Re: [ietf-dkim] Key rotation

2010-09-10 Thread Jeff Macdonald
On Thu, Sep 9, 2010 at 5:21 PM, J.D. Falk jdfalk-li...@cybernothing.orgwrote: On Sep 9, 2010, at 9:57 AM, Mark Martinec wrote: Rumor has is that some large players (such as Yahoo!) are disregarding such ephemeral property of a selector and are trying to associate a reputation scheme based

Re: [ietf-dkim] Key rotation

2010-09-10 Thread Alex Soto
On Fri, Sep 10, 2010 at 6:55 AM, Jeff Macdonald macfisher...@gmail.comwrote: On Thu, Sep 9, 2010 at 5:21 PM, J.D. Falk jdfalk-li...@cybernothing.orgwrote: On Sep 9, 2010, at 9:57 AM, Mark Martinec wrote: Rumor has is that some large players (such as Yahoo!) are disregarding such

Re: [ietf-dkim] Key rotation

2010-09-10 Thread Mark Delany
http://feedbackloop.yahoo.net/ Step 2 doesn't help. (yes, you can put * for all selectors, but asking for one when it isn't really needed leads to FUD). A selector can of course be in a sub-domain format, such as september.dialup._domainkey.example.net I wonder if they considered letting

Re: [ietf-dkim] Key rotation

2010-09-10 Thread John R. Levine
I wonder if they considered letting you enter *.dialup or somesuch? I dunno, but I think the last time something like this came up, we agreed that if you want to have two separate reputation streams, they should have different d= rather than different selectors. R's, John

Re: [ietf-dkim] Key rotation

2010-09-09 Thread Mark Martinec
Mark Delany wrote: I believe the general thrust is that DKIM keys are ephemeral so no one should rely on there long-term presence. [...] With each key there is an associated selector:domain pair, so with a key rotation comes the change of a selector. Such a purpose of a selector is clearly

Re: [ietf-dkim] Key rotation

2010-09-09 Thread MH Michael Hammer (5304)
To: ietf-dkim@mipassoc.org Subject: Re: [ietf-dkim] Key rotation Mark Delany wrote: I believe the general thrust is that DKIM keys are ephemeral so no one should rely on there long-term presence. [...] With each key there is an associated selector:domain pair, so with a key rotation comes

Re: [ietf-dkim] Key rotation

2010-09-09 Thread Murray S. Kucherawy
-Original Message- From: ietf-dkim-boun...@mipassoc.org [mailto:ietf-dkim- boun...@mipassoc.org] On Behalf Of Mark Martinec Sent: Thursday, September 09, 2010 9:57 AM To: ietf-dkim@mipassoc.org Subject: Re: [ietf-dkim] Key rotation Mark Delany wrote: I believe the general thrust

Re: [ietf-dkim] Key rotation

2010-09-09 Thread McDowell, Brett
On Sep 4, 2010, at 9:31 PM, Steve Atkins wrote: The whole point of rotating keys is so that loss of an old private key isn't a risk. Given that, I think that even if you're fairly sure that a key pair hasn't been compromised then you should remove the public key as soon as is reasonable after

Re: [ietf-dkim] Key rotation

2010-09-09 Thread Michael Thomas
On 09/09/2010 11:12 AM, McDowell, Brett wrote: On Sep 4, 2010, at 9:31 PM, Steve Atkins wrote: The whole point of rotating keys is so that loss of an old private key isn't a risk. Given that, I think that even if you're fairly sure that a key pair hasn't been compromised then you should

Re: [ietf-dkim] Key rotation

2010-09-09 Thread Steve Atkins
On Sep 9, 2010, at 11:12 AM, McDowell, Brett wrote: On Sep 4, 2010, at 9:31 PM, Steve Atkins wrote: The whole point of rotating keys is so that loss of an old private key isn't a risk. Given that, I think that even if you're fairly sure that a key pair hasn't been compromised then you

Re: [ietf-dkim] Key rotation

2010-09-09 Thread Steve Atkins
On Sep 9, 2010, at 9:57 AM, Mark Martinec wrote: Mark Delany wrote: I believe the general thrust is that DKIM keys are ephemeral so no one should rely on there long-term presence. [...] With each key there is an associated selector:domain pair, so with a key rotation comes the change of a

Re: [ietf-dkim] Key rotation

2010-09-09 Thread Michael Thomas
On 09/09/2010 09:57 AM, Mark Martinec wrote: Mark Delany wrote: I believe the general thrust is that DKIM keys are ephemeral so no one should rely on there long-term presence. [...] With each key there is an associated selector:domain pair, so with a key rotation comes the change of a

Re: [ietf-dkim] Key rotation

2010-09-09 Thread McDowell, Brett
On Sep 9, 2010, at 2:26 PM, Steve Atkins wrote: On Sep 9, 2010, at 11:12 AM, McDowell, Brett wrote: I'd be surprised to discover many senders are rotating keys every eight days. I didn't suggest rotating keys every eight days. Rather, I suggested leaving the public keys in place for 8

Re: [ietf-dkim] Key rotation

2010-09-09 Thread J.D. Falk
On Sep 9, 2010, at 9:57 AM, Mark Martinec wrote: Rumor has is that some large players (such as Yahoo!) are disregarding such ephemeral property of a selector and are trying to associate a reputation scheme based on both the domain *and* the selector. That rumour is based on a presentation I

Re: [ietf-dkim] Key rotation

2010-09-09 Thread Mark Martinec
On Sep 9, 2010, at 9:57 AM, Mark Martinec wrote: Rumor has is that some large players (such as Yahoo!) are disregarding such ephemeral property of a selector and are trying to associate a reputation scheme based on both the domain *and* the selector. On Thursday September 9 2010 23:21:55

Re: [ietf-dkim] Key rotation

2010-09-04 Thread Mark Delany
On Sat, Sep 04, 2010 at 01:41:41PM -0700, Steve Atkins allegedly wrote: Do we have any thoughts on 1. how often keys might sensibly be rotated and 2. how long public keys should remain visible after the private key has been rotated out? I believe the general thrust is that DKIM keys are

Re: [ietf-dkim] Key rotation

2010-09-04 Thread Steve Atkins
On Sep 4, 2010, at 2:55 PM, Mark Delany wrote: On Sat, Sep 04, 2010 at 01:41:41PM -0700, Steve Atkins allegedly wrote: Do we have any thoughts on 1. how often keys might sensibly be rotated and 2. how long public keys should remain visible after the private key has been rotated out? I

Re: [ietf-dkim] Key rotation

2010-09-04 Thread Hector Santos
Mark Delany wrote: On Sat, Sep 04, 2010 at 01:41:41PM -0700, Steve Atkins allegedly wrote: Do we have any thoughts on 1. how often keys might sensibly be rotated and 2. how long public keys should remain visible after the private key has been rotated out? I believe the general thrust is

Re: [ietf-dkim] Key rotation

2010-09-04 Thread Hector Santos
Steve Atkins wrote: Do we have any thoughts on 1. how often keys might sensibly be rotated and 2. how long public keys should remain visible after the private key has been rotated out? The WG discussed this around 2006. The DKIM-RCVD I-D I wrote summarizes the timing issues from the