A fuzzy multi-keyword searchable encryption method based on synonym set

Abstract

The invention belongs to the field of computer cryptography, in particular to a fuzzy multi-keyword searchable encryption method based on a synonym set. The technical scheme includes: organizing and coding the synonym set WordNet, which makes the keywords with similar semantics have similar coding, and can calculate the similarity degree of the keywords from the vector; Fuzzy multi-keyword searchable encryption algorithm, through which multiple keywords can be queried at one time and files with similar meanings to keywords can be queried. The method solves the problem that when the data is stored on the cloud server in the form of ciphertext, the powerful computing power of the cloud server is utilized for keyword retrieval, and the privacy of any user is not disclosed to the server. Thisnot only makes the privacy of users be effectively protected, but also greatly improves the retrieval efficiency with the help of the server.

Description

technical field [0001] The invention belongs to the field of computer cryptography, and in particular relates to a fuzzy multi-keyword searchable encryption method based on a synonym set. Background technique [0002] In recent years, with the rapid development of the network, the era of big data has arrived. As people generate more and more data every day, cloud storage technologies have also emerged, such as Amazon Simple Storage Service and domestic Baidu Cloud Disk. However, with the development of this technology, people found that when the data is outsourced to the cloud server, the user cannot control the data, which makes the user's privacy security face a huge challenge. The general solution is to encrypt the data and upload it, but you will encounter the problem of how to query the ciphertext. The easiest way is to download and decrypt the file and query it. This operation wastes a lot of network overhead due to downloading unnecessary files, and also wastes a lot...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of searchable encryption in the cloud environment, domestic and foreign personnel have carried out in-depth research. Most of the existing solutions are aimed at precise keyword retrieval, which cannot meet daily needs. In recent years, research on the direction of fuzzy keyword retrieval has become more and more Many, but there are still reasons such as low accuracy or low efficiency

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