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Re: [TLS] Initial draft of DH-based key exchange

Russ Housley <housley@vigilsec.com> Fri, 27 March 2015 21:45 UTC

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From: Russ Housley <housley@vigilsec.com>
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Date: Fri, 27 Mar 2015 17:44:30 -0400
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To: Eric Rescorla <ekr@rtfm.com>
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Subject: Re: [TLS] Initial draft of DH-based key exchange
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Eric:

> At the interim discussed transitioning to a DH-based handshake (rather
> than a signature-based one) like that proposed by Hugo Krawczyk and
> Hoeteck Wee. The major rationale for this change is that any 0-RTT
> mode is inherently DH-based and so if we make that our basic mode,
> then we can simplify the protocol logic and key derivation model. This
> model also allows us to pull in PSK modes under the same basic
> structure.

I was not at the interim, but I was at the TLS session at IETF 92 in Dallas.

I was watching your presentation pretty carefully, and I do not recall a slide on support for PSK.  Can you point me to a description of "PSK modes under the same basic structure"?

Russ

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