Re: use of digest key selector (was: summary of technical issues) (fwd)

Jim Galvin writes:
> Basically, including yet another algorithm identifier provides yet
> another opportunity for two users to fail to interoperate.  Although
> it's probably true that we'll just recommend exactly one (e.g., MD5),
> there's always the possibility that it will need to be changed.

If the digest algorithm used is the same as is used for digital signatures, 
is the opportunity for non-interoperability really increased by digesting
the public key also?

Phil