中国物理B ›› 2022, Vol. 31 ›› Issue (3): 34205-034205.doi: 10.1088/1674-1056/ac1b87

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Color-image encryption scheme based on channel fusion and spherical diffraction

Jun Wang(王君)1,†,‡, Yuan-Xi Zhang(张沅熙)1,†, Fan Wang(王凡)1, Ren-Jie Ni(倪仁杰)1, and Yu-Heng Hu(胡玉衡)2   

  1. 1 Sichuan University, School of Electronics and Information Engineering, Chengdu 610065, China;
    2 Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
  • 收稿日期:2021-05-16 修回日期:2021-08-01 接受日期:2021-08-07 出版日期:2022-02-22 发布日期:2022-02-24
  • 通讯作者: Jun Wang E-mail:jwang@scu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. U1933132) and the Chengdu Science and Technology Program, Sichuan Province, China (Grant No. 2019-GH02-00070-HZ).

Color-image encryption scheme based on channel fusion and spherical diffraction

Jun Wang(王君)1,†,‡, Yuan-Xi Zhang(张沅熙)1,†, Fan Wang(王凡)1, Ren-Jie Ni(倪仁杰)1, and Yu-Heng Hu(胡玉衡)2   

  1. 1 Sichuan University, School of Electronics and Information Engineering, Chengdu 610065, China;
    2 Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
  • Received:2021-05-16 Revised:2021-08-01 Accepted:2021-08-07 Online:2022-02-22 Published:2022-02-24
  • Contact: Jun Wang E-mail:jwang@scu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. U1933132) and the Chengdu Science and Technology Program, Sichuan Province, China (Grant No. 2019-GH02-00070-HZ).

摘要: A secure encryption scheme for color images based on channel fusion and spherical diffraction is proposed in this paper. In the proposed encryption scheme, a channel fusion technology based on the discrete wavelet transformation is used to transform color images into single-channel grayscale images, firstly. In the process of transformation, the hyperchaotic system is used to permutate and diffuse the information of red—green—blue (RGB) channels to reduce the correlation of channels. Then the fused image is encrypted by spherical diffraction transform. Finally, the complex-valued diffraction result is decomposed into two real parts by the improved equal module decomposition, which are the ciphertext and the private key. Compared with the traditional color image encryption schemes that encrypt RGB channels separately, the proposed scheme is highly secure and robust.

关键词: channel fusion, hyper-chaotic system, asymmetric encryption, spherical diffraction

Abstract: A secure encryption scheme for color images based on channel fusion and spherical diffraction is proposed in this paper. In the proposed encryption scheme, a channel fusion technology based on the discrete wavelet transformation is used to transform color images into single-channel grayscale images, firstly. In the process of transformation, the hyperchaotic system is used to permutate and diffuse the information of red—green—blue (RGB) channels to reduce the correlation of channels. Then the fused image is encrypted by spherical diffraction transform. Finally, the complex-valued diffraction result is decomposed into two real parts by the improved equal module decomposition, which are the ciphertext and the private key. Compared with the traditional color image encryption schemes that encrypt RGB channels separately, the proposed scheme is highly secure and robust.

Key words: channel fusion, hyper-chaotic system, asymmetric encryption, spherical diffraction

中图分类号:  (Imaging and optical processing)

  • 42.30.-d
42.30.Va (Image forming and processing) 42.40.My (Applications) 42.40.Kw (Holographic interferometry; other holographic techniques)