Abstract

The security of medical image transmission in telemedicine is very important to patients’ privacy and health. A new asymmetric medical image encryption scheme is proposed. The medical image is encrypted by two spiral phase masks (SPM) and the lower–upper decomposition with partial pivoting, where the SPM is generated from the iris, chaotic random phase mask, and amplitude truncated spiral phase transformation. The proposed scheme has the following advantages: First, the iris is used for medical image encryption, which improves the security of the encryption scheme. Second, the combination of asymmetric optical encryption and three-dimensional Lorenz chaos improves the key space and solves the linear problem based on double-random phase encoding. Third, compared with other encryption schemes, the proposed scheme has advantages in occlusion attacks, key space, correlation, and information entropy. Numerical simulation and optical results verify the feasibility and robustness of the encryption scheme.

© 2020 Optical Society of America

Optical image encryption based on biometric keys and singular value decomposition

Shan Tao, Chen Tang, Yuxin Shen, and Zhenkun Lei
Appl. Opt. 59(8) 2422-2430 (2020)

Optical double-image cryptosystem based on generalized singular value decomposition and five-dimensional hyperchaotic maps

Liao Zhang, Chen Tang, Yuxin Shen, and Rui Han
Appl. Opt. 62(3) 665-674 (2023)

Optical asymmetric cryptosystem for multi-image in cyan–magenta–yellow–black color space

Yuxin Shen, Chen Tang, Lixiang Zhou, and Zhenkun Lei
Appl. Opt. 59(7) 1854-1863 (2020)

Optical single-channel cryptosystem based on the discrete wavelet transform and the chaotic standard map for multi-image

Yuxin Shen, Chen Tang, Lixiang Zhou, and Zhenkun Lei
Appl. Opt. 59(30) 9558-9567 (2020)

Optical color image encryption based on chaotic fingerprint phase mask in various domains and comparative analysis

Yonggang Su, Wenjun Xu, Jie Zhao, Lei Chen, and Xiaoyan Tian
Appl. Opt. 59(2) 474-483 (2020)