Comment by nickf
3 days ago
Not quite that simple, no. It's a good reason, and while CRL and OCSP don't really work well - CRLite/OneCRL, CRLsets and valid all go some way to making revocation reasonably effective. Having an effective way to rotate all certificates, quickly, is a bigger reason. 1k -> 2k RSA took too long. SHA1 -> SHA2 took waaaaay too long. Changing anything about the webPKI takes too long unless everyone is on short lifetimes. The post-quantum bogeyman looms, too. Heartbleed and unforced CA errors become way less of a problem is everyone is forced to rotate monthly.
Fair enough (I knew someone was going to come in here and whack me on this). I'd only say that this makes the overall argument for short-lifetime certs even stronger. :)
…and I didn’t even have to play the SC-081 sponsor card either ;)