Sheri Pym, the federal judge, has ordered Apple not to turn off its encryption but to make it easier for federal agents to randomly guess the suspects’ iPhone passcode. Apple has built a security feature into iPhones so that a phone slows down anyone trying to “brute force” his way into a phone by guessing passcode after passcode.

Source : Apple ordered to decrypt iPhone of San Bernardino shooter for FBI | US news | The Guardian