Cloud Data Sharing Method Based on Block Chain to Realize Data Tampering Resistance and User Collusion

Abstract

In recent years, with the application of cloud more and more widely, the problem of privacy leakage of cloud sharing data is constantly occurring at home and abroad. Privacy leakage in cloud data sharing has become the focus of attention, and relevant solutions are constantly proposed. Most of the existing schemes are composed of a single shareholder 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 protect the privacy of the data, such as malicious tampering of the shared data, collusion between malicious users, and collusion between users and cloud service providers. The invention provides a cloud data sharing method based on block chain for realizing data tampering prevention and user conspiracy. The method realizes that the data is not tampered with by malicious users when sharing by adopting the method of public bookkeeping and intelligent contract in the block chain,and realizes the confidentiality of the shared data by adopting a (p, t) threshold Paillier cryptosystem, thereby avoiding the problem that malicious users collude to steal the 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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