Error Performance of Cryptography Transmission in Wireless Fading Channels

If an error occurs in encrypted data while transmitted over the wireless channel, it is known that the decryption process at the destination results in avalanche to the original data. Closed-form expressions for error performance of encrypted data over the wireless channel have not been given attention in literature. We consider crypto-systems signals transmitted over faded wireless channels and derive closed-form expressions for the bit error rate (BER). Numerical results and computer simulations are provided to interpret and verify the derived expressions. The results provide design engineers a quantitative insight into performance deterioration resulted from using cryptography in wireless communications using closed-form expressions rather than running time-consuming simulation programs.