You also need to read the full AES key to your recipient. If you've already got a secure channel to your recipient, great: you can just paste them the key. But

You also need to read the full AES key to your recipient. If you've already got a secure channel to your recipient, great: you can just paste them the key. But if you're sitting next to a new friend at a conference and want to throw them a copy of your secret file without worrying about who else might be able to see it in the future, you might want something more.. ergonomic :).