Re: [TLS] [ALU] Re: extending the un-authenticated DTLS header

2016-11-16 Thread Kraus Achim (INST/ESY1)
Hi, I'm still wondering, why the "clashing" calculations (section 4) are only based on the number of clients and not also on the length of the hash chain. As I understood the hash chain, the DTLS server and client calculates a list of CIDs. Though the client chose one, the server has to prepare

Re: [TLS] TLS Visibility Inside the Data Center (was: I-D Action: draft-green-tls-static-dh-in-tls13-00.txt)

2016-11-16 Thread Matthew Green
Thanks for pointing out the line in Appendix D.1. I also agree that the proposal requires no changes to the current 1.3 specification, which is very much a point in its favor. I don’t think there is a desired action from the TLS-WG. The goal is simply to have a document that other implementers

Re: [TLS] TLS Visibility Inside the Data Center (was: I-D Action: draft-green-tls-static-dh-in-tls13-00.txt)

2016-11-16 Thread Dan Brown
Isn’t possible to achieve the goals of this proposal without re-using DH secrets? For example, let DH_secret = KDF ( monitoring_key, server.hello , client.hello), or something similar. Ideally, the monitoring_key should be updated frequently as possible (while keeping it synchronized). From:

Re: [TLS] TLS Visibility Inside the Data Center (was: I-D Action: draft-green-tls-static-dh-in-tls13-00.txt)

2016-11-16 Thread Salz, Rich
> Isn’t possible to achieve the goals of this proposal without re-using DH > secrets? > For example, let DH_secret = KDF ( monitoring_key, server.hello , > client.hello), or something similar. Ideally, the monitoring_key should be > updated frequently as possible (while keeping it synchronized

Re: [TLS] COSIC's look on TLS 1.3

2016-11-16 Thread Roel Peeters
Hi Dave, We are wondering because of this piece of text from the RFC EDITOR just above paragraph 4.1.4 on Hello Retry Request: RFC EDITOR: PLEASE REMOVE THE FOLLOWING PARAGRAPH Implementations of draft versions (see Section 4.2.1.1) of this specification SHOULD NOT implement this mechanism on

Re: [TLS] COSIC's look on TLS 1.3

2016-11-16 Thread Eric Rescorla
This paragraph refers to the anti-downgrade mechanism described in 4.1.3. -Ekr On Wed, Nov 9, 2016 at 6:56 AM, Roel Peeters wrote: > Hi Dave, > > We are wondering because of this piece of text from the RFC EDITOR just > above paragraph 4.1.4 on Hello Retry Request: > > RFC EDITOR: PLEASE REMOV