On Jan 9, 2014, at 6:17 PM, Viktor Dukhovni <[email protected]> wrote:

> How does this bear on the encoding lookup key labels? Any encoding
> (e.g. base32, or HMAC-SHA-224, but not punycode) that does not map
> input strings that differ only in case to output strings that differ
> only in case offers no advantage over a 1-way hash function.
> 
> I am not sure what you're getting at.  Perhaps I'm missing something.

The person looking up someone's S/MIME or PGP cert either knows how the LHS is 
spelled (including exact case, and character encoding) or they don't. This 
issue is for a layer that is not ours.

--Paul Hoffman
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