The latest documents related to Prism, the surveillance program of the U.S. government to internet users around the world, reveal that Microsoft had great participation in the leak of user information.

The new information collected and disseminated by Edward Snowden, a U.S. citizen who now seeks political asylum, were published on Thursday, 11, at the Guardian site.

Officially, Microsoft vehemently denies involvement in the program. According to the company, it only frees user data upon presentation of a warrant. The information released by Snowden, however, indicate otherwise.

According to the publication:

• the company helped the NSA (National Security Agency of the USA) to circumvent the encryption the chat in portal Outlook.com;

• the agency has access to e-mails sent by Outlook.com and Hotmail in the pre-encryption;

• Microsoft has worked with the FBI to allow NSA access SkyDrive, which stores files of 250 million users worldwide;

• the company cooperated with the FBI to explain potential problems with the new features Outlook.com that allows users to create an alias;

• Skype, bought the company in 2011 allowed the Prism listening to conversations on video and audio;

• the material collected by Prism was shared with the FBI and the CIA, through a program called the Prism in a document "team sport" ("team sport").

According to the Guardian, the agency has given particular emphasis to Skype, to have increasingly more access to the service, which already has 663 million users. According to the document, monitoring video Skype tripled since July 2012, with the addition of a new feature.

However, Skype has not gone to join the Prism only after being bought by Microsoft. He was part of the program eight months before the acquisition.

The U.S. government also denies that he had access to any information obtained without a warrant.