All Facebook application are in the same App Group and therefore every application also has access to data that belongs to other applications within the App Group. And here it is important that WhatsApp is not storing the data encrypted on your hardware because this way - for example - the Facebook Messenger has access to your WhatsApp conversations and can send them to Facebooks servers. It is unclear if there are similar vulnerabilities present on Android devices. Maybe Facebook is happy enough by being able to read your SMS and your call history on Android devices.
It seems highly likely that all the privacy announcements by Facebook are just a big hoax, as it seems that Facebook is not engaged in trying to close all these exploits. You always have to keep in mind that Facebook is mainly an advertising company. The companies biggest asset is being able to offer highly targeted ads. And the most important ingredient to achieve this is fine-granular data of each user. Facebook will never stop collecting your data! I predict, thatFacebook's own cryptocurrency will deepen the privacy crisis. In the next article I will further discuss all privacy problems of Facebook's upcoming cryptocurrency, so please make sure to follow us on ;) ;) ;)