American law enforcement might have free rein to make you unlock a phone using your fingerprint, but personal passcodes? Nope. A Pennsylvania-based federal judge has ruled that the Securities and Exchange Commission can't make two former Capital One employees hand over the passcodes for their old work-supplied smartphones to prove that they're guilty of insider trading. While the US Constitution's Fifth Amendment doesn't protect people from self-incrimination using corporate records, both devices were locked with codes that only their owners knew. That's personal information still covered by constitutional protections, according to the court.