The objectives of this research includes end-to-end confidentiality, authentication, message integrity and non-repudiation of SMS. SMS spoofing applications are widely available through which any sender ID can be set. Short Message Service (SMS) is used widely all over the world which may contain sensitive and confidential information like financial transactions. An adversary is able to capture the traffic over the wireless link and decrypt it using specialized hardware. Thus end-to-end security for SMS communication is not achieved in current GSM networks. Moreover, the encryption algorithms used over the wireless links provide weak notion of security. In today's GSM networks, security mechanisms provided by network operators are limited to the wireless links only, leaving the information traveling over the wired links insecure to a large extent. This paper puts together the software packages required to trigger the sniffing approach of the GSM-900, and to capture the BCCH & CCCH frames. The wireless sniffing will be largely used especially on universities to analyze the protocols and to evaluate the overall performances of wireless networks. In mobile communications, the providers are still using a combination of the old 2G (GSM) technologies together with the new 3G (UMTS) and 4G (LTE & WiMAX). Starting with the SpectrumWave project at Massachusetts Institute of Technology (MIT), the GNU Radio, is now among the most useful tool, for wireless packet sniffing together with software defined radio (SDR). This implementation leads to an open collection of tools written in C and Python that are allowing the most complex signal processing design under GNU Radio umbrella. This innovative concept has evolved toward visual programming in which case the signal processing is following a flow-graph to create very versatile and outstanding design. In a software defined radio architecture, many components and modules that have been typically implemented in hardware are allowed to be replaced with software components.
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