๐ฎโโ๏ธ NSA Publishes Report on Anonymous Electronic Cash
On June 18, 1996, the NSA published the report "How to Make a Mint: The Cryptography of Anonymous Electronic Cash." The report only became public on October 31.
This report reviews the scientific literature on cryptographic methods for implementing secure electronic cash systems.
How To Make A Mint: The Cryptography of Anonymous Electronic Cash