Re: [TLS] Last Call: (Deprecating TLSv1.0 and TLSv1.1) to Best Current Practice

2020-11-27 Thread Keith Moore
While I agree that TLSv1.0 and TLSv1.1 should be avoided as much as possible, I believe this document fails to consider that there are old systems that are still in use that cannot be upgraded.   Strict implementation of the MUST NOT rules in this document can even prevent those systems from be

Re: [TLS] [Last-Call] Last Call: (Deprecating TLSv1.0 and TLSv1.1) to Best Current Practice

2020-11-27 Thread Keith Moore
On 11/27/20 9:53 PM, Eric Rescorla wrote: Keith, Thanks for your note. Most of the general points you raise here were discussed when the TLS WG decided to move forward with this draft [0], though perhaps some of that is not reflected in the text. Of course that doesn't make this points invali

Re: [TLS] [Last-Call] Last Call: (Deprecating TLSv1.0 and TLSv1.1) to Best Current Practice

2020-11-27 Thread Keith Moore
On 11/27/20 11:30 PM, Eric Rescorla wrote: Well, I can't speak to how it sounds to you, but it's not a marketing argument but rather a security one. This is easiest to understand in the context of the Web, where you have a reference that contains one bit: http versus https,and all https content

Re: [TLS] [Last-Call] Last Call: (Deprecating TLSv1.0 and TLSv1.1) to Best Current Practice

2020-11-27 Thread Keith Moore
On 11/27/20 11:58 PM, Eric Rescorla wrote: To clarify, my suggestion was that https with TLS < 1.2 be treated as insecure, not as neither secure nor insecure or any kind of "in between". Well, the problem is that it is secure from the perspective of the site author but insecure fr

Re: [TLS] Last Call: (Deprecating TLSv1.0 and TLSv1.1) to Best Current Practice

2020-11-30 Thread Keith Moore
On 11/30/20 7:29 PM, Peter Gutmann wrote: So I think the text should include wording to the effect that it applies to public Internet use but not to embedded/SCADA/etc for which very different considerations apply. I've been thinking something like this also.  But IMO there are still valid ca

Re: [TLS] [Last-Call] Last Call: (Deprecating TLSv1.0 and TLSv1.1) to Best Current Practice

2020-12-01 Thread Keith Moore
On 12/1/20 4:29 AM, Peter Gutmann wrote: I think all it needs is something along the lines of "This BCP applies to TLS as used on the public Internet [Not part of the text but meaning the area that the IETF creates standards for]. Not specifically relevant to this draft, but:  Is it actually d

Re: [TLS] [Last-Call] Last Call: (Deprecating TLSv1.0 and TLSv1.1) to Best Current Practice

2020-12-02 Thread Keith Moore
On 12/2/20 5:37 AM, Peter Gutmann wrote: If a device can be at all critical (and even if it isn’t), then it should be upgraded or replaced. The fact that many of these devices are extremely critical is precisely why they're never replaced or upgraded, because they can't be taken out of producti