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There are many ways to crack something secured by a single password. GPG uses a passphrase: a short phrase or sentence. Use one that’s easy for you to remember but would be hard for somebody else to guess (for example, something based on a little-known personal interest). Use capital letters, punctuation, and numbers in the passphrase to expand the search space for anyone trying to crack it. It should be at least three or four words long.

"Who won the War of 1812?" is an example of a passphrase that meets the criteria. As for keeping it secure, a Post-It on your monitor is A Bad Idea. A copy put in your safe-deposit box is a better idea.

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