Joint Channel Coding and Cryptography for SMS

SMS has a variety of advantages and disadvantages for M-Commerce purpose. The advantages are easy to use, common messaging tool among consumers, works across all wireless operators, affordable for mobile users, no specific software required for installation, allows banks and financial institutions to provide real-time information to consumers & employees, stored messages can be accessed without a network connection. Most important disadvantage of SMS so it does not offer a secure environment for confidential data during transmission and there is no standard procedure to certify the SMS sender. There is a need for an end to end SMS Encryption with errorless message transmission in order to provide a secure with error free data transmission for communication. These two factors are important for SMS. Till now there is no such scheme that provides complete solutions. The transmission of an SMS in GSM network is not secure at all. Therefore it is desirable to fully secure with errorless SMS for business purposes. Both these two issues are researched and dealt separately with sufficient literature available. However these solutions were dealt separately till now. In this paper, we have analyzed about Joint Channel Coding and Cryptography (JCCC), Soft Input Decryption (SID). We theoretically proposed a novel scheme XTR - NR Signature algorithm in this paper. We are expecting that it will improve the current security level, fastest speed and provide reliable message recovery at receiver end with respect to key generation, encryption decryption, signing and verification and small key size for SMS application in any kind of mobile device.