National Institute of Standards and Technology Special Publication 800-53 (Rev 4) was
released in April 2013. This publication has been developed by NIST to further its statutory
responsibilities under the Federal Information Security Management Act (FISMA),
Public Law (P.L.) 107-347. NIST is responsible for developing information security standards
and guidelines, including minimum requirements for federal information systems, but such
standards and guidelines shall not apply to national security systems without the express
approval of appropriate federal officials exercising policy authority over such systems.
The services below have undergone an independent third party assessment that confirmed
the services are operating in compliance with NIST 800-53 controls. The attestation letter
can be found here.