A chaotic secure access method for optical physical layer

Abstract

The invention discloses an optical physical layer chaotic secure access method. The sub-matrix division scheme of the data matrix DATA obtained after QAM modulation and OFDM sub-carrier allocation during OFDM signal transmission is set, N sub-matrices are obtained, and then M sub-matrices are set. level of chaotic encryption algorithm, so that each sub-matrix selects a level of algorithm from M levels of chaotic encryption algorithms for encryption, and obtains M N There are various encryption schemes, the complexity weight sum of each encryption scheme is calculated, and the encryption schemes are grouped according to the complexity weight sum. When the optical network unit ONU needs to access, it first determines the security level with the optical line terminal OLT. One encryption scheme is selected from the encryption schemes of the level, and after the data matrix is ​​divided, the selected encryption scheme is used to encrypt and send. The invention adopts a hierarchical encryption scheme, realizes encryption for different security requirements, and improves the efficiency of user information encryption at the same time.

Description

technical field [0001] The invention belongs to the technical field of optical access networks, and more particularly, relates to a chaotic secure access method of an optical physical layer. Background technique [0002] With the rapid development of the Internet industry, large-scale data information is generated from people's daily life, social production and institutional operations and spreads in the network. Informatization has extensively and deeply changed people's lives, improved social efficiency, and promoted economic development, but the threats and challenges brought by network security should not be underestimated. In recent years, cybersecurity incidents at the individual, corporate and even national levels have emerged one after another. Under the severe security challenges, national policies have also made clear instructions, and cybersecurity laws have been continuously improved. [0003] As an important part of network security, the access network has att...

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Problems solved by technology

[0004] Traditional optical access network security enhancement technology solutions mainly focus on upper-layer encryption, optical codec, and chaotic laser communication, but these solutions have defects such as partial data encryption, small key space, and poor synchronization performance.

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