eap Mailing List: EAP SIM and AKA identities.

[Suresh (sureshvv]

> Hi
> I have a small clarification in the identities and user names used in the
> EAP-SIM and AKA implementations.
> When ever a client needs to send fill in the AT_IDENTITY attribute, it
> has to fill in the complete identity, and the identity may or may not
> have a realm portion.
> The format of the permanent user name is 0|IMSI and 1|IMSI for the AKA
> and SIM respectively. 
> It is also given that 
>
>    The EAP server MAY use the
> leading "1" as a hint to try EAP-SIM as
>    the first authentication method during method negotiation,
> rather
>    than for example EAP/AKA.  The EAP-SIM server MAY
> propose EAP-SIM
>    even if the leading character was not
> "1".
>
> for EAP-AKA. 
>
> I could not understand how user name is sent to the EAP-Server, in
> actual, complete identity is sent in the AT_IDENTITY attribute and not
> just the user name.
>
> regards,
> Suresh
>