Source: The New York Times
quote: Further, the encryption used by the Skype protocol is perhaps the most secure in the industry.
quote: Russian law enforcement agencies have the ability to eavesdrop on Skype conversations, as well as have access to Skype users geographic locations. In many cases, simple request for information is sufficient, and no court approval is needed. This ability was deliberately added by Microsoft after Skype purchase in 2011 for the law enforcement agencies around the world.