Cloud data sharing method based on block chain to realize anti-data tampering and user collusion

Abstract

In recent years, as the application of the cloud has become more and more extensive, the problems of privacy leakage of cloud shared data have continued to occur at home and abroad. Most of the existing solutions are composed of a single sharer or a specific user. However, in actual data sharing scenarios, the shared data is usually provided by multiple data owners, which brings a series of new problems to the protection of data privacy, such as malicious tampering of shared data, shared data between malicious users, etc. conspiracy, and collusion between users and cloud service providers. The present invention proposes a cloud data sharing method based on block chains to realize anti-tampering and user collusion. This method realizes that the data will not be tampered with by malicious users during sharing by adopting the method of public accounting and smart contracts in the blockchain, and at the same time adopts the (p, t) threshold Paillier cryptosystem to realize the confidentiality of the shared data, which avoids malicious users. The problem of collusion between shared data.

Description

technical field [0001] The invention relates to a cloud data sharing method based on a block chain to realize anti-tampering of data and anti-collusion of users, and belongs to the fields of cloud data sharing, data privacy, and block chains. Background technique [0002] With the rapid development of network technology and cloud computing, the amount of corporate or personal data is increasing rapidly. In order to store and share data conveniently, more and more enterprises or individuals transfer their own data storage and sharing to cloud space. Compared with traditional information sharing and communication technologies, cloud computing has low energy consumption and efficient resource sharing. specialty. However, this has brought great challenges to information security such as data loss and privacy leakage. Moreover, when data is stored in the cloud, users will have no control over their personal data at all, which becomes an important consideration to ensure the con...

AI Technical Summary

Problems solved by technology

Moreover, if this method is adopted, the system processing steps will be complicated, and it is easy to cause problems such as tampering of shared data and collusion between malicious users.

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