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Re: [TLS] TLS 1.3 - Support for compression to be removed

Daniel Kahn Gillmor <dkg@fifthhorseman.net> Fri, 02 October 2015 15:47 UTC

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From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
To: "Salz, Rich" <rsalz@akamai.com>, takamichi saito <saito@cs.meiji.ac.jp>, "tls@ietf.org" <tls@ietf.org>
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Subject: Re: [TLS] TLS 1.3 - Support for compression to be removed
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On Fri 2015-10-02 11:24:10 -0400, Salz, Rich wrote:
>> Which one is safer, "tls1.2" v.s. "tls1.3 with comp/decomp" ?
>
> They are equivalent.  If you use AES-GCM and ECDHE, and you don't need 0RTT, then there is no compelling reason to use TLS 1.3.

...and you use session-hash, and you either don't do renegotiation or
require secure renegotiation, and you don't use TLS-Unique, and you're
ok with fully-cleartext handshakes, and (maybe something(s) else i'm
forgetting) ...

I don't think we should be claiming that TLS 1.2 is equivalent to TLS
1.3 without many more caveats.   :)

          --dkg

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