Toward Efficient Mobile Authentication in Wireless Inter-domain

Many hierarchical mobility schemes have been proposed for the Internet. They all seek to improve the hand-off especially when the mobile terminal is moving relatively far from its point of attachment. Some simulations have been presented for their models, but none has addressed security problems. Moreover, these solutions address only the improvement of mobility without studying the impact of authentication, yet authentication is part of security and it is mandatory in such schemes. This work introduces a mobile authentication mechanism for wireless inter-domain mobility allowing for the reduction of authentication exchange delay. The mechanism constitutes the AAA broker which plays a role of an auxiliary AAA server in the authentication procedures. We first design a binarybased authentication model for our AAA architecture and present a total authentication exchange cost minimizing function to lessen the authentication exchange delay. The paper also reports results showing that the performed evaluations prove the efficiency of our mobile authentication method for wireless inter-domain.