A look at WhatsApp's approach to detecting child porn, as police worry that wider use of end-to-end encryption online will make it harder to catch predators (Matt Burgess/Wired UK)

Matt Burgess / Wired UK:
A look at WhatsApp's approach to detecting child porn, as police worry that wider use of end-to-end encryption online will make it harder to catch predators  —  A trail of clues helped police close in on a dangerous predator.  Now, a battle over the future of end-to-end encryption could change the rules of engagement