U.S. District Court rules that your phone's passcode is protected by the fifth amendment
The case in Pennsylvania revolves around two Capital One analysts accused of insider trading. The government believed that the evidence of this crime was hidden inside the defendants' phones, and requested that they turn over the passcodes so that the handsets could be unlocked. The employees refused, and the matter became a separate legal issue.
Judge Mark Kearney of Pennsylvania said, "We find, as the SEC is not seeking business records but Defendants' personal thought processes, Defendants may properly invoke their Fifth Amendment right." The two analysts turned $150,000 into $2.8 million using information that they had acquired from their jobs with the bank.
Ironically, constitutional scholar Orin Kerr, said that having the defendants punch in the passcode themselves on their own phones, would eliminate the fifth amendment issue since the actual passcode would not have to be entered into evidence.
source: arstechnica (1), (2) via Phonescoop