| GnuPG keys use the “public key approach” to encryption. Messages are sent once they have been encrypted by a public key. The messages can only be decrypted by a private key, held by the intended recipient. To add a GnuPG key: Make sure to use an appropriate expiration date. The expiration date is defined in years and describes when the key will no longer work; 1 year is the default. An existing key can be imported using the Import Key button. To import a GnuPG key: The key will automatically be installed onto your web server. Once a key-set has been added to the server, it can be deleted or viewed for copy from the main GnuPG page under the Public Keys and Private Keys heading.
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