Hello,

>>>>> In <e8632056-d7b7-4ed6-91d6-7d9089c82f94@well-done.deisui.org> 
>>>>>	Daiki Ueno <ueno@unixuser.org> wrote:
> > Right now, pgg assume that gpg will need a passphrase so it asks the
> > user for one.  It may be better if pgg postpone the passphrase query
> > until gpg tell pgg that it needs a passphrase.  Then it is only
> > queried for when it is needed.  This should be more reliable, but
> > slightly more complicated to implement (asynchronous code).

> Anyway, I'll try to implement this.

Could you please try the attached pgg-gpg.el?

Please note, this patch is only for review, not meant to be committed now.