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Re: [HOKEY] EMSKname in keyName-NAI

Lakshminath Dondeti <ldondeti@qualcomm.com> Wed, 20 February 2008 20:23 UTC

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Date: Wed, 20 Feb 2008 12:21:43 -0800
From: Lakshminath Dondeti <ldondeti@qualcomm.com>
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To: Yoshihiro Ohba <yohba@tari.toshiba.com>
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Cc: hokey@ietf.org
Subject: Re: [HOKEY] EMSKname in keyName-NAI
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On 2/20/2008 12:12 PM, Yoshihiro Ohba wrote:
> I have two questions on EMSKname in keyName-NAI in draft-ietf-hokey-erx-11.txt:
> 
> "
>   keyName-NAI - ERP messages are integrity protected with the rIK or
>   the DS-rIK.  The use of rIK or DS-rIK for integrity protection of
>   ERP messages is indicated by the EMSKname [3], the protocol, which
>   is ERP, and the realm, which indicates the domainname of the ER
>   server.  The EMSKname is copied into the username part of the NAI.
> "
> 
> - What is the exact format of EMSKname ?  I could not fined an EMSK
> name definition in [3].  

It's in a revision that Joe is going to submit shortly.

> 
> - Does the format of EMSKname (if specified somewhere) follow the NAI
> format defined in RFC 4282.

EMSKname is a 64-bit key identifier.
EMSKname = SHA-256-64(EAP Session ID, "EMSK")

thanks,
Lakshminath

> 
> Best Regards,
> Yoshihiro Ohba
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> 
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