How to backup gpg keys on paper

Having a reliable backup of our GPG (Gnu Privacy Guard) secret key is not optional: the key represents our identity, and loosing it could potentially be a disaster. Creating a backup of our keys and sub-keys is quite a simple thing to do using gpg, and the resulting files can be easily backed up on one or more devices. Electronic devices such USB drives or hard disks, however, tend to fail, and usually in the most inappropriate times; therefore as an extreme resort, we may want to print our keys to paper.

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