Re: [TLS] draft-green-tls-static-dh-in-tls13-01

"Salz, Rich" <rsalz@akamai.com> Sun, 16 July 2017 09:15 UTC

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From: "Salz, Rich" <rsalz@akamai.com>
To: =?utf-8?B?Q29sbSBNYWNDw6FydGhhaWdo?= <colm@allcosts.net>
CC: Stephen Farrell <stephen.farrell@cs.tcd.ie>, "tls@ietf.org" <tls@ietf.org>, Matthew Green <matthewdgreen@gmail.com>
Thread-Topic: [TLS] draft-green-tls-static-dh-in-tls13-01
Thread-Index: AQHS9u8P86lPDndxlUiqCEzu895UtqJKs/sAgAkO1gCAAK3pYIAARzIAgAC+W4D//9gbEIAAga+AgAAdCICAAEOKgIAAN5MA///LkJCAAEZ9AP//vjvA
Date: Sun, 16 Jul 2017 09:14:53 +0000
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Subject: Re: [TLS] draft-green-tls-static-dh-in-tls13-01
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Within an enterprise that believes they need this kind of packet-capture-decode thing, what are the other benefits of TLS 1.3?  They can already use good ciphers. They save the cost of not uplifting existing infrastructure. They lose 0RTT early-data, which when viewed globally seems like a reasonable trade-off.

I am much more cynical about the value of opt-in.  I mean, what are you expecting users to agree to?  And globally, what infinitesimal portion of the Web population can make an informed choice?  And often there is no choice – one of the advocates here is from a statewide insurance company.

So what is compelling about TLS 1.3 after you take away forward secrecy?  I really want to hear an answer to that question from folks who say they need TLS 1.3 but without it.