nanog mailing list archives
Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC
From: Michael Thomas <mike () mtcc com>
Date: Mon, 8 Jul 2019 18:23:46 -0700
On 7/8/19 6:11 PM, Valdis Klētnieks wrote:
On Mon, 08 Jul 2019 17:58:17 -0700, Michael Thomas said:On 7/8/19 5:54 PM, Keith Medcalf wrote:This is because DKIM was a solution to a problem that did not exist.::eyeroll:: pray tell, how do you "always" know the identity of the MTA sending you a message?It's more subtle than that - you always know the "identity" of the purported MTA, because you know their IP address. Whether "purported" is the same as "legitimate" or "authorized" is a whole different kettle of fish.... Remember - port 25 is widely blocked precisely because there were always a plenty supply of MTAs whose identity you knew, sending you spam from consumer living rooms....
Like I said, what DKIM brought is the ability to "blame me". knowing the IP address doesn't give you that in any useful way. Recall that trust is mainly a social construct, not a technical one. Bruce Schneier has written about that endlessly.
Mike
Current thread:
- RE: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC, (continued)
- RE: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Keith Medcalf (Jul 08)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Michael Thomas (Jul 08)
- RE: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Keith Medcalf (Jul 08)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Michael Thomas (Jul 08)
- RE: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Keith Medcalf (Jul 08)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Christopher Morrow (Jul 08)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Michael Thomas (Jul 08)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Izzy Goldstein - TeleGo (Jul 09)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Michael Thomas (Jul 08)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Valdis Klētnieks (Jul 08)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Michael Thomas (Jul 08)
- RE: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Keith Medcalf (Jul 08)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Rich Kulawiec (Jul 10)
- RE: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Peter Beckman (Jul 10)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Sean Donelan (Jul 10)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Christopher Morrow (Jul 10)
- RE: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Keith Medcalf (Jul 10)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Paul Timmins (Jul 11)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Brian J. Murrell (Jul 11)
- Re: SHAKEN/STIR Robocall Summit - July 11 2019 at FCC Christopher Morrow (Jul 11)