How to set up your GnuPG

Download

Download GnuPG for your platform:

For Linux it's normally available using your distro's package manager.

Setup your Key pair

After installed, open Kleopatra:

Choose file -> new certificate:

Choose "Create Personal OpenPGP Key Pair":

Fill the form with your seller name and a FAKE OR ANONYMOUS email address (email address can be extracted from your Public Key):

If you leave it with default options you'll get an 2048 bit RSA key good for encrypt and sign.

In the screen you'll be prompted to create a passphrase for your certificate.

It's recommended that you create a backup copy of your certificate:

Next right-click on your new certificate from the list, and choose "Export Certificates...":

You will create an .asc file, after exported open it with a text editor, like notepad

That file will look like this, and that's your public key:

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v2.0.17 (MingW32)
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=SHpw
-----END PGP PUBLIC KEY BLOCK-----

Select all, including the headers and footer (those -----BEGIN... and ----END...) and paste it to your Public Key field.