When I use
gpg --symmetric --s2k- and press tab some options appear:
--s2k-cipher-algo --s2k-count --s2k-digest-algo --s2k-mode
What do those options do?
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In GnuPG 1.4.12 defaults are (found experimentally):
You can see how your existing keys are encrypted by typing
But all algorithms supported by GnuPG can be efficiently automated at GPUs. So I suggest to use side implementation of