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Re: [TLS] draft-jay-tls-psk-identity-extension-01

David Woodhouse <dwmw2@infradead.org> Wed, 21 September 2016 20:43 UTC

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From: David Woodhouse <dwmw2@infradead.org>
To: Eric Rescorla <ekr@rtfm.com>
Date: Wed, 21 Sep 2016 21:43:10 +0100
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Cc: "jayaraghavendran@gmail.com" <jayaraghavendran@gmail.com>, "tls@ietf.org" <tls@ietf.org>, Nikos Mavrogiannopoulos <n.mavrogiannopoulos@gmail.com>
Subject: Re: [TLS] draft-jay-tls-psk-identity-extension-01
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On Wed, 2016-09-21 at 13:36 -0700, Eric Rescorla wrote:
> > 
> I don't see how this is appreciably easier than just having the
> client offer one and then the server HRR.

If I have ten PSK identities I can offer, it may take nine round-trips
before I send the one you want.

If I list them all in my first ClientHello and you *tell* me which one
you want, that's only one more round-trip.

-- 
dwmw2

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