Introduction
The National Security Agency (NSA) is the largest intelligence agency of USA that gathers information to detect any potential threat to USA. Recently in 2013, it created a lot of buzz when Edward Snowden, a former NSA contractor, revealed to the media about the clandestine surveillance programs of the NSA (NCPA 2014). According to the documents leaked by Snowden, the NSA spies on over a billion of people worldwide by intercepting their calls. Not only that, the NSA has access to the phone records of all the American citizens for the purpose of mass surveillance. It was also revealed that PRISM, the ...
