Reversible information hiding method based on addition homomorphic encryption and multi-high-order embedding

Abstract

The invention provides a reversible information hiding method based on addition homomorphic encryption and multi-high-bit embedding, and belongs to the technical field of information processing, and the method comprises the following steps: firstly, partitioning an image, then carrying out addition homomorphic encryption on each block by adopting a secret key, scrambling the encrypted image blocks, and finally, carrying out encryption on the scrambled image blocks; and analyzing the actual embedding capacity of each block in the encrypted and scrambled image blocks, generating a label map, performing secret information embedding on each block according to the content of the label map to obtain an encrypted image with embedded information, extracting the secret information, and performing lossless recovery on the original image. According to the method, the security is ensured, the embedding capacity is greatly improved, and on the basis of encryption, Arnold scrambling is continued, so that the security of the image content is further improved, the embedding capacity is greatly improved, and lossless recovery of the image content and error-free extraction of secret information are ensured. And by utilizing the homomorphic encryption characteristic, the embedding capacity of the reversible information hiding algorithm is greatly improved.

Description

technical field [0001] The invention relates to the technical field of information processing, in particular to a reversible information hiding method based on additive homomorphic encryption and multi-high bit embedding. Background technique [0002] Reversible information hiding technology refers to embedding private data into our common media media, such as text, images, and videos, and then extracting private data without error and restoring media content without loss. Due to such characteristics, reversible information hiding technology is widely used in medical, financial and military fields, among which the technology of information hiding on images has aroused extensive interest of researchers. [0003] The early reversible information hiding technology was mainly applied in the plaintext domain. After the information is embedded in the image, it is impossible to detect the secret information embedded in the image without corresponding statistical analysis. However,...

AI Technical Summary

Problems solved by technology

[0004] The existing technology with relatively high embedding capacity generally adopts the framework of reserving embedding space before encryption, which is less secure than the embedding space reserved after encryption

However, the existing algorithms using the VRAE framework generally use the early methods based on histogram translation and difference expansion because of the lack of correlation between the encrypted image pixels, and the embedding capacity is low.

Moreover, due to the lack of correlation between the encrypted image pixels, the existing reversible information hiding algorithm using the VRAE framework cannot completely restore the image content losslessly.

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