It's time for another Snowden-style leak to learn about all their new toys.
> The United States does not have a British-style Official Secrets Act; instead, several laws protect classified information, including the Espionage Act of 1917, the Atomic Energy Act of 1954 and the Intelligence Identities Protection Act of 1982.[1]
The ALCU has a bunch of work[2] on this if you want to dig deeper.
[1] https://en.wikipedia.org/wiki/Classified_information_in_the_...