Facebook now offers users the ability to encrypt their notification emails using PGP, a freely available encryption method proven to thwart NSA surveillance. It’s the latest attempt by social media and other Internet providers to offer increased privacy to their users in the wake of the Edward Snowden leaks.
PGP, which stands for “Pretty Good Privacy,” is a freely available encryption standard that’s been available for decades. PGP encryption works through a technique called asymmetric encryption. Users of the software create both a private and a public encryption key. The public key can be shared freely with anyone who wants to send encrypted messages, and those messages can only be read by the person who holds the private key and its associated password.
The new feature, launched Monday, offers users the option to upload a public PGP key to Facebook. With this feature enabled, Facebook notification emails will only be legible to their intended recipient, using the corresponding password and private encryption key. Without encryption, anyone with access to a user’s email (potentially including hackers, police, or government agencies) could read the contents of private messages included in some notification emails.
