Strategy for Attacking the Key Parameters of Electro-Optic Self-Feedback Phase Encryption System
Lihong Zhang,
Wenkun Huang,
Bin Tang,
Ying Luo,
Yuehua An,
Yuncai Wang,
Yuwen Qin,
Zhensen Gao
Affiliations
Lihong Zhang
Guangdong Provincial Key Laboratory of Information Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
Wenkun Huang
Guangdong Provincial Key Laboratory of Information Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
Bin Tang
Guangdong Provincial Key Laboratory of Information Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
Ying Luo
Guangdong Provincial Key Laboratory of Information Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
Yuehua An
School of Optoelectronic Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China
Yuncai Wang
Guangdong Provincial Key Laboratory of Information Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
Yuwen Qin
Guangdong Provincial Key Laboratory of Information Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
Zhensen Gao
Guangdong Provincial Key Laboratory of Information Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
In this paper, we propose a method for cracking the key parameters of an electro-optic self-feedback temporal optical phase encryption system and experimentally demonstrate the feasibility of the scheme. By scanning a tunable dispersion compensation (TDC) module at the receiver, the time delay signature (TDS) of an encrypted signal can be exposed, making it possible to extract other key parameters of the system and reconstruct a decryption setup. The TDS characteristics for three typical modulation formats are investigated, revealing that while such an encryption system is secure against power detection attack, there is a risk of TDS leakage. The findings can guide the design of advanced optical encryption schemes with TDS suppression for security enhancement.
