Security Improvement for OFDM-PON via DNA Extension Code and Chaotic Systems

Abstract

In the paper, a deoxyribonucleic acid (DNA) extension code with 3-bit binary streams is proposed to encrypt the downlink data for orthogonal frequency division multiplexing passive optical network (OFDM-PON). It has 8 bases to make up 4 pairs of complementary codes. And it can obtain 384 matching rules, which greatly improves the randomness of matching. Here, two DNA addition operation rules are also proposed to encrypt the data. DNA extension rules can reduce half coding operations. Three 1-dimensional (1-D) chaotic systems are used to encrypt the code and control the rules. The encryption method based on the uplink streams from optical network units (ONUs) makes the security of downlink signals not just depending on the security of chaotic systems. Finally, a 22.06 Gb/s DNA extension code encryption signal is transmitted through a back-to-back (BTB) system and a 25-km standard single-mode fiber (SSMF). The proposed method not only improves the security but also reduces the computational complexity. The experimental results show that the proposed method has the ability to resist optical channel response and fiber nonlinearity, which is a promising candidate for solving the security enhancement in access networks.INDEX TERMS DNA extension code, OFDM-PON, uplink stream, 1-D chaotic system, security enhancement.

Physical Layer Dynamic Key Encryption in OFDM-PON System Based on Cellular Neural Network

“…Orthogonal frequency division multiplexing passive optical networks (OFDM-PON) are considered to be one of the best candidates for providing high-speed optical fiber transmission for next-generation access networks, which is due to its advantages of high spectrum efficiency, flexible resource allocation and strong anti-dispersion ability [1][2][3][4]. However, owing to the broadcast structure for the downstream transmission of PON, the transmitted data is vulnerable to eavesdropping via an illegal optical network unit (ONU).…”

A Quantum Chaotic Image Cryptosystem and Its Application in IoT Secure Communication

“…Digital images have some unique properties, such as strong correlation between adjacent pixels and high redundancy. In terms of real-time encryption, traditional cryptosystems such as DES, IDEA and AES face challenges [4][5][6]. Chaos owns the characteristics of high sensitivity to control parameters and initial values, ergodicity of modes, and dense periodic points.…”

“…It has many similarities to the confusion and diffusion in Shannon's cryptographic theory [7][8][9][10][11]. Thus, image encryption technology based on chaos theory has attracted much attention [2,3,5,12,13]. Furthermore, the rapid development of Internet of Things applications makes its communication and transmission security issues more attractive [7,14,15].…”

“…Furthermore, the rapid development of Internet of Things applications makes its communication and transmission security issues more attractive [7,14,15]. Therefore, it is very necessary to implement effective security and confidentiality technology for the transmission in IoT [5,16,17].…”

“…For the image cryptosystems, the "permutation-diffusion" is widely used as the most basic algorithm structure [4,5,12,13]. In 2014, Ref.…”