Re: [sipcore] SIP authentication using EC-SRP5 protocol
Paul Kyzivat <pkyzivat@alum.mit.edu> Tue, 10 March 2015 15:10 UTC
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Date: Tue, 10 Mar 2015 11:10:19 -0400
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Subject: Re: [sipcore] SIP authentication using EC-SRP5 protocol
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Dr. Liu, I just now quickly reviewed your draft. Let me first say that I am *not* expert in security and encryption. Since that is the primary focus of this draft I will be looking for comments from experts on that. I did not see any mention of how you propose to integrate this approach into SIP. Is it your intent to reuse the Authorization and Authentication-Info header fields? Or do you intend to introduce some other mechanism to exchange the information you use? Thanks, Paul On 3/10/15 2:28 AM, lfw_frank wrote: > hi, all > > We have just uploaded a draft regarding SIP authentication, which can be > seen at the link > > http://www.ietf.org/staging/draft-liu-sipcore-ec-srp-00.txt > > It is known that SIP authentication suffers from off-line dictionary > attacks due to the use of weak authentication scheme (HTTP digest > authentication). Our proposal is to apply the strong password > authentication scheme EC-SRP5 to SIP authentication. SIP Client and > server perform mutual authenticate by using the modern 'zero knowledge' > method without disclosing the password in the process. It is resilient > to various kinds of attacks, including off-line dictionary attacks. > Moreover, it has low computation complexity and low bandwidth > consumption due to the use of elliptical curve cryptography. > > This is the first version of our proposal. It is unavoidable that there > are errors in the document. Any comments and suggestions are highly > desired. > > Best regards > > Dr. Fuwen Liu > > Chinamobile > > > > > > > > _______________________________________________ > sipcore mailing list > sipcore@ietf.org > https://www.ietf.org/mailman/listinfo/sipcore >