How To Make A Mint: The Cryptography of Anonymous Electronic Cash

Laurie Law, Susan Sabett, Jerry Solinas
National Security Agency Office of Information Security Research and Technology
Cryptology Division
18 June 1996
https://groups.csail.mit.edu/mac/classes/6.805/articles/money/nsamint/nsamint.htm

Internet Archive: https://archive.org/details/HowToMakeAMintCryptographyElectronicCash

PDF: https://ia800106.us.archive.org/25/items/HowToMakeAMintCryptographyElectronicCash/HowToMakeAMint_CryptographyElectronicCash.pdf