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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: iSCSI: Login authentication SRP/CHAPBill, > So based on your statement below have you warrented that IBM will make NO IP > claims on the usage of SRP in iSCSI ??? I'm not aware of any IBM claims on SRP, but I cannot make any such official statement for IBM. Do yo have any specific IBM patent in mind or you asked the above just because you answered ME, and I happen to work for IBM ? Regards, Ofer Ofer Biran Storage and Systems Technology IBM Research Lab in Haifa biran@il.ibm.com 972-4-8296253 "Bill Strahm" <bill@Sanera.net> on 23/10/2001 17:32:51 Please respond to "Bill Strahm" <bill@Sanera.net> To: Ofer Biran/Haifa/IBM@IBMIL cc: Joe Czap/Raleigh/IBM@IBMUS, "IPS Reflector \(E-mail\)" <ips@ece.cmu.edu>, John Hufferd/San Jose/IBM@IBMUS Subject: RE: iSCSI: Login authentication SRP/CHAP Brian, Arguing for situations where IPsec is not implemented/used is a Red Herring. If it is not implemented it is not an iSCSI implementation (remember MUST implement IPsec) therefor it does not have to be considered. If it is not used, then that is an administrative descision that is made based on the security requirements of the environment. My arguement is that CHAP is understood, code is available, it plugs into other authentication services (RADIUS/SecureID) that I am not sure how I would plug an SRP implementation into anyway, and I think that I HAVE to implement it... now SRP doesn't seem to be buying me anything except for "improved security" on a administratively secured link, doesn't seem like much. So based on your statement below have you warrented that IBM will make NO IP claims on the usage of SRP in iSCSI ??? Bill -----Original Message----- From: owner-ips@ece.cmu.edu [mailto:owner-ips@ece.cmu.edu]On Behalf Of Ofer Biran Sent: Tuesday, October 23, 2001 1:09 AM To: Bill Strahm Cc: Joe Czap; IPS Reflector (E-mail); John Hufferd Subject: RE: iSCSI: Login authentication SRP/CHAP 1. It's good news that the Stanford license fee is zero (I verified this - see attached note). 2. > Can you warrant that I will not have to use SRP-Z to implement any iSCSI > operations ? The SRP usage defined in iSCSI is EXACTLY according to RFC-2945. This usage is explicitly covered by the Stanford free license. SRP-Z involves additional private/public keys for the server, and you will not have to use that if you only want to follow the iSCSI standard. 3. If anyone has information about any other IP claiming on the RFC-2945 usage (SRP-SHA1) please post the full information here. 4. There is no question about the superior cryptographic features of SRP over CHAP. In situations where underlying IPsec will not be implemented/used (and these are forecasted), basing the iSCSI security on plain CHAP is a poor solution which IMHO the iSCSI standard should not encourage (by mandating CHAP instead of SRP). Regards, Ofer Ofer Biran Storage and Systems Technology IBM Research Lab in Haifa biran@il.ibm.com 972-4-8296253 Kirsten Leute <kirsten.leute@stanford.edu> on 23/10/2001 00:18:00 Please respond to Kirsten Leute <kirsten.leute@stanford.edu> To: Ofer Biran/Haifa/IBM@IBMIL cc: Subject: Re: SRP Licensing terms Dear Ofer: Yes, this is correct. For the type of usage described in the agreement, there are no licensing fees. As far as I know, there are no licensing issues from Stanford. Best, Kirsten At 06:58 PM 10/22/2001 +0300, you wrote: Kirsten, I'm working on the security aspects of the new iSCSI standard in the IPS working group of the IETF. Our intention is to define SRP (usage according to RFC2945) as the 'mandatory to implement' authentication algorithm. There were concerns in the working group about the licensing terms with Stanford. I looked in your "Ready-to-Sign Agreements" page and it seems to me that there are no fee involved in getting this license. I wanted to verify this with you. Also - are you aware of any other licensing issue with SRP Thanks in advance, Ofer Ofer Biran Storage and Systems Technology IBM Research Lab in Haifa biran@il.ibm.com 972-4-8296253 ************************************** Kirsten Leute Licensing Associate Office of Technology Licensing, Stanford University 900 Welch Road, Suite 350, Palo Alto, CA 94304 Direct: (650) 725-9407; Fax: (650) 725-7295 website: http://otl.stanford.edu/ "Bill Strahm" <bill@sanera.net>@ece.cmu.edu on 22/10/2001 18:58:06 Please respond to "Bill Strahm" <bill@sanera.net> Sent by: owner-ips@ece.cmu.edu To: Joe Czap/Raleigh/IBM@IBMUS cc: "IPS Reflector \(E-mail\)" <ips@ece.cmu.edu>, John Hufferd/San Jose/IBM@IBMUS, <owner-ips@ece.cmu.edu> Subject: RE: iSCSI: Login authentication SRP/CHAP Directly from the Stanford license (http://otl.stanford.edu/pdf/97006.pdf) "Licensed Field of Use" means use of the Invention(s), Software and Licensed Patent(s) in Licensed Product(s) for implicit server authentication. By way of example, but not by limitation, RFC2945. The Licensed Field of Use specifically excludes use of the Invention(s), Software and Licensed Patent(s) machines and servers that deal with explicit bidirectional authentication (for example, SRP-Z for explicit server authentification). SOFTWARE may only be transferred under a Use Sublicense. Note that this applies only if Stanford is the only organization to own IP on this technology and there are no other patents in this field. Joe, can you warrant that IBM will make NO patent claims against this algorithm ? Can you warrant that I will not have to use SRP-Z to implement any iSCSI operations ? Again the problem isn't with the algorithm necissarily, but with the fact that it is the only MUST implement algorithm, I would rather see an algorithm with NO encumbrance against it... Bill +========+=========+=========+=========+=========+=========+=========+ Bill Strahm Software Development is a race between Programmers Member of the trying to build bigger and better idiot proof software Technical Staff and the Universe trying to produce bigger and better bill@sanera.net idiots. (503) 601-0263 So far the Universe is winning --- Rich Cook -----Original Message----- From: owner-ips@ece.cmu.edu [mailto:owner-ips@ece.cmu.edu]On Behalf Of Joe Czap Sent: Monday, October 22, 2001 5:03 AM To: Bill Strahm Cc: IPS Reflector (E-mail); John Hufferd; owner-ips@ece.cmu.edu Subject: RE: iSCSI: Login authentication SRP/CHAP The lack of information relating to SRP IP concerns make the issue seem a little like misdirection. Can anyone offer a clear explanation the SRP IP situation ? Joe Czap IBM Storage Networking zapper@us.ibm.com
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