Engineering an eCash System

Since the seminal eCash paper by Chaum, Fiat and Naor [4], there have been many improvements to the original protocol. However, a protocol constitutes only a single layer of a production system. We examine the feasibility of using some of these new eCash protocols in a more massive system that replaces our current physical cash system. Our examples are taken from the Australian economy, but should be applicable to other developed nations.