Date Added: Aug 2011
Wireless communication is known as key to global development and has become main stream of users daily business. Protecting information and communication speed is an issue which the authors need to focus on the wireless networks. Universal Mobile Telecommunication System (UMTS) is evolution of third generation mobile communication system. It was built on the success of global system for mobile communication (GSM), UMTS security is also built upon GSM, so there is lot of security challenges such as the user identity, confidentiality. The international mobile subscriber identity travels through radio interface in free text format without any encryption.