STU-I explained

The STU-I, like its successors sometimes known as a "stew phone", was a secure telephone developed by the U.S. National Security Agency for use by senior U.S. government officials in the 1970s.[1]

See also

External links

Notes and References

  1. Web site: STU-I Secure Phone . 2022-09-17 . www.cryptomuseum.com.