Encrypted image safety retrieval method and retrieval system in edge environment

Abstract

The invention discloses an encrypted image safety retrieval method and retrieval system in an edge environment. A vector encryption method is adopted to encrypt the feature vector of each image; querying the feature vector of the image for encryption; respectively forming an encrypted index vector and an encrypted query vector; carrying out modular addition operation on the encrypted index vectorand the received encrypted query vector according to the query request, restoring Hamming distances between the index vector and the query vector according to a modular addition operation result, sorting the Hamming distances from small to large, and returning ciphertext images sorted in the front to a query user as a retrieval result; key distribution and ciphertext storage in an edge environmentare realized, privacy protection of an outsourcing image is facilitated, an efficient encrypted image retrieval scheme is realized, and query efficiency and query precision are high.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a secure retrieval method and retrieval system for encrypted images in an edge environment. Background technique [0002] With the development of edge computing, users with limited resources outsource massive image storage and processing tasks to edge servers. Encryption, however, the traditional encryption technology destroys the relationship between image and ciphertext, so that the image retrieval method on the plaintext cannot be applied to the ciphertext image. Based on this situation, there are already existing retrieval technologies for encrypted images, but these technologies still have the problems of low retrieval accuracy and low retrieval efficiency for the retrieval applications of encrypted images in marginal environments. [0003] In the paper published by Xia Z et al., they proposed a content-based image retrieval method with efficient privacy protection i...

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to solve the problem of complex image feature encryption algorithm and low retrieval accuracy in the existing encrypted image retrieval technology, and propose an encrypted image security method in the edge environment Retrieval method and retrieval system, the method is used to query the encrypted image stored by the user on the cloud server and the encrypted index stored by the edge server in the edge environment, safely perform similar image query, and obtain high retrieval accuracy

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