Method for hiding reversible information of security encryption domain based on high-level overturn prediction

Abstract

The invention discloses a method for hiding reversible information of a security encryption domain based on high-level overturn prediction. The high-level overturn prediction method is used for only testing original images and not changing values and positions of pixels, so that a general image exclusive OR / AND scrambling operation can be applied to encryption of images, and meanwhile, protectionof pixel values and pixel positions can be realized, and the security of the encrypted images is improved; According to the testing method based on the high-level overturn prediction disclosed by theinvention, correlation of the images is fully utilized, so that the steganographic capacity is effectively improved; at a receiving end, a receiver only needs an image encryption secret key and does not need a steganographic secrete key, decryption images identical to the original images and plaintext images which contain additional information and are similar to the original images can be acquired; and on the other hand, the receiver only needs an information steganographic secrete key and does not need the image encryption secrete key, the same additional information can be extracted separately from a plaintext domain containing the additional information and a ciphertext domain. According to the method disclosed by the invention, realization of an algorithm is simple, the security is high, and the steganographic capacity is large.

Description

technical field [0001] The invention relates to a reversible information hiding method in an image encryption domain. Background technique [0002] With the development of network and cloud services, it is difficult for digital image data to be stored in the cloud in clear text to meet users’ privacy protection needs. Therefore, uploading encrypted versions of digital image data has become an effective means of user privacy protection. On the other hand, cloud service providers need to hide additional information in encrypted digital images to facilitate the management of ciphertext digital images. Taking into account the needs of user privacy protection and ciphertext image management, image encryption domain reversible data hiding (RDH-EI: Reversible Data Hiding in Encrypted Image) technology has attracted more and more attention. [0003] At the receiving end, according to actual needs, the additional information extractor can losslessly extract additional information fr...

AI Technical Summary

Problems solved by technology

Among them, the document 1 algorithm modifies the value of the original pixel based on the traditional RDH algorithm before encryption; the document 2 algorithm does not need to modify the original image before encryption, but its embedding capacity is small, and more importantly, its block XOR-block scrambling The encryption method does not change the positional relationship of adjacent pixels, retains some statistical characteristics, and has potential safety hazards; although the algorithm in Document 3 does not involve the traditional RDH algorithm, in order to achieve complete reversibility, the special image encryption method designed requires the user to encrypt Before classifying pixels and resetting their positions, the computational complexity is high

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