A Sensitive Image Encryption Algorithm Based on a Higher-Dimensional Chaotic Map and Steganography

Publication Date

1-1-2022

Document Type

Article

Publication Title

International Journal of Bifurcation and Chaos

Volume

32

Issue

1

DOI

10.1142/S0218127422500043

Abstract

Chaotic maps have been widely used in image encryption due to their complexity, pseudorandomness and high sensitivity to initial values. In this paper, an image encryption algorithm based on a 4D chaotic map and steganography is proposed. The algorithm consists of two rounds of encryption and one operation of embedding hash. In the first round of encryption, the hash value of plaintext image is used to control the generation of chaotic sequences, which makes the encryption algorithm highly relevant to the content of the image. Then, the hash value is embedded into the intermediate image according to the idea of steganography. In the second round of encryption, the image is encrypted under the control of another set of chaotic sequences to hide the hash value and further enhance the security of the algorithm. Different from other algorithms, our algorithm does not need to additionally transmit the hash value to the decryptor through a special channel. It has good availability and adaptability. Experimental results and security analysis demonstrate that the algorithm has high security performance and can resist various attacks.

Keywords

Chaos, Hash embedding, Image encryption, Sensitive encryption, Steganography

Department

Computer Engineering

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