Independent:

In a huge room somewhere near Apple’s glistening new campus, highly advanced machines are heating, cooling, pushing, shocking and otherwise abusing chips. Those chips – the silicon that will power the iPhones and other Apple products of the future – are being put through the most gruelling and intense work of their young and secretive lives. Throughout the room are hundreds of circuit boards, into which those chips are wired – those hundreds of boards are placed in hundreds of boxes, where these trying processes take place.

Those chips are here to see whether they can withstand whatever assault anyone might try on them when they make their way out into the world. If they succeed here, then they should succeed anywhere; that’s important, because if they fail out in the world then so would Apple. These chips are the great line of defence in a battle that Apple never stops fighting as it tries to keep users’ data private.

Fascinating look behind one of Apple’s curtains.