In addition, Apple has enhanced the security of its devices and even supports the new version of its operating system, iOS 8, impossible decrypting user data by law enforcement authorities, even if they have a search warrant.
However, an NSA document dating back to 2010 has recently become public reveals that the British GCHQ was monitoring iPhone users through their unique UDIDs. Apple has abandoned the UDID system 2013.
Documents that Snowden has uncovered so far do not contain reports of hidden spyware on iPhone, but there is still a lot of material that is believed to have not been published so far.
Snowden remains in the US for a series of charges such as spying and stealing government papers. From 2013 he lives with his girlfriend in Moscow who gave him asylum and a three-year residence permit.
Editing: Vangelis Pratikakis