Skype has come under scrutiny from the NSA and FBI since its PC-to-PC calls are encrypted using AES encryption. This is the same encryption used by the US Government for many things. So why is it ‘national security’ when the Government encrypts its communications yet it is assumed to be ‘criminal activity’ when private citizens do the same?
Just as a reminder, here is the Fourth Amendment to the United States Constitution:
The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.