Modified - DES and Triple Modified - DES Encryption Algorithm with Reduced BER in Wireless Communication

In this paper, we propose a modification to the existing Data Encryption Standard (DES) to make it secure and prone to the bit errors caused by the wireless channel. We observe that using the modified algorithm in wireless channels, improves the bit error rate (BER) performance as well as security compared to DES. Wireless channels are an open medium to intruders and their attacks; encryption is a vital process to assure security over these channels. However, using well-known encryption algorithms to encrypt data in wireless communication will result in a catastrophic error due to the avalanche effect, which is implemented in these algorithms to assure security. Although this effect is desirable to assure security, these algorithms do not take into account the bit error characteristics of the wireless channel. So the need for a new secure encryption algorithm that takes into account the bit error characteristics of wireless channels becomes necessary.