Ciphertext image deduplication method used in cloud environment and cloud server

Abstract

The invention belongs to the technical field of image deduplication and discloses a ciphertext image deduplication method used in the cloud environment and a cloud server. An image in a database is partitioned, characteristic values of image blocks are calculated, and the image blocks and the characteristic values are encrypted with any one rapid symmetrical encryption algorithm; the encrypted image blocks, a sequence matrix of the image blocks and the encrypted characteristic values are uploaded to the cloud server, and ciphertext image deduplication operation is executed by the server; if other authorized users upload the image again, the encrypted image blocks and the encrypted characteristic values are required to be sent to the cloud server, the cloud server performs retrieval operation in an encrypted image library, and storage of the image blocks or deduplication is decided according to the fact that whether the same characteristic values of the image blocks or the characteristic values of the image blocks in a set threshold value range exist. On the basis of conventional image deduplication, safe deduplication of ciphertext images is realized, deduplication of different images is realized, the expected safety purpose is achieved, and besides, the storage efficiency is improved under the condition that the accuracy is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of image deduplication, and in particular relates to a method for deduplication of ciphertext images in a safe cloud environment and a cloud server. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: With the popularization of smart terminal devices, the rapid development of mobile Internet and social networks, and the gradual maturity of large-scale storage and processing technologies, the data generated by enterprise users and individual users in recent years The volume is growing exponentially, and research shows that by 2020, the amount of data we will generate will exceed 40ZB. Among these data, multimedia data occupies a large proportion, and multimedia data storage overhead is high and processing is difficult. Therefore, how to manage massive multimedia data has become a serious problem for computer systems. Research on multimedia databa...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problem existing in the existing technology is that the image deduplication method in the cloud environment is still under research, and the problem existing in the existing technology is that the deduplication rate is low when realizing accurate deduplication, and the deduplication rate is low when realizing deduplication. Deduplication may result in the loss of user files

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