Earlier this year, Google declined to unlock an Android phone after the Federal Bureau of Investigation served the company with a search warrant.
Many other technology companies will have to figure out how they plan to deal with such search warrants and demands to crack into smartphones, according to the Wall Street Journal.
Our laws haven't caught up to technology, so the legal battle is far from over. While the U.S. Supreme Court upheld the "Third Party Doctrine" -- where agents can use information stored through third parties without a search warrant -- a password is a much trickier proposition. A password would mean that law enforcement would have access to one's address books, email, photos and other personal information.