Data Security in Mobile Communication

Global System for Mobile Communications (GSM) is the most widely used cellular technology in the world. Main objective in mobile communication systems is security of data exchanged. GSM uses several cryptographic algorithms for security like A5/1, A5/2 and A5/3. From extensive literature survey it has been found that these algorithms are cracked by various practical attacks so these algorithms do not provide sufficient levels of security for protecting the confidentiality of GSM therefore it is desirable to secure data by additional encryption. In this paper we have proposed additional encryption by implementing DES, TripleDES, and AES algorithms on GSM Network. For testing these algorithms on GSM,sending and receiving code is simulated by doing GSM encoding and decoding. This paper also analyzes the effectiveness of these algorithms against brute force attack implemented in MATLAB environment.