Foreign Intelligence Surveillance Act
Globally, FISA and NSL demands have increased by 15 percent during the first six months of 2014 and by 150 percent over the five-year reporting period.
Google, Twitter, Microsoft and Facebook are among eight of the world's largest tech companies to sign a joint letter to US congress demanding reforms in the way government agencies collect user data. Their demands align with the USA Freedom Act.
Data released by Google shows that requests rose from 21,389 to 25,879 between the second half of 2012 and the first half of 2013. In total 42,500 user accounts were targeted and Google said 65 percent of requests led to some data being given up.