Facebook messenger users- be ready to make a choice, you may have an additional privacy in sending messages through Facebook messenger app.
The social network Facebook might add a new end-to-end encryption feature in its messenger app. This is specially meant to block Facebook from reading users texts. These encryption measures would make messages sent through app even more secure. Its an optional encrypted mode, in order to enable users must opt for the same.
This encryption method is different from the encryption method implemented by the Facebook last month in its owned app WhatsApp which enabled end-to-end encryption by default.
The difference is that messenger encryption would be expense, for some of the newer artificial intelligence efforts by Facebook, including its bots. Messenger bots, in order to get replying better it will learn from users messages which should definitely save users messages in Facebook database servers. But here this article pointing out that fully end-to-end messages can be accessed only by the sender or receiver.
Based on the earlier reports by Facebook in the wake of the Apple vs. FBI, we can believe that Facebook is focusing into encryption of messages in messenger.
Not only Facebook, many other companies are focusing on security measures in their apps.