Ciphertext data sharing system in cloud computing environment

Abstract

The invention provides a ciphertext data sharing system in a cloud computing environment, used for solving the technical problems of high attribute cancellation cost and low user data sharing efficiency in the existing ciphertext data sharing system. The ciphertext data sharing system comprises an authorization module, a data owner module, a user module and a cloud service provider module, wherein the authorization module comprises multiple attribute authority modules; the various attribute authority modules have the hierarchical or parallel relationship; the data owner module comprises a construction XACML access strategy module used for generating a strategy file; the user module comprises a private key decryption module and a CP-ABE decryption module; the private key decryption module is used for decrypting AES key cyphertext data of private domain users; and the CP-ABE decryption module is used for decrypting AES key cyphertext data of public domain users. The ciphertext data sharing system provided by the invention can be used for information sharing in the data exchange field in the cloud computing environment.

Description

technical field [0001] The invention belongs to the technical field of network and information security, realizes a ciphertext data sharing system in a cloud computing environment, and can be used for information sharing in the field of data exchange in a cloud computing environment. Background technique [0002] With the rapid development of Internet technology, users began to participate in the production and editing of information, which caused the exponential growth of the user's personal data, resulting in a gradual increase in the cost of data storage and management. When personal PCs are not enough to support the user's business requirements, cloud computing Technology emerges accordingly, and the gradual evolution of cloud computing itself is gradually developed by inheriting some previous research results of grid computing, utility computing, and software as a service. Cloud computing is a computing model based on the network. Its core is to provide users with scala...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and propose a ciphertext data sharing system in a cloud computing environment, which is used to solve the problem of high attribute revocation cost and user data sharing efficiency existing in the existing ciphertext data sharing system low technical issues

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