A Novel Scheme for Joint Error Control and Dynamic Security Coding Using Puncturing Mechanism

Abstract

Reliability and confidentiality are two crucial aspects of digital wireless communications. Due to open-air communication, wireless communication is easy to be eavesdropped on. This paper proposes a scheme allowing a joint error control and dynamic security coding. This scheme consists of combining encryption and Turbo coding in only one step. The secret key derived from channel parameters between legitimate users is used as a seed for Data Encryption Standard (DES) generator and Advanced Encryption Standard (AES) generators with different key lengths to generate a pseudo-random bit sequence. The pseudo-random bit sequence is used to control the puncturing mechanism in the Turbo code. The simulations are carried out in Additive White Gaussian Noise (AWGN) and Rayleigh channels. The simulation results show that the proposed scheme in the AES generator with a high key length outperforms the conventional Turbo code in error correction capability. Moreover, the proposed scheme allows dynamic security coding without changing the hardware structure of the transceiver devices.