Making Change for Anonymous Payers using DigiCash's Ecash

Ian Goldberg, ISAAC Group, UC Berkeley
Tuesday 29 Oct 1996, 4:15pm, Gates 104


DigiCash is a company which produces an electronic online payment system called ecash. This payment system uses blinded signatures to provide anonymity for the payer, but not, according to the company, the payee. In this talk, I will briefly outline the ecash protocol, and show how to use it to achieve payee anonymity or mutual anonymity. Some important applications of these methods will also be discussed, including how to make change for an anonymous payer without compromising his anonymity, and how to use ecash without even having a bank account.