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User Identity Alias Attribute Problem Space The true identity of the subscriber can be hidden from the NAS and RADIUS AAA proxies outside the subscriber’s home network (i.e., outer NAI identity = anonymous@ anyisp.com), which leads to the following concerns: AAA proxies need to correlate an authentication session to a user identity known only by the user’s home network. Examples: For fraud detection and protection For revenue assurance NAS may require to match the user session and accounting records to a user identity known to the user’s home network. Examples: For Charging dispute A unique identity known by the home network needs to be conveyed to all parties involved in the roaming transaction |