Re: [ietf-dkim] Certifying the DKIM public key?

2011-05-23 Thread Dave CROCKER
On 5/22/2011 10:43 AM, John R. Levine wrote: VBR queries are about an actor, not a message. Certs can be coupled to a particular message -- this was an interesting semantic distinction about Goodmail's certification scheme -- although I believe that typically they, too, are only scoped to

Re: [ietf-dkim] Certifying the DKIM public key?

2011-05-23 Thread Michael Thomas
On 05/23/2011 11:17 AM, Dave CROCKER wrote: As an impressive example of even deeper misunderstanding: More of CROCKER's famed civility. On 5/22/2011 10:49 AM, Michael Thomas wrote: But this is exactly what DKIM is. You prove yourself fsvo prove to the registrar who certifies you

Re: [ietf-dkim] Certifying the DKIM public key?

2011-05-22 Thread Dave CROCKER
On 5/19/2011 3:17 PM, Murray S. Kucherawy wrote: -Original Message- From: ietf-dkim-boun...@mipassoc.org [mailto:ietf-dkim-boun...@mipassoc.org] On Behalf Of Rolf E. Sonneveld ... recently someone asked me whether it would have any added value if the DKIM public key, which is stored

Re: [ietf-dkim] Certifying the DKIM public key?

2011-05-22 Thread John R. Levine
through a separate, value-added mechanism. My own preference would be for using a special header-field that contains the cert, with the specification of using such certs as saying that they are enabled when included in the set of h= covered header fields. I don't see how this is

Re: [ietf-dkim] Certifying the DKIM public key?

2011-05-22 Thread Dave CROCKER
On 5/22/2011 10:27 AM, John R. Levine wrote: through a separate, value-added mechanism. My own preference would be for using a special header-field that contains the cert, with the specification of using such certs as saying that they are enabled when included in the set of h= covered

Re: [ietf-dkim] Certifying the DKIM public key?

2011-05-22 Thread John R. Levine
VBR queries are about an actor, not a message. Certs can be coupled to a particular message -- this was an interesting semantic distinction about Goodmail's certification scheme -- although I believe that typically they, too, are only scoped to the actor, not the specific content. Now

Re: [ietf-dkim] Certifying the DKIM public key?

2011-05-22 Thread Michael Thomas
On 05/22/2011 10:27 AM, John R. Levine wrote: It occurs to me that since mail certification is likely to make assertions about behavior as well as identity, the SSL model in which certs last for a year won't work, since behavior can change rapidly. Either the certifier has to issue a stream

Re: [ietf-dkim] Certifying the DKIM public key?

2011-05-22 Thread John R. Levine
But this is exactly what DKIM is. You prove yourself fsvo prove to the registrar who certifies you by virtue of placing your NS records in the root servers instead of issuing a cert. Registrars, as we all know, rarely check any credential beyond the confirmation code from the credit card

Re: [ietf-dkim] Certifying the DKIM public key?

2011-05-22 Thread J.D. Falk
On May 22, 2011, at 12:27 PM, John R. Levine wrote: It occurs to me that since mail certification is likely to make assertions about behavior as well as identity, the SSL model in which certs last for a year won't work, since behavior can change rapidly. Either the certifier has to issue

Re: [ietf-dkim] Certifying the DKIM public key?

2011-05-22 Thread Hector Santos
John R. Levine wrote: But this is exactly what DKIM is. You prove yourself fsvo prove to the registrar who certifies you by virtue of placing your NS records in the root servers instead of issuing a cert. Registrars, as we all know, rarely check any credential beyond the confirmation code

Re: [ietf-dkim] Certifying the DKIM public key?

2011-05-19 Thread Murray S. Kucherawy
-Original Message- From: ietf-dkim-boun...@mipassoc.org [mailto:ietf-dkim-boun...@mipassoc.org] On Behalf Of Rolf E. Sonneveld Sent: Thursday, May 19, 2011 2:33 PM To: IETF DKIM WG Subject: [ietf-dkim] Certifying the DKIM public key? Hi, all, recently someone asked me whether

Re: [ietf-dkim] Certifying the DKIM public key?

2011-05-19 Thread John Levine
recently someone asked me whether it would have any added value if the DKIM public key, which is stored in DNS, would be 'certified' in some (yet to be determined) way by a 3rd party like VeriSign, Thawte etc.? Sure. See RFC 5518. R's, John ___ NOTE