SMS Encryption for Mobile Communication

Abstract

This paper deals with an SMS encryption for mobile communication. The transmission of an SMS in GSM network is not secure, therefore it is desirable to secure SMS by additional encryption. In the following text, there are compared differences in the use of symmetric and asymmetric cryptography for SMS transfer securing. In the next part, there is the description of design and implementation of the application for mobile phones, which encrypts and signs SMS using an asymmetric RSA cipher. At the end, there are described attacks on secured SMS and future extension of the application.