[phicoh]

A linked list of each authoritative name in the zone. Not a list of zones.

That's for offline signing. For online signing you can do different things.

But the point is, and that's what this discussion is about is that DNSSEC can evolve. It can get extra features to make online signing more efficient.

The problem is that getting all validating recursive resolvers and other validators to update takes a very long time, on the order of decades.

So we got this problem because people started using this feature without verifying that validator support had spread wide enough.

[tptacek]

At this point, with this microscopic level of adoption and this track record of instability, and given that we're now 4 major revisions (all premised on the same original service model that TIS came up with in the mid-1990s), it would make a lot more sense to go back to the drawing board.

That's basically what we did with DoH, a protocol that has drastically more deployment than DNSSEC and a more coherent threat model.

The simplest and most obvious thing you could do, if you were being parsimonious about it, would be to switch to an online-signer model. With modern (circa 2005) cryptography, you'd do a straightforward client/server authenticated denial without any of the record-chaining silliness. A big chunk of the complexity of the protocol would just vanish.