Ensuring secure communication using chaotic signals
The developed communication security system uses a chaotic cryptographic technique for orthogonal frequency division multiplexing (OFDM) implemented with an OFDM symbol structure based on symmetric key cryptography. The system security is proportional to (L×N)! where N is the number of subcarriers in the OFDM system and L is the number of OFDM symbols involved in the encryption process. The system encrypts/decrypts data at a physical layer of an OFDM data transmission system.