I'm not aware of any use case where you would want to export only the public subkey, and it would not be usable without its primary in any case.
I can imagine a use case, it's just ... weird: if you need to verify signatures and certifications made with the corresponding private subkey *and* you're so space-confined you need to strip things down as far as possible, like you're in some embedded space on a ridiculously small PIC. I've seen environments where that requirement exists.

So, yeah, it's a weird one: an embedded environment so small you want to strip everything to the bone, but still powerful enough to run GnuPG. I'm not saying it's impossible, just ... weird, like someone confessing from the grave via a seance that there is in fact no life after death. It's the kind of thing to make you scratch your head and think things have gotten pretty weird around here.


Attachment: smime.p7s
Description: S/MIME Cryptographic Signature

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