Triple-image visually secure encryption scheme based on newly designed chaotic map and parallel compressive sensing
School of Information Science and Technology, Dalian Maritime University, 116026, Da’lian, China
2 School of Computer Science and Engineering, Sun Yat-Sen University, 511400, Guangzhou, China
3 Guangxi Key Lab of Multi-Source Information Mining & Security, Guangxi Normal University, 541004, Guilin, China
Accepted: 30 January 2023
Published online: 16 February 2023
This paper proposes a novel triple-image visually secure encryption algorithm based on a newly designed chaotic map and parallel compressive sensing (PCS). The discrete wavelet transform (DWT) is used to first decompose the three gray plain images. Next, dynamic Josephus scrambles the coefficient matrices and the partial Hadamard matrix compresses them. Finally, a reversible matrix encoding-based embedding approach is applied to embed the ciphertext information into a color carrier image to create a visually meaningful cipher image. To improve execution efficiency without affecting the security performance, a novel one-dimensional (1D) chaotic system is designed and applied to compression, encryption, and embedding stages. Most existing visual encryption schemes encrypt and embed only a single image. However, in our scheme, three gray images are encrypted and embedded into a single color carrier image at the same time, better meeting the requirements of the big data era and improving encryption efficiency. The simulation results and analyses demonstrate that the proposed scheme is effective and secure.
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