Attribute ciphertext efficient sharing system supporting ciphertext deduplication

Abstract

The invention relates to an attribute ciphertext efficient sharing system supporting ciphertext deduplication, the system comprises a client, a key distribution server, an authorization center and a cloud storage server, the client is in communication connection with the key distribution server, the authorization center and the cloud storage server, the key distribution server is in communication connection with the client, and the cloud storage server is in communication connection with the client. The authorization center is in communication connection with the client and the cloud storage server, the cloud storage server is in communication connection with the client and the authorization center, and the system carries out fuzzy mapping on attributes in an attribute set through a preset attribute set fuzzy strategy, so that the safety of the system and user attributes is protected; and the problem of system user privacy disclosure is solved by adopting a self-control object technology, a cloud storage server adopts a tree structure storage mode, a user can obtain all ciphertext data which can be decrypted only by performing an access request once, the ciphertext obtaining time is shortened, efficient ciphertext sharing is realized, data redundancy is eliminated by utilizing a deduplication technology, storage space is saved, and storage overhead is reduced.

Description

technical field [0001] The invention relates to the fields of cloud computing and safe data sharing, in particular to an efficient attribute ciphertext sharing system supporting ciphertext deduplication. Background technique [0002] In the Internet era, due to the massive growth of global data, cloud computing is also developing rapidly. As one of the important roles in cloud computing, cloud storage service has become a key way for users to outsource data. Among them, cloud sharing technology is an important method of information interaction, which greatly facilitates users to authorize data sharing. In recent years, data security issues have frequently occurred and user data information has been frequently leaked, and information security has become the focus and hot spot of research. [0003] In the prior art, the authenticity and security of the data sharing system and user attributes cannot be protected, and there will be duplication of storage when storing data in th...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the authenticity and security of the data sharing system and user attributes cannot be protected, and there will be duplication of storage when storing data in the data sharing system, resulting in data redundancy and waste of storage resources

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