Hi Christian

There may be ways in some environments to push updates, but it's neither 
universal nor reliable. So the perception is correct. It's not much different 
from waiting for the NextUpdate time of the CRL.

And the solution is also the same: short TTLs, frequent CRL updates, short 
response validity interval.  With either technology it's a trade-off between 
timely revocation and load on the issuer.

Yoav

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of 
Christian Becker
Sent: Sunday, March 03, 2013 12:16 PM
To: [email protected]
Subject: [dane] revocation of keys or certificates

Comparing PKIX and DANE I regularly get asked about the certificate revocation 
in DANE. To me revocation is straight forward: you change keys in the TLSA 
record. BUT what if the key was propagated with a large TTL to the caches of 
the worlds DNS servers. In that case the revocation process can only be 
considered done when the TTL has elapsed.

Is that the right perception and are there any solution for that, except of a 
recommendation to keep the TTL small?

Thanks,
Christian

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