[EAPEXT] How does eap-sim authentication start from authenticator sending "Identity request" message?

mandar naik <mandarn25@yahoo.co.in> Tue, 24 January 2012 13:37 UTC

Return-Path: <mandarn25@yahoo.co.in>
X-Original-To: eapext@ietfa.amsl.com
Delivered-To: eapext@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9EC7921F84DD for <eapext@ietfa.amsl.com>; Tue, 24 Jan 2012 05:37:31 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: 3.601
X-Spam-Level: ***
X-Spam-Status: No, score=3.601 tagged_above=-999 required=5 tests=[BAYES_95=3, HTML_MESSAGE=0.001, J_CHICKENPOX_74=0.6]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 85mSNON7tIZ6 for <eapext@ietfa.amsl.com>; Tue, 24 Jan 2012 05:37:30 -0800 (PST)
Received: from nm4-vm0.bullet.mail.in.yahoo.com (nm4-vm0.bullet.mail.in.yahoo.com [121.101.151.213]) by ietfa.amsl.com (Postfix) with SMTP id 56CD221F84DE for <eapext@ietf.org>; Tue, 24 Jan 2012 05:37:30 -0800 (PST)
Received: from [121.101.151.238] by nm4.bullet.mail.in.yahoo.com with NNFMP; 24 Jan 2012 13:37:25 -0000
Received: from [121.101.151.233] by tm3.bullet.mail.in.yahoo.com with NNFMP; 24 Jan 2012 13:39:15 -0000
Received: from [127.0.0.1] by omp1002.mail.in.yahoo.com with NNFMP; 24 Jan 2012 13:44:38 -0000
X-Yahoo-Newman-Property: ymail-3
X-Yahoo-Newman-Id: 647497.41366.bm@omp1002.mail.in.yahoo.com
Received: (qmail 99375 invoked by uid 60001); 24 Jan 2012 13:37:25 -0000
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.in; s=s1024; t=1327412245; bh=d7CFAYoBvF8lJ7lwlEZd1BwPRuJk04K8kRArc7pl3Ns=; h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type; b=4fcRgDCdNDL/z5deOZg8uc5KLoYjlkqeEOzd4U9ivVqeF788xQL6CUXVYZePrFUbBn+K9+OD0gRQeGjtb8Ah3NPyW/+dBFQHumcFE92gNhK/QZtJsYYtNAKs6MZ6hvqSQ7KMcT0KLjM+R9DYkrpmKhksQLvzpeowiUv6kp3A8u8=
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.in; h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type; b=kHIYbvN5EmJbFTB2j293JUTwXjyXYBjIJAxJC1IqU/Tbv0fEg2MiEyjF8tjhagVM8FBOLtaZSCiyoA9biA6kYxhDiCh4VSxQjVRwEz0EDVX/nJ31K25favzs0A957d8Ip6FR0fkDhNoYDNO6CQlZVIWdovbgHCl0xaFi/Z0NsXs=;
X-YMail-OSG: 6nD44B0VM1lTJCnFXRPJdl9gavBFudTgFQJe7BvN.GfVGF6 L_9N.gKIhnU405QBDDt45ppYJxMDy4L6yZcPXNmEj.Hh46LbOcU8oANxZClg ePOY7FqTEq1KOo9xqIrrEK_2vgvzpUvo8UGJiSWIHT3pHDid9uTSUyYoYry6 0IInO2G1Wh7uIp_8PuhaeivGwo1GKYMlS4DUnMZbnSpLKAx.Iw6l6MjHiYVC 8GB2gmbb0nN4lS2sooGJVlNUAzORAaS9Mk0ygzPTMVMm5Nl1RCMROMvNHvmq 3EUy1AJP5wCast6upkZR1.qGbtUMMkIs71Ye_dvh9jBdmyD_vBezqDpf6MpE NrQMzNOzG0uFzzODbwMPTRf00mH4MSrKEgAvn.KPaxzCaRi7o131_b2xF_Mr dz7LcRFKYeeO5g9Vt3ktbKNyGDyK5hErQNiJIoARuayjrl0A02E04
Received: from [72.163.217.103] by web95904.mail.in.yahoo.com via HTTP; Tue, 24 Jan 2012 19:07:25 IST
X-Mailer: YahooMailWebService/0.8.116.331537
Message-ID: <1327412245.98041.YahooMailNeo@web95904.mail.in.yahoo.com>
Date: Tue, 24 Jan 2012 19:07:25 +0530 (IST)
From: mandar naik <mandarn25@yahoo.co.in>
To: "eapext@ietf.org" <eapext@ietf.org>
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="588357045-139770252-1327412245=:98041"
Subject: [EAPEXT] How does eap-sim authentication start from authenticator sending "Identity request" message?
X-BeenThere: eapext@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
Reply-To: mandar naik <mandarn25@yahoo.co.in>
List-Id: EAP Extensions <eapext.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/eapext>, <mailto:eapext-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/eapext>
List-Post: <mailto:eapext@ietf.org>
List-Help: <mailto:eapext-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/eapext>, <mailto:eapext-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 24 Jan 2012 13:39:56 -0000

Hi,
 I was trying to learn EAP-SIM authentication and I have gone through RFC 4186 which talks about the same.
As per RFC, authentication process starts with" Identity request"from authenticatorbut I had a question that 

how authenticator gets an indication to initiate EAP-SIM process by sending "Identity request"? 

Could anyone explain more about this scenario ?
Thanking in anticipation,


Best Regards, 

Mandar Naik