You likely know that Apple's iMessage is encrypted well enough that law enforcement can't snoop on your messages, but it's now very clear that this security is setting up a conflict with the US government. The New York Times understands that Apple refused at least one Department of Justice request for iMessage chats between suspects using iPhones. There's no way to comply, according to the response. Reportedly, the case ruffled enough feathers that officials at the FBI and Justice Department were pushing for legal action against Apple. That never materialized, but there's no doubt that the Cupertino crew is on notice.