A Reversible Information Hiding Method for Encrypted Image Based on Integer Wavelet Transform

Abstract

The invention discloses a method for reversible information hiding of an encrypted image based on integer wavelet transform, which belongs to the field of information hiding and image encryption. The method of the invention first uses the proposed chaotic system to generate a position sequence, an encryption sequence and a scrambling sequence; then the image is processed The integer wavelet transform obtains four components, hides the data in the diagonal components according to the position sequence, encrypts the approximate components through the encryption sequence, and finally uses the scrambling sequence to scramble the positions of all components; during the encryption process, by studying the integer In the process of wavelet reconstruction, an image encryption method based on integer wavelet transform is proposed, which mainly solves the problem of pixel overflow in reconstruction of encrypted wavelet components; simulation results show that this scheme has better performance, Including higher embedding rate, more secure secret images, visual quality of decrypted and extracted images, and anti-attack performance, which have 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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