Re: [TLS] [Cfrg] 3DES diediedie
Derek Atkins <derek@ihtfp.com> Fri, 02 September 2016 17:00 UTC
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From: Derek Atkins <derek@ihtfp.com>
To: "Steven M. Bellovin" <smb@cs.columbia.edu>
References: <CAHOTMV+r5PVxqnSozYyqJqq_YocMKV06aAa-43t+5Huzh7Lo=A@mail.gmail.com> <F42128A0-9682-4042-8C7E-E3686743B314@cisco.com> <9A043F3CF02CD34C8E74AC1594475C73F4D0473F@uxcn10-5.UoA.auckland.ac.nz> <B749662D-B518-46E0-A51D-4AD1D30A8ED2@cisco.com> <9A043F3CF02CD34C8E74AC1594475C73F4D0528F@uxcn10-5.UoA.auckland.ac.nz> <3401C8F7-5A74-4D02-96F5-057E9A45F8B0@cisco.com> <89A46793-73A1-4C71-9954-37BF6ED6F297@callas.org> <5CF32AA8-59CC-4918-8951-A2ACBD233C19@cs.columbia.edu> <sjmfuplvx8q.fsf@securerf.ihtfp.org> <1468330B-F858-4E89-B791-B83507475C48@cs.columbia.edu>
Date: Fri, 02 Sep 2016 13:00:17 -0400
In-Reply-To: <1468330B-F858-4E89-B791-B83507475C48@cs.columbia.edu> (Steven M. Bellovin's message of "Wed, 31 Aug 2016 22:54:13 -0400")
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Cc: Jon Callas <jon@callas.org>, "cfrg@irtf.org" <cfrg@irtf.org>, David McGrew <mcgrew@cisco.com>, tls@ietf.org, Derek Atkins <derek@ihtfp.com>
Subject: Re: [TLS] [Cfrg] 3DES diediedie
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"Steven M. Bellovin" <smb@cs.columbia.edu> writes: > On 31 Aug 2016, at 10:17, Derek Atkins wrote: > >> "Steven M. Bellovin" <smb@cs.columbia.edu> writes: >> >>> Yes. To a large extent, the "IoT devices are too puny for real >>> crypto" is a hangover from several years ago. It was once true; for >>> the most part, it isn't today, but people haven't flushed their cache >>> from the old received wisdom. >> >> This is certainly true for AES, mostly because many small chips are >> including AES accelerators in hardware. It's not quite true for public >> key solutions; there are still very small devices where even ECC takes >> too long (and yes, there are cases where 200-400ms is still too long). >> > Certainly plausible. What I'm saying is (a) don't assert, measure; and > (b) measure again next year because tech keeps improving. > > As for your specific points: if AES is indeed feasible, we don't need > new ciphers. It is feasible in many cases. It may not be feasible in all cases. > If elliptic curve is too slow, the only answer is architectures > that don't use public key at all; we're not going to find new, cheaper > public key algorithms without a *lot* of effort and the people who can > do that sort of thing are too busy working on post-quantum crypto. Nothing says these two aren't the same problem ;) > The remaining approach is a cheaper protocol than TLS. That shouldn't > be hard at all, especially if we're going back to KDCs. True. > --Steve Bellovin, https://www.cs.columbia.edu/~smb -derek -- Derek Atkins 617-623-3745 derek@ihtfp.com www.ihtfp.com Computer and Internet Security Consultant
- [TLS] 3DES diediedie Tony Arcieri
- Re: [TLS] [Cfrg] 3DES diediedie Benjamin Kaduk
- Re: [TLS] [Cfrg] 3DES diediedie Tony Arcieri
- Re: [TLS] [Cfrg] 3DES diediedie Tony Arcieri
- Re: [TLS] [Cfrg] 3DES diediedie Stephen Farrell
- Re: [TLS] [Cfrg] 3DES diediedie Tony Arcieri
- Re: [TLS] [Cfrg] 3DES diediedie Viktor Dukhovni
- Re: [TLS] 3DES diediedie Peter Gutmann
- Re: [TLS] 3DES diediedie Tony Arcieri
- Re: [TLS] [Cfrg] 3DES diediedie John Mattsson
- Re: [TLS] [Cfrg] 3DES diediedie Stephen Farrell
