Re: [TLS] Some comments about draft-badra-ecdhe-tls-psk-01

["Dan Harkins" <dharkins@xxxxxxxxxx>]

  Hi Pasi,

On Tue, January 29, 2008 4:51 am, Pasi.Eronen@xxxxxxxxx wrote:
> <not wearing any hats>
>
> Overall comment: While the technical solution is reasonably defined
> and scoped, do we have any evidence that someone cares about it?
> I.e., do we have information suggesting that if this was specified,
> it would actually be used in real world? If we don't, let's not
> spend WG time on it...

  Personally I would view a password-based authentication scheme that
assumes the shared key is a low-entropy one or is selected from a limited
set of keys, like a dictionary, as more useful to the real world. I
believe that is the predominant access method used in the Internet today.

  IEEE P1363.2 has a draft out describing password-based authentication
protocols using elliptic curves.

  While a password-based authentication scheme would be _more_ useful
I still think there's value in pursuing a PSK-based scheme using elliptic
curves. It's an efficient alternative to the existing PSK cipher suites
that use groups based on exponentiation modulus a large prime.

  Dan.





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