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Copy the entire output of the key generator including comments to paste into the string.
i.e. include "-----BEGIN PGP PUBLIC KEY BLOCK-----..."
The string uses javascript backticks and not quotes. This is to allow a multi-line string so that you do not have to replace any line breaks with new-line characters. Be aware of any auto indenting by your editor that may introduce spaces to the public key and cause encryption to fail.
We use asymmetric public-key cryptography of the PGP methodology. Organization/Group, Repository, Raw Value - all information you provide on the encryption page is secured with this approach.