User random access authentication protocol for low earth orbit satellite networks
ZHU Hui1,2, CHEN Siyu1,2, LI Fenghua1, WU Heng1,2, ZHAO Haiqiang2, WANG Gang1
1. School of Cyber Engineering, Xidian University, Xi'an 710071, China; 2. Science and Technology on Communication Networks Laboratory, China Electronics Technology Group Corporation, Shijiazhuang 050081, China
Abstract：Low earth orbit (LEO) satellite networks can be used as supplementary networks for ground-based networks to provide network services for complex areas. However, the satellite networks characteristics such as open channels, a dynamic network topology, and a large number of user terminals can lead to problems of security, quality of service (QoS), and network control center overloading. This paper presents a dynamic access authentication protocol based on Token and the satellite orbit predictability and accurate clock synchronization to construct pre-authentication vectors which implement user random access and seamless switching. Simulations show that this protocol satisfies the security requirements with low handover delay and low computational costs for efficient and secure access authentication for users in LEO satellite networks.
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