In article <[email protected]> you write:
>On Tue, 28 Feb 2017, Dale R. Worley wrote:
>
>> Well enough.  Actually, I thought about this issue some more, and that
>> led to my followup e-mail.  I think there is a real desire to not have
>> the DNS provide a direct catalog of valid e-mail addresses, but it
>> conflicts with the weak security of non-salted hashes.  As I said in
>> that e-mail, I think this could be improved by providing a hash in a DNS
>> record, which would mean that hashes would be well-justified as
>> providing substantially more privacy/security than direct UTF-8 (or
>> base64 or anything reversible).
>
>I don't think that justifies differentiating the lookups of OPENPGPKEY
>versus SMIMEA records. So even if I agreed with you, I think it is
>too late to change this.

They're experiments.  I'd think it'd be useful for the experiments to
see whether salted or unsalted hashes work better (or worse.)

R's,
John

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