Hybrid Encryption Based on DNA Encoding and Chaotic Systems for Enhanced Security in CO-GFDM Communication Systems

This paper proposes a hybrid encryption method that combines DNA encoding with chaotic encryption techniques to strengthen the security of a coherent optical generalized frequency division multiplexing CO-GFDM system. Simulation results show that the proposed approach improves physical-layer security with only a minimal performance penalty. The legitimate user can successfully decrypt the received signal, while an eavesdropper is unable to obtain any meaningful information.