NEW YORK (NYTIMES) - Apple unveiled a plan early this month based on good intentions: Root out images of child sexual abuse from iPhones.

But as is often the case when changes are made to digital privacy and security, technology experts quickly identified the downside: Apple's approach to scanning people's private photos could give law enforcement authorities and governments a new way to surveil citizens and persecute dissidents. Once one chip in privacy armour is identified, anyone can attack it, they argued.