Fake news on messaging platforms such as WhatsApp is a HUGE problem. Unlike on Facebook and Twitter it’s spread cannot be mapped, as these networks are highly social but not measurable. That they are end-to -end encrypted (protect privacy of senders and maintain secrecy of content) makes it even harder to control the spread of falsehoods and misinformation.
Himanshu Gupta and I, in a article just published in Columbia Journalism Review argue that despite being end to end encrypted, WhatsApp can read metadata related to its messages. This makes it possible to implement a content moderation system which uses Fact Checking to potentially weed out Fake Messages.