Facebook-owned messaging service WhatsApp introduced full end-to-end encryption yesterday, previously only available for one-to-one text messages. The service’s one billion-plus users can now securely share an array of messages and content that will only be accessible by the sender and recipient. According to The New York Times, “it will be applied to photos, videos and group text messages sent among people in more than 50 languages across the world, including India, Brazil and Europe.” The update will also make it more difficult for law enforcement to access digital data, which could fuel the debate over personal privacy vs. national security.