Physical-layer encryption communication systems with block ciphers
Yong Ren · Journal of Tsinghua University(Science and Technology) · 2011
Traditional secure communication systems separate the channel coding and cryptography so security is not affected by channel errors.This paper presents a design method based on physical-layer encryption to further improve system security by introducing channel errors into the cryptography.This paper also presents a method to quantitatively evaluate this system secrecy by calculating the impact of channel errors and correlations in codewords as a new technical evaluation method for similar systems.Theoretical and simulation results show that when the bit error rate for the binary systemetric channel(BSC) is larger than a threshold,the system in this paper is more secure than traditional systems.