Dig on Castle LOCK: Castle is the nickname for the Whitehouse.
LOCK is the acronym for the security system developed and used for the DOD, DHS, Whitehouse, etc. The system is a hardware-based. The cryptography is streaming-based. (See links for further info.)
https:// cryptosmith.com/mls/lock/
https:// cryptosmith.com/2007/06/07/stream-ciphers/