Your Facebook account is about to get a whole lot safer. The social network just introduced new strong encryption features that will help preserve the privacy of your messages and emails. Not everyone is happy about the change, though. The government and law enforcement, for example, are dead set against it.
Facebook is now letting users add OpenPGP public keys to their profile to allow other users to contact them securely. Facebook users can also opt to receive encrypted email notifications from Facebook using their public and private keys. Even if a hacker broke into your email account, they wouldn't be able to read your messages from Facebook with this option enabled.
Public keys are how people communicate with most popular encryption products. Every user has a public and a private key — the public is shared freely, while the private is kept secret. Anyone can encrypt a message using someone else's public key, which can then only be decrypted by the owner of that public key — using their private key.
You can add OpenPGP public keys to your profile on the Contact and Basic Info section of the About page from a desktop computer. If you're interested in this feature, Facebook has provided additional information and direction to help you get started.