Secure fiber-optic communication system based on Internet-accessible multipath transmission of ciphertext fragments

• DOI: 10.1364/oe.430035
• Publication Date: 2021-07-13T10:30:06Z
• Authors: Ya Jin; Yichao Qi; Yinfang Chen; Wei Chen; Wei Li; Ninghua Zhu
• Keywords: 9. Industry and infrastructure; 0103 physical sciences; 01 natural sciences

A secure fiber-optic communication system based on Internet-accessible multipath transmission of ciphertext fragment (MTCF) technology is proposed and demonstrated in this paper. By performing algorithm encryption on the transmitted data before randomly assigning them to multiple channels corresponding to different wavelengths or Internet protocols (IPs), the secure and long-distance transmission can be realized. A field trial experiment over 125 km between Beijing and Xiongan has been successfully undertaken, and the results show that the maximum throughput can reach 60 Mb/s, which demonstrates the feasibility of the scheme. We also established a theoretical model to analyze the security performance of the proposed system. As far as we know, this is the first time that MTCF, an optical physical layer and application layer integrated security technology, has been enjoyed the capacity to access the public network, which provides an exciting opportunity to advance our knowledge of long-distance secure communication.