How can we check that the letter and the page were actually signed by these companies? What if it's all fake? Update: http://www.microsoft.com/en-us/news/pres

How can we check that the letter and the page were actually signed by these companies? What if it's all fake? Update: http://www.microsoft.com/en-us/news/press/2013/dec13/12-08companycoalitionpr.aspx http://www.microsoft.com/en-us/news/press/2013/dec13/12-08co... http://www.nytimes.com/2013/12/09/technology/tech-giants-issue-call-for-limits-on-government-surveillance-of-users.html?_r=0 http://www.nytimes.com/2013/12/09/technology/tech-giants-iss... http://www.theguardian.com/world/2013/dec/09/nsa-surveillance-tech-companies-demand-sweeping-changes-to-us-laws http://www.theguardian.com/world/2013/dec/09/nsa-surveillanc...