AAA and Network Security for Mobile Access: Radius, by Madjid Nakhjiri

By Madjid Nakhjiri

Even though a radical remedy of the entire suitable elements of the marketed components of community defense, the English is undesirable sufficient to be ambiguous and distracting and plenty of locations. A instructed paintings if the reader is ready to wait and see and diligent with the awkward use of the English language.

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Extra info for AAA and Network Security for Mobile Access: Radius, Diameter, EAP, PKI and IP Mobility

Sample text

This way, when EAP is chosen as authentication protocol, the actual authentication is performed at a later stage. 5. Since the days of PPP and original creation of EAP as a PPP extension, EAP has found applications in many different environments and scenarios, especially in access environments, where IP is not implemented over the access link. EAP is now considered as an authentication framework that can support multiple and even future authentication mechanisms. We will go through EAP in more detail later on in this chapter and will devote an entire chapter (10) to discussing a variety of applications of EAP in authentication and key management.

1: ● ● ● ● In the first step, which is an optional step, the initiator (entity A) of the exchange sends an authentication request to the responder, with which the initiator wishes to engage in mutual authentication. The format of the request is not defined by NIST in order to allow a choice for a protocol that fits the exact deployment scenario. The responder (entity B) generates a random number (RB) as a challenge and sends it to entity A. This challenge is called TokenIR1 and must be used by entity A in a manner that fits the challenge/response protocol, being used.

The service equipment forwards the request to domain’s AAA server. Note that, in case, the user belongs to a different administrative domain, this AAA server is a local AAA server that must contact the user’s home AAA server. The home AAA server evaluates the request and returns a response that eventually gets back to the service equipment. The service equipment accepts or rejects the service based on the AAA server response and notifies the user accordingly. Push sequence: This model is the one most similar to the movie theatre ticket.

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