Re: [TLS] Maximum Fragment Length negotiation

2016-11-24 Thread Fossati, Thomas (Nokia - GB)
Hi Thomas, We encountered the same issue and suggested something similar in [1] -- although not at the same level of detail as you below. I like your proposal, but I'm not convinced that overloading the semantics of an already existing extension when used in combination with a specific version of

[TLS] Maximum Fragment Length negotiation

2016-11-24 Thread Thomas Pornin
Hello, I know that I am a bit late to the party, but I have a suggestion for the upcoming TLS 1.3. Context: I am interested in TLS support in constrained architectures, specifically those which have very little RAM. I recently published a first version of an implementation of TLS 1.0 to 1.2, that

Re: [TLS] record layer limits of TLS1.3

2016-11-24 Thread Vlad Krasnov
A) OpenSSL does not measure the actual TLS performance (including nonce construction, additional data, etc), but rather just the speed of the main encryption loop. B) Still, I agree with Yoav. From my experience, the difference in TPT between 16K records and 64K records is negligible, as well

Re: [TLS] Additional warnings on 0-RTT data

2016-11-24 Thread Colm MacCárthaigh
On Wed, Nov 23, 2016 at 10:44 PM, Christian Huitema wrote: > On Wednesday, November 23, 2016 7:20 PM, Colm MacCárthaigh wrote: > > > > Prior to TLS1.3, replay is not possible, so the risks are new, but the > end-to-end designers > > may not realize to update their threat model and just what is r

Re: [TLS] record layer limits of TLS1.3

2016-11-24 Thread Yoav Nir
> On 24 Nov 2016, at 15:47, Hubert Kario wrote: > > On Wednesday, 23 November 2016 10:50:37 CET Yoav Nir wrote: >> On 23 Nov 2016, at 10:30, Nikos Mavrogiannopoulos wrote: >>> On Wed, 2016-11-23 at 10:05 +0200, Yoav Nir wrote: Hi, Nikos On 23 Nov 2016, at 9:06, Nikos Mavrogianno

Re: [TLS] record layer limits of TLS1.3

2016-11-24 Thread Hubert Kario
On Wednesday, 23 November 2016 10:50:37 CET Yoav Nir wrote: > On 23 Nov 2016, at 10:30, Nikos Mavrogiannopoulos wrote: > > On Wed, 2016-11-23 at 10:05 +0200, Yoav Nir wrote: > >> Hi, Nikos > >> > >> On 23 Nov 2016, at 9:06, Nikos Mavrogiannopoulos > > That to my understanding is a way to reduce

[TLS] [Errata Verified] RFC5288 (4694)

2016-11-24 Thread RFC Errata System
The following errata report has been verified for RFC5288, "AES Galois Counter Mode (GCM) Cipher Suites for TLS". -- You may review the report below and at: http://www.rfc-editor.org/errata_search.php?rfc=5288&eid=4694 -- St