Encryption and decryption method of ofdm-pon system based on cellular neural network
A technology of OFDM-PON and neural network, which is applied in the field of optical communication encryption, can solve the problems of insufficient chaos, low dimension of chaotic system, and theft of transmission data, etc. It achieves a high degree of hardware implementation, and is easy to implement VLSI and parallel processing. signal effect
Active Publication Date: 2021-07-27
HANGZHOU DIANZI UNIV
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Although the above schemes realize the encryption of physical layer data, the chaotic system dimension of these encryption schemes is low, and the degree of chaos is not enough, so the randomness of the generated chaotic sequence will be greatly reduced, which seriously affects the security of the encryption system
[0004] In addition, most of the current physical layer encryption schemes based on OFDM-PON cannot resist selective plaintext attacks, and the transmitted data is easily stolen by illegal intruders, and the current physical layer encryption technology generally encrypts the transmitted information, while the The encryption of the key is rarely involved, and the key is generally a static key, and the receiving end uses a fixed key to encrypt and decrypt information, so that the key is easily stolen by illegal intruders in the long run
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[0049] In order to illustrate the embodiments of the present invention more clearly, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.
[0050] The invention uses the pseudo-random sequence as the data stream of the original signal to verify the effect of the encryption system.
[0051] The encryption method of the OFDM-PON system based on the cellular neural network of the present invention, the process is as follows figure 1 As shown, the OFDM-PON system includes a chaotic signal optical transmitting module, optical transmission module and signal receiving module based on the cellular neural network. The specific encryption method is: firstly, the input or...
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The invention belongs to the technical field of optical communication encryption, and specifically relates to an encryption and decryption method of an OFDM-PON system based on a cellular neural network; the encryption method includes: constructing a dynamic key set of a cellular neural network, and summing and moduloing input digital signals , use the obtained value as the index value of the dynamic key set of the cellular neural network; determine the initial value of the cellular neural network through the index value, so as to generate the corresponding chaotic sequence as the synchronization sequence of the OFDM-PON system; use the cellular neural network to generate The chaotic sequence and index value encrypt the original data against selected plaintext attacks, and then enter the optical fiber transmission after OFDM modulation and electro-optical modulation conversion. The invention utilizes the chaotic characteristics of the cellular neural network to combine multiple initial values into a key set, randomly selects the key each time to improve the dynamic characteristics of the key, and utilizes the randomness of the sent plaintext to construct an anti-chosen plaintext attack encryption scheme , high security.
Description
technical field [0001] The invention belongs to the technical field of optical communication encryption, and in particular relates to an encryption and decryption method of an OFDM-PON system based on a cellular neural network. Background technique [0002] In recent years, with the continuous improvement of social information and the emergence of emerging services such as cloud computing, high-definition video, and virtual reality, end users have higher and higher requirements for access bandwidth, access capacity, and access service capabilities. Passive Optical Network (PON), as a terminal access technology of Fiber To The Home (FTTH), is considered to be one of the best solutions for solving broadband optical access problems at low cost. Among them, PON (OFDM-PON) based on Orthogonal Frequency Division Multiplexing (OFDM), due to its inherent advantages, such as easy expansion of channel capacity, high spectral efficiency, and strong anti-multiple The ability to avoid p...
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IPC IPC(8): H04L9/00H04B10/85G06N3/063
CPCG06N3/063H04B10/85H04L9/001
Inventor毕美华卓先好胡丽琴俞嘉生杨国伟周雪芳胡淼李齐良
OwnerHANGZHOU DIANZI UNIV