Abstract
Rapid developments in wireless technologies in terms of speed, quality and coverage are great motivations that lead to an increase in the use of mobile devices such as laptops and smart phones. These developments facilitate exchanging information anywhere any time. However, some concerns have been raised especially when the mobile users want to access services that provided by foreign networks. These issues can be classified as security and performance matters. This paper proposes a fast and secure authentication protocol. The new feature about this protocol is that the foreign network (FN) can authenticate the mobile user (MU) without checking with the home network (HN). This feature can effectively enhance the network performance as just two messages are required to authenticate the MU. Moreover, we will demonstrate the strengths of this protocol against the common security attacks and we will compare the protocol performance with the previous protocols to ensure efficiency.