On Mon, Jul 9, 2018 at 9:54 AM, Eric Rescorla <e...@rtfm.com> wrote: > Thanks for writing this. > > I would be in favor of deprecating old versions of TLS prior to 1.2. > Firefox Telemetry shows that about 1% of our connections are TLS 1.1 >
This should be 1.0. (on the same data set, TLS 1.3 is > 5%), and TLS 1.1 is negligible. > > This is probably a higher number than we'd be comfortable turning off > immediately, but it is probably worth starting the process. > > -Ekr > > > On Mon, Jul 9, 2018 at 9:40 AM, Kathleen Moriarty < > kathleen.moriarty.i...@gmail.com> wrote: > >> Hello, >> >> Stephen and I posted the draft below to see if the TLS working group >> is ready to take steps to deprecate TLSv1.0 and TLSv1.1. There has >> been a recent drop off in usage for web applications due to the PCI >> Council recommendation to move off TLSv1.0, with a recommendation to >> go to TLSv1.2 by June 30th. NIST has also been recommending TLSv1.2 >> as a baseline. Applications other than those using HTTP may not have >> had the same reduction in usage. If you are responsible for services >> where you have a reasonable vantage point to gather and share >> statistics to assess usage further, that could be helpful for the >> discussion. We've received some feedback that has been incorporated >> into the working draft and feelers in general have been positive. It >> would be good to know if there are any show stoppers that have not >> been considered. >> >> https://github.com/sftcd/tls-oldversions-diediedie >> >> Thanks in advance, >> Kathleen >> >> >> ---------- Forwarded message ---------- >> From: <internet-dra...@ietf.org> >> Date: Mon, Jun 18, 2018 at 3:05 PM >> Subject: New Version Notification for >> draft-moriarty-tls-oldversions-diediedie-00.txt >> To: Stephen Farrell <stephen.farr...@cs.tcd.ie>, Kathleen Moriarty >> <kathleen.moriarty.i...@gmail.com> >> >> >> >> A new version of I-D, draft-moriarty-tls-oldversions-diediedie-00.txt >> has been successfully submitted by Stephen Farrell and posted to the >> IETF repository. >> >> Name: draft-moriarty-tls-oldversions-diediedie >> Revision: 00 >> Title: Deprecating TLSv1.0 and TLSv1.1 >> Document date: 2018-06-18 >> Group: Individual Submission >> Pages: 10 >> URL: >> https://www.ietf.org/internet-drafts/draft-moriarty-tls-oldv >> ersions-diediedie-00.txt >> Status: >> https://datatracker.ietf.org/doc/draft-moriarty-tls-oldversi >> ons-diediedie/ >> Htmlized: >> https://tools.ietf.org/html/draft-moriarty-tls-oldversions-diediedie-00 >> Htmlized: >> https://datatracker.ietf.org/doc/html/draft-moriarty-tls-old >> versions-diediedie >> >> >> Abstract: >> This document [if approved] formally deprecates Transport Layer >> Security (TLS) versions 1.0 [RFC2246] and 1.1 [RFC4346] and moves >> these documents to the historic state. These versions lack support >> for current and recommended cipher suites, and various government and >> industry profiiles of applications using TLS now mandate avoiding >> these old TLS versions. TLSv1.2 has been the recommended version for >> IETF protocols since 2008, providing sufficient time to transition >> away from older versions. Products having to support older versions >> increase the attack surface unnecessarily and increase opportunities >> for misconfigurations. Supporting these older versions also requires >> additional effort for library and product maintenance. >> >> This document updates the backward compatibility sections of TLS RFCs >> [[list TBD]] to prohibit fallback to TLSv1.0 and TLSv1.1. This >> document also updates RFC 7525. >> >> >> >> >> Please note that it may take a couple of minutes from the time of >> submission >> until the htmlized version and diff are available at tools.ietf.org. >> >> The IETF Secretariat >> >> >> >> -- >> >> Best regards, >> Kathleen >> >> _______________________________________________ >> TLS mailing list >> TLS@ietf.org >> https://www.ietf.org/mailman/listinfo/tls >> > >
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