OAKSTAR is a secret internet surveillance program of the National Security Agency (NSA) of the United States.
It was disclosed in 2013 as part of the leaks by former NSA contractor Edward Snowden.
OAKSTAR is an umbrella program involving surveillance of telecommunications.
It falls under the category of "Upstream collection", meaning that data is pulled directly from fiber-optic cables and top-level communications infrastructure.
to operate under the legal authority of Section 702 of the FISA Amendments Act (FAA)