Notes
1 “Learning from the Enemy: The GUNMAN Project,” National Security Agency, 2009, https://www.nsa.gov/Portals/70/documents/about/cryptologic-heritage/historical-figures-publications/publications/coldwar/LearningfromtheEnemyGUNMAN.pdfhttps://www.nsa.gov/Portals/70/documents/news-features/declassified-documents/cryptologic-histories/Learning_from_the_Enemy.pdf