End-to-end encryption will be optional for voice and video calls between two users, the Facebook Messenger platform indicated on its official blog.
This means that the content of the communications cannot be seen by anyone other than the participants.
WhatsApp already had encryption built in, as Facebook recalls.
Disappearing messages receive changes
Now users will be able to choose whether messages that disappear on Facebook Messenger are available for five seconds up to 24 hours.
What’s coming to Facebook Messenger… and Instagram
Facebook Messenger will begin testing end-to-end encryption for group audio and video calls.
Instagram will also have the option for Direct Messages (DM) to have end-to-end encryption. This will first be tested with adults in select countries.