A revocable data sharing method based on fog computing

Abstract

The invention belongs to the technical field of information retrieval; and database structure thereof, and discloses a revocable data sharing method based on fog computing. text; only need to delete the conversion key of the revoked user; after the conversion key is deleted, the cloud server cannot perform partial decryption operations for the revoked user to realize the revocation of the user. When attribute revocation occurs, it is necessary to update the keys of all affected users in the system and re-encrypt the ciphertext to ensure that other users can still decrypt the ciphertext normally. The invention realizes the data access control in the data network system, has the advantages of high system access efficiency, low computing overhead, and supports dynamic user authority management, etc., and can be used in the data network to ensure the privacy data security of users and reduce the computing overhead of users. And dynamically manage user permissions in the system.

Description

technical field [0001] The invention belongs to the technical field of information retrieval; and database structure thereof, in particular to a revocable data sharing method based on fog computing. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: a data network is a communication network used to transmit data services, and its specific applications include wide area networks, telecommunication networks, vehicle networks, and energy networks. In the past ten years, with the development of science and technology such as cloud computing and cellular networks, related applications such as data networks, including vehicle networks and energy networks, have developed rapidly. However, the problem of data sharing in the data network has attracted a lot of attention. Therefore, it is necessary to propose a safe and efficient data sharing method. Existing data access control schemes based on cloud computing are not su...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: the existing data sharing method is not suitable for the outsourcing environment, and the efficiency is low in practical application; the existing revocation technology cannot realize instant attribute revocation, and the It is easy to cause system bottlenecks

[0004] The difficulty and significance of solving the above technical problems: In the outsourcing environment, the confidentiality of the data in the system needs to be guaranteed, whether it is for the cloud server or other users, the data needs to be kept confidential, which is a difficult point; in the process of revocation, it is inevitable Update operations will be performed frequently, how to improve update efficiency and reduce computing overhead is also a difficulty

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