Re: [TLS] chairs - please shutdown wiretapping discussion...
Russ Housley <housley@vigilsec.com> Mon, 10 July 2017 22:32 UTC
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From: Russ Housley <housley@vigilsec.com>
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Date: Mon, 10 Jul 2017 18:32:22 -0400
Cc: "Polk, Tim (Fed)" <william.polk@nist.gov>, IETF TLS <tls@ietf.org>
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To: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Subject: Re: [TLS] chairs - please shutdown wiretapping discussion...
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Stephen: >>>> >>>>> And to avoid a repeat of Russ' failed justification, many protocols >>>>> use and depend on TLS where the entity controlling the TLS server >>>>> private key materials is not the higher layer sender or receiver, >>>>> so all four points in the definition in 2804 are fully met by your >>>>> wiretapping scheme. >>>> >>>> It is clear that you do not agree with the reasoning that I posted on >>>> Friday. Some people do, and clearly, others do not. >>>> >>>> So, I failed to convince you. However, you have also failed to >>>> convince me that the proposal is wiretapping under the definition in >>>> RFC 2804, Section 3. >>> >>> Consider SMTP/TLS. Where one MTA on the path supports this. >>> Say it's one operated by an anti-spam company for example. >>> That is clearly not the sender nor recipient. >>> >>> That meets all 4 points in 2804, right? >> >> You are pointing to email. Some MTAs will use SMTP over TLS, but many others do not. It would be great if they all do, especially for the authentication. In your response you are talking about an email system that has been using plaintext for ages, and you are trying to apply hop-by-hop a mechanism to the delivery. Then, you are saying that the sender and receiver have confidentiality expectations that are being violated. I do not buy it. > > See [1]. > > Those show nearly 90% of mails being encrypted with > TLS now. > > In many mail deployments there will be an added hop e.g. > for anti-spam (we do that here in tcd) to an outside > party. > > While not 100% of mail is encrypted with TLS on all > hops, much is. (And the UTA WG are developing MTA-STS > to try improve that.) > > If one of those external parties implements your > scheme then mail senders and receivers will not know and > that real TLS application meets the 2804 definition for > lots and lots and lots of emails. > > Hence, 2804 applies here and the standards-track label > ought be removed. > > S. > > [1] https://www.google.com/transparencyreport/saferemail/ I'm glad that TLS is being used to protect email delivery. I do not see how this changes the expectation discussed in RFC 2804, Section 3, Item number 3. Russ
- [TLS] chairs - please shutdown wiretapping discus… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Yaron Sheffer
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Paul Turner
- Re: [TLS] chairs - please shutdown wiretapping di… Tony Arcieri
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Tony Arcieri
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Yoav Nir
- Re: [TLS] chairs - please shutdown wiretapping di… Russ Housley
- Re: [TLS] chairs - please shutdown wiretapping di… Tony Arcieri
- Re: [TLS] chairs - please shutdown wiretapping di… Eric Mill
- Re: [TLS] chairs - please shutdown wiretapping di… Colm MacCárthaigh
- Re: [TLS] chairs - please shutdown wiretapping di… Dan Brown
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Sean Turner
- Re: [TLS] chairs - please shutdown wiretapping di… Polk, Tim (Fed)
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Nikos Mavrogiannopoulos
- Re: [TLS] chairs - please shutdown wiretapping di… Ackermann, Michael
- Re: [TLS] chairs - please shutdown wiretapping di… Colm MacCárthaigh
- Re: [TLS] chairs - please shutdown wiretapping di… Sean Turner
- Re: [TLS] chairs - please shutdown wiretapping di… Yoav Nir
- Re: [TLS] chairs - please shutdown wiretapping di… Nico Williams
- Re: [TLS] chairs - please shutdown wiretapping di… Blumenthal, Uri - 0553 - MITLL
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Nico Williams
- Re: [TLS] chairs - please shutdown wiretapping di… Watson Ladd
- Re: [TLS] chairs - please shutdown wiretapping di… Ackermann, Michael
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Ackermann, Michael
- Re: [TLS] chairs - please shutdown wiretapping di… Sean Turner
- Re: [TLS] chairs - please shutdown wiretapping di… Russ Housley
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Russ Housley
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Russ Housley
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Eric Mill
- Re: [TLS] chairs - please shutdown wiretapping di… Jeffrey Walton
- Re: [TLS] chairs - please shutdown wiretapping di… Watson Ladd
- Re: [TLS] chairs - please shutdown wiretapping di… Ted Lemon
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Ted Lemon
- Re: [TLS] chairs - please shutdown wiretapping di… Ackermann, Michael
- Re: [TLS] chairs - please shutdown wiretapping di… Michael StJohns
- Re: [TLS] chairs - please shutdown wiretapping di… Christian Huitema
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Ted Lemon
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Ted Lemon
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Christian Huitema
- Re: [TLS] chairs - please shutdown wiretapping di… Ted Lemon
- Re: [TLS] chairs - please shutdown wiretapping di… Blumenthal, Uri - 0553 - MITLL
- Re: [TLS] chairs - please shutdown wiretapping di… Yoav Nir
- Re: [TLS] chairs - please shutdown wiretapping di… Ted Lemon
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Yoav Nir
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Nico Williams
- Re: [TLS] chairs - please shutdown wiretapping di… Bill Frantz
- Re: [TLS] chairs - please shutdown wiretapping di… Timothy Jackson
- Re: [TLS] chairs - please shutdown wiretapping di… Kyle Rose
- Re: [TLS] chairs - please shutdown wiretapping di… Ted Lemon
- Re: [TLS] chairs - please shutdown wiretapping di… Kyle Rose
- Re: [TLS] chairs - please shutdown wiretapping di… Ted Lemon
- Re: [TLS] chairs - please shutdown wiretapping di… Richard Barnes
- Re: [TLS] chairs - please shutdown wiretapping di… Kyle Rose
- Re: [TLS] chairs - please shutdown wiretapping di… Ted Lemon
- Re: [TLS] chairs - please shutdown wiretapping di… Ted Lemon
- Re: [TLS] chairs - please shutdown wiretapping di… Kyle Rose
- Re: [TLS] chairs - please shutdown wiretapping di… Ilari Liusvaara
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Kyle Rose
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Kyle Rose
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell
- Re: [TLS] chairs - please shutdown wiretapping di… Kathleen Moriarty
- Re: [TLS] chairs - please shutdown wiretapping di… Stephen Farrell