An image interpolation space completely reversible separable ciphertext domain information hiding algorithm

Abstract

The invention provides an image interpolation space completely reversible separable ciphertext domain information hiding algorithm. The method comprises the following steps of: giving out a conditionrequired by a traversal matrix suitable for image encryption, constructing the traversal matrix by utilizing a chaotic pseudo-random number generator, carrying out a decryption algorithm of the traversal matrix and diffusion and restoration of pixels, generating an encrypted image and realizing secret information hiding in an encrypted image interpolation space; according to the invention, the matrix is traversed;, pixel diffusion and interpolation hiding can realize confidentiality of a carrier image and a secret image. The distribution of a ciphertext image histogram and a secret carrying image histogram is uniform. The image is flat, and a decoder cannot obtain the original image and the secret key information from the histogram; Attacks such as statistical characteristics of the plaintext image are well defended. The security requirement of the carrier image is met, meanwhile. The original image can be restored in a lossless mode, secret information can be extracted, watermark extraction and image decryption are independent, completely separated and exchangeable, and the method has the advantage of being high in security.

Description

technical field [0001] The invention relates to the technical field of computer information hiding, in particular to an image interpolation space completely reversible and separable ciphertext domain information hiding algorithm. Background technique [0002] Data security and privacy are one of the current hot issues, and image encryption technology has emerged as the times require, and has been greatly developed. Reversible information hiding in the ciphertext domain is an important combination of signal processing technology and information hiding technology in the encryption domain. , which can play a role of double insurance for information security in the process of data processing, especially with the promotion of cloud services, reversible information hiding in ciphertext domain is one of the research focuses to realize privacy protection in cloud environment. [0003] In terms of information hiding in the ciphertext domain, it can be roughly divided into two types: ...

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Problems solved by technology

[0004] However, there are many deficiencies in the existing ciphertext domain information hiding algorithms. The specific performance is that the reversibility of the algorithm cannot be completely guaranteed, and it is not completely reversible; the algorithm embedding rate is low and cannot meet the actual needs; some algorithms are not real The essence of information hiding in the text domain is the reversible information hiding algorithm in the plain text domain; there are few algorithms that can fully realize reversible and separable information

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