For Android users, Whatsapp has now enabled the fingerprint lock feature. It's coming with the latest beta version i.e. 2.19.221. Due to this feature user can maintain privacy. To enable the fingerprint lock setting user need to
- Go to Whatsapp settings
- Fingerprint lock
If you have updated the new version but didn't get this feature then try backing up the chats and most importantly the feature requires the phone to be running on Android Marshmallow or higher, and feature a fingerprint scanner.
If the user enables this feature, then to gain access to their chats s/he needs to use fingerprint authentication to unlock WhatsApp.
After accessing the app there is an option to immediately lock after 1minute and after 30minutes. If you choose the immediate option then you need to authenticate every now and then. It totally depends on you choose it from given options. Another important feature is 'Show Content In Notification' so you can hide it if you don't want to show the messages in the notification. The widget content is hidden by default according to WhatsApp feature tracker WABetaInfo when the user enables a lock feature.
Img Src: techrounder
By the way this feature can actually prove to more secure and authentication process is managed by the Android System.Whatsapp is uses official Android APIs so no information is sent to Whatsapp/Facebook server.
Users will be able to see the feature in latest Android beta
it will roll out for the future stable apps ...