Method and system for designing searchable encrypted cloud disc with fuzzy semantics

Abstract

The invention relates to a method and a system for designing a searchable encrypted cloud disc with fuzzy semantics. The method comprises the following steps: firstly, inputting a key pair to encrypt a file which is needed to be uploaded by a user through a client side; extracting keywords of the encrypted file, and carrying out semantic extension to build a synonym set; secondly, building a safety index to the built synonym set by a bloom filter, and uploading the safety index to a cloud storage server side; generating a keywords trap door according to the key input by the user by the client side, and submitting the trap door to the cloud storage server side; finally, searching for a corresponding file by the safety index according to the keywords trap door submitted by the user by the cloud storage server side, and returning the file back to the client side; decrypting the file returned by the cloud storage server side through the key pair by the client side. The method and the system are mainly used for providing the synonyms semantic fuzziness search function for the information search of the cipher text file, and supporting the search of many keywords, so that the file can be updated with higher efficiency.

Description

technical field [0001] The present invention is mainly applied to the field of searchable encrypted cloud disks, especially a method and system for designing semantically fuzzy searchable encrypted cloud disks. Background technique [0002] With the development of cloud computing, the computing and storage functions of traditional computers are transferred to cloud servers, effectively reducing users' computing overhead and storage costs. 360 cloud disk, Baidu cloud disk and other network storage services directly store documents in cloud storage servers, so that cloud server administrators and external attackers can directly or indirectly access user data, especially for some sensitive data. After the user stores the data in the cloud server, he loses direct control over the data, which may lead to the leakage and abuse of the user's personal privacy data. [0003] After the data is encrypted and stored in the cloud storage server, neither the cloud server administrator no...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a semantically fuzzy searchable encrypted cloud disk design method and system that solves the problems of existing searchable encryption technologies such as inability to complete semantic fuzzy search, low update efficiency, and low efficiency of multi-keyword search.

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