Chinese Optics Letters, Volume. 20, Issue 11, 110601(2022)
Security enhancement for OFDM-UWOC system using three-layer chaotic encryption and chaotic DFT precoding Editors' Pick
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Fig. 1. Block diagram of the secure OFDM-UWOC based on three-layer chaotic encryption and chaotic DFT precoding.
Fig. 3. Experimental setup. Insets: (a) the transmitter module, (b) the water tank, and (c) the receiving module.
Fig. 4. Performance of PAPR for (a) original image data and (b) three-layer encrypted data under different conditions.
Fig. 5. BER curves of normal and illegal receiver for (a) original image data and (b) three-layer encrypted data.
Fig. 6. (a) Change 1 bit in plaintexts. (b) The difference of ciphertext change on the first 60 OFDM subcarriers.
Table 1. The Computation Complexity of Encryption Schemes
View tableView in ArticleTable 1. The Computation Complexity of Encryption Schemes
Our Scheme Ref. [ 20 ] (with DFT-S)Ref. [ 18 ]Real-valued multiplication 0 N2 0 Complex-valued multiplication M2 + N2 M2 M2 + N2 Addition M(M − 1) + N(N − 1) 3M(M − 1) + 2M × (2M − 1) + N(N − 1) M(M − 1) + N(N − 1)
Table 2. The Computation Complexity of Chaos Systems
View tableView in ArticleTable 2. The Computation Complexity of Chaos Systems
Our Chaotic Systems 7D Chaos (Ref. [ 20 ])Chaos Maps (Ref. [ 18 ])Addition 104 221 5 Multiplication 110 118 10 Sine function 0 4 2
Table 3. Parameters of the OFDM-UWOC System
View tableView in ArticleTable 3. Parameters of the OFDM-UWOC System
OFDM Parameters Values Modulation format 16-QAM Number of effective subcarriers 256 Inverse fast Fourier transform (IFFT) size 1024 Number of cyclic prefix (CP) 64 Number of subcarriers for gap near DC 8 Number of OFDM symbols 520
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Huan Deng, Zihao Du, Jianmin Xiong, Xingqi Yang, Yan Hua, Jing Xu, "Security enhancement for OFDM-UWOC system using three-layer chaotic encryption and chaotic DFT precoding," Chin. Opt. Lett. 20, 110601 (2022)
Paper Information
Category: Fiber Optics and Optical Communications
Received: Apr. 21, 2022
Accepted: May. 31, 2022
Published Online: Jul. 5, 2022
The Author Email: Jing Xu (jxu-optics@zju.edu.cn)
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