Revocable data sharing method based on fog calculation

Abstract

The invention belongs to the field of information retrieval and the technical field of its database structure, and discloses a revocable data sharing method based on fog calculation. When a user revocation occurs, it is not necessary to update the keys of other unrevoked users and re-encrypt the ciphertext, only the conversion key of the revoked user needs to be deleted; after the conversion key is deleted, the cloud server cannot perform partial decryption operations for the revoked user, thereby realizing the user's revocation. When an attribute revocation occurs, the keys of all affected users in the system needs to be updated and the ciphertext is re-encrypted to ensure that other users may still decrypt the ciphertext as usual. The invention realizes the data access control in the data network system, has the advantages such as high system access efficiency, low computational cost, and support for dynamic user rights management, and may be used for protecting the privacy data of the user in the data network, reducing the calculation cost of the user, and dynamically managing the authority of the user 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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