Do I understand correctly that secring.gpg is my private key?
From man gpg:
~/.gnupg/secring.gpg
The secret keyring. You should backup this file.
This file is protected by my passphrase, right?
If you install one, yes. Actually, the file itself is not protected, but each key contained can be (you can have several secret keys in your secret chain).
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--secret-keyring /path/to/secring.gpg gpg gpg.conf: secret-keyring /path/to/secring.gpg. - , , ? ? ,
gpg.
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