- Re: [TLS] [Cfrg] 3DES diediedie Hubert Kario
- Re: [TLS] [Cfrg] 3DES diediedie david wong
- Re: [TLS] [Cfrg] 3DES diediedie Eric Rescorla
- Re: [TLS] [Cfrg] 3DES diediedie Ira McDonald
- Re: [TLS] [Cfrg] 3DES diediedie Hubert Kario
- Re: [TLS] 3DES diediedie Geoffrey Keating
- Re: [TLS] 3DES diediedie Dmitry Belyavsky
- Re: [TLS] [Cfrg] 3DES diediedie Stanislav V. Smyshlyaev
- Re: [TLS] 3DES diediedie Hanno Böck
- Re: [TLS] [Cfrg] 3DES diediedie David McGrew (mcgrew)
- Re: [TLS] [Cfrg] 3DES diediedie Watson Ladd
- Re: [TLS] 3DES diediedie Peter Gutmann
- Re: [TLS] [Cfrg] 3DES diediedie Peter Gutmann
- Re: [TLS] [Cfrg] 3DES diediedie David McGrew (mcgrew)
- Re: [TLS] [Cfrg] 3DES diediedie Karthikeyan Bhargavan
- Re: [TLS] [Cfrg] 3DES diediedie Peter Gutmann
- Re: [TLS] [Cfrg] 3DES diediedie Peter Gutmann
- Re: [TLS] [Cfrg] 3DES diediedie Stephen Farrell
- Re: [TLS] [Cfrg] 3DES diediedie Peter Gutmann
- Re: [TLS] [Cfrg] 3DES diediedie Hubert Kario
- Re: [TLS] [Cfrg] 3DES diediedie David McGrew (mcgrew)
- Re: [TLS] [Cfrg] 3DES diediedie Joachim Strömbergson
- Re: [TLS] [Cfrg] 3DES diediedie John Mattsson
- [TLS] (confusing the issues) Re: [Cfrg] 3DES died… Rene Struik
- Re: [TLS] [Cfrg] 3DES diediedie Ilari Liusvaara
- Re: [TLS] (confusing the issues) Re: [Cfrg] 3DES … Dave Garrett
- Re: [TLS] [Cfrg] 3DES diediedie Jon Callas
- Re: [TLS] [Cfrg] (confusing the issues) Re: 3DES … Jon Callas
- Re: [TLS] [Cfrg] 3DES diediedie Steven M. Bellovin
- Re: [TLS] [Cfrg] (confusing the issues) Re: 3DES … Rene Struik
- Re: [TLS] [Cfrg] (confusing the issues) Re: 3DES … Greg Rose
- Re: [TLS] [Cfrg] 3DES diediedie Peter Gutmann
- Re: [TLS] [Cfrg] 3DES diediedie Peter Gutmann
- Re: [TLS] [Cfrg] 3DES diediedie David McGrew (mcgrew)
- Re: [TLS] [Cfrg] 3DES diediedie Peter Gutmann
- Re: [TLS] [Cfrg] 3DES diediedie Derek Atkins
- Re: [TLS] [Cfrg] 3DES diediedie Hilarie Orman
- Re: [TLS] [Cfrg] 3DES diediedie Brian Sniffen
- Re: [TLS] [Cfrg] 3DES diediedie Hilarie Orman
- Re: [TLS] [Cfrg] 3DES diediedie Derek Atkins
- Re: [TLS] [Cfrg] 3DES diediedie Steven M. Bellovin
- Re: [TLS] [Cfrg] 3DES diediedie Joachim Strömbergson
- Re: [TLS] [Cfrg] 3DES diediedie Hilarie Orman
- Re: [TLS] [Cfrg] 3DES diediedie Joachim Strömbergson
- Re: [TLS] [Cfrg] 3DES diediedie Kyle Rose
- Re: [TLS] 3DES diediedie Richard Hartmann
- Re: [TLS] [Cfrg] 3DES diediedie Derek Atkins
- Re: [TLS] [Cfrg] 3DES diediedie Hilarie Orman
- Re: [TLS] [Cfrg] 3DES diediedie Ben Laurie
- Re: [TLS] [Cfrg] 3DES diediedie Ben Laurie
- Re: [TLS] [Cfrg] 3DES diediedie Joachim Strömbergson
- Re: [TLS] [Cfrg] 3DES diediedie Derek Atkins
- Re: [TLS] [Cfrg] 3DES diediedie Dave Garrett
- Re: [TLS] [Cfrg] 3DES diediedie Ira McDonald
- Re: [TLS] [Cfrg] 3DES diediedie Philip Levis
- Re: [TLS] [Cfrg] 3DES diediedie Peter Gutmann
- Re: [TLS] [Cfrg] 3DES diediedie Joachim Strömbergson
- Re: [TLS] [Cfrg] 3DES diediedie Ilari Liusvaara
- Re: [TLS] [Cfrg] 3DES diediedie Richard Hartmann
- Re: [TLS] [Cfrg] 3DES diediedie Peter Gutmann
- Re: [TLS] [Cfrg] 3DES diediedie Salz, Rich
- Re: [TLS] [Cfrg] 3DES diediedie Tony Arcieri
- Re: [TLS] [Cfrg] 3DES diediedie Peter Gutmann
- Re: [TLS] [Cfrg] 3DES diediedie Derek Atkins
- Re: [TLS] [Cfrg] 3DES diediedie Derek Atkins
- Re: [TLS] [Cfrg] 3DES diediedie Kyle Rose
- Re: [TLS] [Cfrg] 3DES diediedie Tony Arcieri
- Re: [TLS] [Cfrg] 3DES diediedie Yoav Nir
- Re: [TLS] [Cfrg] 3DES diediedie Kyle Rose