Electro-optic chaotic system based on time delay feature hiding and key space enhancement based on chaotic post-processing

Author:

Gong XiaoYang1,Zou Guoyang1,Wang Hongxiang1ORCID,Ji Yuefeng1ORCID,Zhang Yu2

Affiliation:

1. Beijing University of Posts and Telecommunications

2. Academy of Broadcasting Science

Abstract

To improve the output performance of the classical all-optical chaotic system and solve the security problems of its key exposure and small key space, a new chaotic system, to the best of our knowledge, based on logistic map post-processing is proposed. In terms of the general output performance of the system, the spectrum of the proposed system is flatter than the classical system. Through a bifurcation diagram and permutation entropy analysis, it is found that the output of the system is extremely complex. In terms of security, the simulation results show that, with a reasonable selection of system parameters, key hiding can be achieved under a large parameter range. Moreover, through the sensitivity analysis of logistic parameters, it can be seen that the introduction of logistic parameters can improve the key space of the system and further improve the security of the system.

Funder

National Natural Science Foundation of China

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering

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