Security Authentication Scheme for Low Earth Orbit Satellites Based on Spatial Channel Characteristics

Security authentication can effectively solve the problem of access to Low Earth Orbit (LEO) satellites. However, the existing solutions still harbor some problems in the computational complexity of satellite authentication, flexible networking, resistance to brute force attacks and other aspects. So, a security authentication scheme for LEO satellites that integrates spatial channel characteristics is designed within the software defined network architecture. In this scheme, the spatial channel characteristics are introduced to the subsequent lightweight encryption algorithm to achieve effective defense against brute force attacks. According to security analysis and simulation results, the scheme can effectively reduce the computational overhead while protecting against replay attacks, brute force attacks, DOS attacks, and other known attacks.