On September 25, 2024 NSA released under FOIA to me 49 declassified documents on cryptography policies, machines and programs dated from 1970s to 2000s, 3 formerly Secret, a few Confidential, most FOUO, some heavily redacted. The release available as a 7Zip file (50MB): https://cryptome.org/2024/12/NSA-JY.7z