User Identity Alias Attribute Solution Space Can we use the existing attributes to solve the problem? Class The content of class attribute is intended to be opaque; known and interpreted by the home network UserName(1) Rewrite UserName(1) value could be rewritten by the intermediaries Subsequent accounting request may fail to route through the intermediary exchanges due to the lack of decoration knowledge by the home network Proposed User Identity Alias Attribute Avoids overloading the original purpose of UserName (1) Eliminates the routing issues due to NAI decoration |