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Re: [] Kerberos based authentication for SIP

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  • From: Candace Holman <>
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  • Subject: Re: [] Kerberos based authentication for SIP
  • Date: Thu, 30 Mar 2006 14:37:13 -0500


I'm not sure why Kerberos fell by the wayside, but there exists already an expired IETF draft from 2003: You may be able to contact the author for more info.

Interestingly, Google turns up a European Microsoft patent from 2002 for a Kerberized system:


Timothy P Shortall wrote:

Hello Prashant,

We are currently in the middle of a VOIP RFP. I personally support the routing and switching for UMD, but understand that we are currently looking seriously at Kerberos as well so your suggestion is very good.


/ /

/Timothy P. Shortall/

/Sr. Network Engineer/

/University/ of Maryland

/Networking & Telecommunications Services/



*From:* Prashant Kumar
*Sent:* Thursday, March 30, 2006 11:54 AM

*Subject:* [] Kerberos based authentication for SIP

Hello All,

Recently I spoke to some of our customers and they said that SIP RFC 3261 not supporting Kerberos based authentication is a huge problem in the University environment since there is no mechanism in HTTP digest to get the the un-hashed password (token) back.

Is there a huge interest for Kerberos Authentication in SIP environment? If yes, I could work on a draft which proposes Kerboros based authentication scheme in SIP.




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