Abstract
Security in optical orthogonal frequency division multiplexing (OFDM)
network has traditionally been considered to be addressed in higher layers
of the network, while the physical layer is vulnerable to various attacks.
As the dramatic increase of network capacity and secret sensitivity, the issue
of physical layer security becomes more and more important. This paper proposes
a novel physical-enhanced chaotic secure strategy for optical OFDM system
based on two-dimensional (2-D) permutation. A controlled Logistic map is adopted
for the chaotic mapping. The 2-D secure algorithm jointly utilizes frequency
subcarriers and time-slots permutation to guarantee the secure of physical
layer security of optical OFDM transmission system. This method performs dynamic
permutations over frequency and time dimensions, resulting in a robust protection
on transmitted information. Experiment is performed to confirm the good effectiveness
of the proposed method.
© 2012 IEEE
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