User authentication is essential in service-oriented communication networks to identify and
reject any unauthorized network access. The state-of-the-art practice in securing wireless
networks is based on the technique of authentication, authorization and accounting (AAA)
framework where an AAA server is adopted to authenticate mobile users (MUs), handle
authorization requests, and collect accounting data. However, the traditional AAA framework
is by way of a single authentication server, and cannot tolerate AAA server failure due to …

… The portal can access those files and use them to remember the user's data, such as
their chosen settings (screen view, interface language, etc.), or their login data. By using the
Infona portal the user accepts automatic saving and using this information for portal
operation purposes. More information on the subject can be found in the Privacy Policy and
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