FWIW, NSA has a history Paper from 1996 HOW TO MAKE A MINT: THE CRYPTOGRAPHY OF ANONYMOUS ELECTRONIC CASH https://groups.csail.mit.edu/mac/classes/6.805/arti

FWIW, NSA has a history Paper from 1996 HOW TO MAKE A MINT: THE CRYPTOGRAPHY OF ANONYMOUS ELECTRONIC CASH https://groups.csail.mit.edu/mac/classes/6.805/articles/money/nsamint/nsamint.htm https://groups.csail.mit.edu/mac/classes/6.805/articles/mone...