The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 2022
Filed:
Feb. 10, 2021
Huazhong University of Science and Technology, Wuhan, CN;
Peng Xu, Wuhan, CN;
Tianyang Chen, Wuhan, CN;
Yubo Zheng, Wuhan, CN;
Hai Jin, Wuhan, CN;
Wei Wang, Wuhan, CN;
Huazhong University of Science and Technology, Wuhan, CN;
Abstract
The present invention relates to a method and a system for robust, searchable, symmetrical encryption, the method comprising: during initialization, having a retrieval server perform retrieval on stored ciphertext information according to a searchable ciphertext and retrieval trapdoor information (Cnt, K, Loc) sent by a client, wherein, the retrieval server acquires a last received first ciphertext set Cfrom a ciphertext database CDB just before the present retrieval according to a retrieval key K and an encryption counter Cntsent by the client, acquiring a second ciphertext set Cin a retrieval request history from a cache ciphertext database GRP according to a cache ciphertext index Loc, and merging the first ciphertext set Cand the second ciphertext set Cto form a retrieval set, and sending it to the client for decryption. The present invention is able to improve retrieval performance of searchable symmetrical encryption algorithm with robust forward and backward secrecy and to make searchable symmetrical encryption algorithm more practical.