Hello Nico,

> I don't believe that using Kerberos helps on the _entropy_ side as much
> as on the PQ side.

Ah; I meant to (be terse and) say that it adds an independent source of entropy 
that leaves no traces in the TLS flow subject to, indeed, Quantum Computer 
cracking.

> Now, the biggest problem with Kerberos is that with manually-keyed
> cross-realm trusts doesn't scale to Internet scale.  But there's a way
> to fix that too: use PQ PK with PKINIT as a form of "PKCROSS", and now
> Kerberos can function as a way of amortizing PQ PK costs.

Indeed :- though I'd have mentioned KXOVER or Kerberos Realm Crossover,
https://gitlab.com/arpa2/kxover
This is founded on DNSSEC, DANE and TLS.

Thanks,
 -Rick

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