An OpenPGP (also called GnuPrivacyGuard) key allows you to sign documents, such as emails or text files, using a digital key.There are two parts to an OpenPGP key: one public that you share with the world and the other private, which you should guard closely. Both are standard text files that make up a digital signature.
In Launchpad, you can use your OpenPGP key to identify yourself when using the bug tracker's email interface, when uploading distribution packages and when signing a code of conduct.
Generating an OpenPGP Key
Publishing your key
Your key is useful only if other people can verify items that you sign. By publishing your key to a keyserver, which acts as a directory of people's public keys, you can make your public key available to anyone else.
Before you add your key to Launchpad or elswhere, you need to push it to (for exemple) the Ubuntu keyserver.
Using Passwords and Encryption KeysStep 1 Open Passwords and Encryption Keys.
Step 2 Select the My Personal Keys tab, select your key.
Step 3 Select Remote > Sync and Publish Keys from the menu. Choose the Syncbutton. (You may need to add hkp://keyserver.ubuntu.com to your key servers if you are not using Ubuntu.)
It can take up to thirty minutes before your key is available to Launchpad. After that time, you're ready to import your new key into Launchpad!
Renewing your keyYou may have set your key to expire. You can update your key and republish it.
Step 1 Open Passwords and Encryption Keys.
Step 2 Select the My Personal Keys tab, select your key, and open the property window by pressing Space Bar our double clicking with your pointer.
Step 3 Set a new expiration date or choose never.
See the Publishing your key section above.
More about GPG
Importing Your PGP Key > at Launchpad Help has more information about using OpenPGP with Launchpad and provides examples using the GPG command found on most Linux distributions. Read the Ubuntu community's guide to OpenPGP keys > to learn about how to other uses.