1 sep 2018 kl. 00:42 skrev Robert Moskowitz <rgm at htt-consult.com>: > On 08/31/2018 05:54 PM, John R. Dennison wrote: >> On Fri, Aug 31, 2018 at 05:30:53PM -0400, Robert Moskowitz wrote: >>> Letsencrypt is a very important development, but it has (IMHO) a shaking >>> foundation. I would not build a production system around it. But then I >>> have lived in aspects of PKI since '95... >> I presume you meant "shaky foundation"? > > Yes. I am not in California (or similar earthquake place!) Good old stable Michigan (we do get mild ones once in a while. :) > >> If so, would you care to elaborate > > It is designed for getting web servers quickly into TLS and then to a more stable provider. "Make the web safe for all". If your content is short information, your contacts will never notice that you go to a new cert quarterly. Long-term users might also never see this, but I can see web services where a new cert every 90 days will cause a pain point. > > And for other services like IMAP, SMTP, LDAP (maybe not LDAP) constant changing certs even with a long lived root may get old for your customers. > > Plan on this to 'get into the pool', but not to live with it for more than a year. > > Unfortunately, there has never been an effective business model for small customers. > > We are kind of close with DMARC, but I think it misses the mark. Putting your domain root cert into your DNSSEC signed domain should be all that is needed to establish a rooted trust. > > I have to speak with some IETF colleagues on this (particularly in DNSSEC and DMARC).... I'm not sure I still see the point you're trying to make. What actual practical and concrete problems are you suggesting may arise in the situations you touch on above? As far as I know, if you have a properly set up LE certificate for a service, and renew it regularly, clients will not have a problem with this. They trust the root CA, and when you renew/replace the certificate, they will happily trust the new one, over and over again. Considering all relevant root trust stores now contain LE's CA, it's here to stay from what I can tell, not to mention it's working well so far.