The voice over IP client Skype never got off the radar of privacy activists. There were always rumors about backdoors in the voice communication software and that several organizations were able to record calls made by Skype users although Skype claimed otherwise.
Skype messages were in the focus of privacy groups since first news about text filtering messages in China became known to the public. Back then Skype released an official statement that the text filter applied by the Chinese Skype partner Tom Online would not affect security and encryption mechanisms of Skype, that people’s privacy would not be compromised and calls, chats and other forms of communication on Skype would continue to be encrypted and secure.
Researchers and privacy activists of the University of Toronto discovered files on unprotected Chinese computers that contained filtered Skype messages that were recorded in China.