Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Ben Laurie
On 8 October 2013 22:14, Stephen Farrell wrote: > > > Hi, > > Steve's mail argues for the current IETF position that > mandatory-to-implement (MTI) is the correct target IETF > specifications. > > Some folks (me included to be honest) wonder if the current > situation argues for raising the bar th

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Moriarty, Kathleen
Hi Stephen, I'll respond in line to clarify my initial email. Thanks, Kathleen -Original Message- From: Stephen Farrell [mailto:stephen.farr...@cs.tcd.ie] Sent: Tuesday, October 08, 2013 9:34 PM To: Moriarty, Kathleen; Peterson, Jon; perpass Subject: Re: [perpass] mandatory-to-implement

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Stephen Kent
Ben, O... How about a distinction in compliance? That is, you can say you comply to RFC xyzw if you implement it, but to say you _securely_ comply, you have to switch on the MTUFS (mandatory to use for security) and switch off MTNUFS (mandatory to not use for security) features in the RFC. Some

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Ben Laurie
On 9 October 2013 16:55, Stephen Kent wrote: > Ben, > >> O... >> >> How about a distinction in compliance? That is, you can say you comply >> to RFC xyzw if you implement it, but to say you _securely_ comply, you >> have to switch on the MTUFS (mandatory to use for security) and switch >> off MTNU

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Stephen Kent
Stephen, Thanks for creating a new thread to discuss this topic. It's a good starting point for an important discussion. I think MTU (vs. MTI) is a very hard argument to make, for several reasons, some of which I noted in my response to Dean. Internet protocols are used in a very, very wide

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Stephen Kent
Ben, ... It's all about incentives. Why would anyone care right now whether an RFC is a standard or not? No-one beats them up for complying with non-standards. Or even failing to comply with standards. That does not seem to be uniformly true. Some folks who purchase equipment have been know to r

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Ben Laurie
On 9 October 2013 18:33, Stephen Kent wrote: >> We need to make these things visible (and I don't mean "show a >> padlock", btw, I mean the kind of visibility we propose for >> Certificate Transparency, namely, if it doesn't work right, you don't >> connect). > > Ben, please stop pushing CT as the

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Stephen Kent
Ben, Sorry if I misinterpreted your comment in this context. Steve ... Ben, please stop pushing CT as the solution for everything; it's become more than tiresome. I was not pushing CT in any way! I was pushing for visibility that is not a padlock, since we know that doesn't work.

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Ben Laurie
On 9 October 2013 18:33, Stephen Kent wrote: > Ben, > ... > >> It's all about incentives. Why would anyone care right now whether an >> RFC is a standard or not? No-one beats them up for complying with >> non-standards. Or even failing to comply with standards. > > That does not seem to be uniform

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Richard Shockey
Well from a SIP perspective we have always had mandatory to implement TLS in any number of specifications but in practice no one uses it. No one. No one cares. -Original Message- From: perpass-boun...@ietf.org [mailto:perpass-boun...@ietf.org] On Behalf Of Stephen Farrell Sent: Tuesday,

Re: [perpass] A proposal for developing PRISM-Proof email (default deny)

2013-10-09 Thread Bjoern Hoehrmann
* Mike Demmers wrote: >TThe basic concept of default deny for encrypted emails only seems very >'right' to >me, because if you are going to the trouble to do this, and handle things like >key exchanges, that communication must be pretty special to begin with. Why >would >you want 'just anyone' to

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Peterson, Jon
For PSTN replacement deployments in effectively private networks, the case for transport-level security is unconvincing, sure. To Steve Kent's earlier point, documents that explain why strong security is a best practice for particular environments would do better than a blanket assertion that SIP

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Stephen Farrell
On 10/09/2013 11:44 PM, Peterson, Jon wrote: > A BCP could > however provide the necessary motivation for using TLS in the situations > where it will actually help, and the recent revelations make that case > rather eloquently. I'm confused by that a bit - given the GCHQ/Belgacom example, in whi

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Peterson, Jon
I suspect your confusion surrounds who exactly would be helped and what that help would be. All I was saying is that there are deployments whose operators and implementers don't perceive the need for such help, and that we're unlikely to persuade them of it. Making TLS MTU for SIP would have no ap

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Stephen Farrell
On 10/10/2013 12:21 AM, Peterson, Jon wrote: > > I suspect your confusion surrounds who exactly would be helped and what > that help would be. All I was saying is that there are deployments whose > operators and implementers don't perceive the need for such help, I agree with that. > and that

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Stephen Farrell
On 10/09/2013 09:55 PM, Richard Shockey wrote: > Well from a SIP perspective we have always had mandatory to implement TLS in > any number of specifications but in practice no one uses it. No one. No one > cares. BTW - thanks Rich - I think saying what really happens is very helpful. Pretend

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Stephen Farrell
Hi Steve, On 10/09/2013 06:22 PM, Stephen Kent wrote: > Stephen, > > Thanks for creating a new thread to discuss this topic. It's a good > starting point for > > an important discussion. I agree its important. > I think MTU (vs. MTI) is a very hard argument to make, for several reasons, > som

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Richard Shockey
+1 .. unlikely is a mild word. I would have probably used the words never persuade them. -Original Message- From: Peterson, Jon [mailto:jon.peter...@neustar.biz] Sent: Wednesday, October 09, 2013 7:21 PM To: Stephen Farrell; Richard Shockey; 'perpass' Subject: Re: [perpass] mandatory-to-i

Re: [perpass] mandatory-to-implement vs. more?

2013-10-09 Thread Christian Huitema
> For me, the question is: Nobody uses SIP/TLS now. Using SIP/TLS > would add some value. How can we make it more likely they do use > SIP/TLS? Define "nobody," please. Microsoft Lync uses SIP/TLS by default. That must be more than "nobody." -- Christian Huitema