The computer giant Apple is defying a court order to allow investigators access to an encrypted smartphone used by a gunman in the massacre of 14 people in California. Apple argues that, far from protecting a terrorist, it is upholding a principle which millions of iPhone owners value - their right to privacy and especially invasive snooping by the state.
The company's chief executive, Tim Cook, stated forcefully that it would fight the court because it was being asked to create a skeleton key that would be prized by criminal hackers and totalitarian regimes.
The FBI, which wants the contents of the phone, argues that criminals should not be protected by technology. The agency is determined to learn whether the San Bernadino phone user was in contact with Islamic State operatives, and whether the lives of other innocent Americans could be in jeopardy.
The judge in the case upheld the US Justice Department's application to disable the phone's ironclad security. Somewhat quaintly, given that the case involves cutting edge technology, an 18th century law came into play in the court's judgment. Government lawyers relied on the All Writs Act, a law that says courts can require that people do things to comply with their orders.