research on the public validation of data or the data can be validated by a third party, or does not fully consider the new characteristics of cloud storage. The main work of this thesis is as follows: On the basis of analyzing the new characteristics of cloud environment compared with traditional peer-to-peer environment, this paper constructs a data-holding proof model CS-PDP for cloud storage environment. This model mainly uses the probability type verification and the Homomorphic label verification method of sampling detection, and joins a cloud storage provider Agent CSPP to assist users to interact with various heterogeneous cloud storage providers to complete the data storage and data integrity verification task. and the intermediary agent CSPP using the Trusted computing technology to build, using the trust base and the operation of the security audit log can guarantee the security and credibility of the intermediary agent to some extent. In this paper, the proposed model algorithm is analyzed theoretically and experimentally. The algorithm is correct through theoretical deduction, so long as the storage provider stores the original data of the user, it can be verified through integrity. In terms of security, the algorithm also satisfies the requirements of completeness and privacy. If the storage service provider does not store the original data and the data is certified by the authenticator to prove its ownership, the certificate of the licensee's forgery will be validated by the certifying party at a very low probability. At the same time, the user who initiates the challenge or any third party may not extract additional file information from the interactive information. The model uses probabilistic verification to make the proof time not grow with the file size, and improve the performance to some extent. The model has the effect of reducing the cost of calculation, communication and storage. In addition, the CS-PDP model supports public validation and the challenge of allowing any secondary hold validation.

Research on proof model of data holding in cloud storage