Backdoor

Up to this point, we have done everything that is both within our power and within the law to help them.  But now the U.S. government has asked us for something we simply do not have, and something we consider too dangerous to create.  They have asked us to build a backdoor to the iPhone.

-- Apple CEO Tim Cook in an open letter to customers announcing his company’s decision to fight a court order to compel Apple to assist the investigation in unlocking the phone of San Bernardino shooter Syed Rizwan Farook,  16 February 2016