Open AccessElectro-optic chaos system with time delay signature concealment based on XOR operation and multi-bit PRBS
Author(s) -
Zou Guoyang,
Hongxiang Wang,
Yuefeng Ji
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.416768
Subject(s) - pseudorandom binary sequence , computer science , pseudorandom number generator , algorithm , sequence (biology) , entropy (arrow of time) , chaos (operating system) , signature (topology) , permutation (music) , binary number , mathematics , physics , arithmetic , geometry , computer security , quantum mechanics , biology , genetics , acoustics
A novel chaos system with XOR operations and multi-bit PRBS is proposed to improve the sequence complexity and the security of the classic electro-optic intensity chaos system. Through the bifurcation diagram and permutation entropy analysis, the PE can be increased to 0.99. The key space is enlarged because additional DSP parameters and PRBS are introduced. The impacts of ADC/DAC characteristics and PRBS characteristics are analyzed in detail. The simulation results show that the time delay signature can be concealed with the appropriate DSP parameters.