A method for deduplication of ciphertext images in a secure cloud environment, cloud server

Abstract

The invention belongs to the technical field of image deduplication, and discloses a method for deduplication of ciphertext images in a safe cloud environment and a cloud server, which divides images in a database into blocks and calculates feature values ​​of image blocks, and uses any fast The symmetric encryption algorithm encrypts the image blocks and eigenvalues; uploads the encrypted image blocks, the sequence matrix of the image blocks, and the encrypted eigenvalues ​​to the cloud server, and the server side performs the deduplication operation of the ciphertext image; if other authorized users upload again For images, encrypted image blocks and encrypted feature values ​​need to be sent to the cloud server, and the cloud server performs retrieval operations in the ciphertext image database, and decides to store image blocks or perform deduplication according to whether there are image block feature values ​​that are the same or within the set threshold range . On the basis of traditional image deduplication, the present invention realizes the safe deduplication of ciphertext images, and realizes the deduplication of different images, which can achieve the expected security goal and improve storage efficiency while ensuring accuracy .

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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