Security Enhanced Communication Scheme with Error Correction Capability and Efficient Channel Utilization

Abstract—Security,channel utilization and error correction are of great importance especially in the case of any bandlimited channels which demands high security.This paper describes a new communication scheme which provide enhanced security without compromising on channel utilization and has capability of correcting bit errors.Traditionaly messages were compressed then subjected to encryption before transmission but here the message is encrypted and then compressed,the encryption scheme being employed is DES algorithm.By compressing the encrypted data using RLE,more data can be send through the channel whereby can achieve efficient channel utilization without compromising on the security of the encryption scheme. For combating bit errors,an EDAC system is developed which make use of Hamming codes which can detect and correct one bit errors effectively.When a corrupted message is received,then it is corrected by the error correction scheme.So, the error correction plays an important role in the overall efficiency of the proposed scheme. The overall system can achieve improved detection accuracy, better channel utilization and provide highly secure and reliable communication.The entire system is functionally simulated and verified using Xilinx 9.1 and Modelsim 6.1. Keywords — EDAC system,DES algorithm,RLE,Hamming codes I