[jacquesm]

There is no obligation on the part of criminals to make it easy for law enforcement to catch them, and criminals will use whatever tools they can to stay out of jail. Yes, that's an arms race, but that arms race has nothing to do with whatsapp. That's just a general purpose tool that has been re-purposed. This is what I was getting at with my recent comment that knowledge (and by extension technology) is dual use. You can't make something that will not somehow benefit the bad guys too if it benefits the good guys.