Abstract

In this paper, an optical implementation of a novel asymmetrical cryptosystem combined with D-H secret key sharing and triple DES is proposed. The proposed optical cryptosystem is realized by performing free-space interconnected optical logic operations such as AND, OR and XOR which are implemented in Mach-Zehnder type interferometer architecture. The advantage of the proposed optical architecture provides dual outputs simultaneously, and the encryption optical setup can be used as decryption optical setup only by changing the inputs of SLMs. The proposed cryptosystem can provide higher security strength than the conventional electronic algorithm, because the proposed method uses 2-D array data, which can increase the key length surprisingly and uses 3DES algorithm, which protects against “meet in the middle” attacks. Another advantage of the proposed asymmetrical cryptosystem is that it is free to change the user’s two private random numbers in generating the public keys at any time. Numerical simulation and performance analysis verify that the proposed asymmetric cryptosystem is effective and robust against attacks for the asymmetrical cipher system.

© 2015 Optical Society of Korea

Optical asymmetric JTC cryptosystem based on binary phase modulation and image superposition–subtraction operation

Yijie Liu, Xueju Shen, Bing Zhou, Jie Liu, Jianjun Cai, Xun Liu, and Yue Cheng
Appl. Opt. 61(29) 8711-8729 (2022)

Discussion and a new attack of the optical asymmetric cryptosystem based on phase-truncated Fourier transform

Xiaogang Wang, Yixiang Chen, Chaoqing Dai, and Daomu Zhao
Appl. Opt. 53(2) 208-213 (2014)

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)

Enhancing the Security of Free-Space Optical Communications With Secret Sharing and Key Agreement

Ning Wang, Xuegui Song, Julian Cheng, and Victor C. M. Leung
J. Opt. Commun. Netw. 6(12) 1072-1081 (2014)

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)