As Apple rolled out an advertising campaign last month touting the impenetrability of the iPhone — “Privacy. That’s iPhone”, the commercials promised — a secretive Israeli company called in its sales people to talk about an important update designed to thwart that very privacy.

According to one person at the meeting, the executives from NSO Group made a bold claim: using just one simple missed call on  WhatsApp, it had figured out a way to “drop its payload”, a piece of software called Pegasus that can penetrate the darkest secrets of any iPhone.

Within minutes of the missed call, the phone starts revealing its encrypted content, mirrored on a computer screen halfway across the world. It then transmits back the most intimate details such as private messages and location, and even turns on the camera and microphone to live-stream meetings.