Encrypted image reversible information hiding method based on integer wavelet transform

Abstract

The invention discloses an encrypted image reversible information hiding method based on integer wavelet transform, and belongs to the field of information hiding and image encryption, and the methodcomprises the steps: firstly generating a position sequence, an encryption sequence and a scrambling sequence through employing a proposed chaotic system; performing integer wavelet transform on the image to obtain four components, hiding data in diagonal components according to a position sequence, encrypting approximate components through an encryption sequence, and finally performing position scrambling on all the components by using a scrambling sequence; in the encryption process, by researching the reconstruction process of integer wavelets, providing an image encryption method based oninteger wavelet transform and the problem that pixels overflow when encrypted wavelet components are reconstructed is mainly solved. Simulation experiment results show that the scheme has better performance, including higher embedding rate, safer secret images, visual quality of decrypted and extracted images and anti-attack performance, and has practical value.

Description

technical field [0001] The invention belongs to the fields of information hiding and image encryption, and in particular relates to a method for reversible information hiding of encrypted images based on integer wavelet transform. Background technique [0002] Reversible information hiding focuses on reversibility. While protecting the confidentiality of information, it ensures that the extracted data and extracted images are lossless. At the same time, under the growing demand for information security, it aims at the growing demand for digital security in the fields of confidential communication and medical information transmission. The sequence generated by the chaotic system has a good random distribution, and it is used to encrypt the image to ensure the security of the hidden information in the encrypted image. The encryption method in the wavelet domain can improve the unpredictability of the scheme and make the ciphertext image not easy to be cracked. The nature of ...

AI Technical Summary

Problems solved by technology

But it has a low payload and is less robust against common non-geometric attacks

The document "S.Yiand Y.C.Zhou, Binary-block embedding for reversible data hiding in encrypted images" (Signal Processing, Article vol.133, pp.40-51, Apr 2017) proposed a reversible encrypted image based on a binary embedding method Information hiding algorithm, the maximum load of this scheme is relatively high, and the visual effect of the information embedding method is better, but the peak signal-to-noise ratio of the payload when embedding large information is not high

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