Chinese, Russian and United States 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 they purchased Skype in 2011 for the law enforcement agencies around the world. This is implemented through switching the Skype client for a particular user account from the client-side encryption to the server-side encryption, allowing dissemination of an unencrypted data stream.