Re: Why Digital Cash is Not Being Used

Date: Tue, 3 May 1994 11:48:18 -0800 From: tcmay@netcom.com (Timothy C. May)

- Digital Postage. This remains my favorite. There's a _need_ for untraceable payments (else why use a remailer?). I've written about this extensively, as have others.

I should point out that Pitney Bowes has a patent on using digital signatures and RSA to "sign" a postal meter application. The patent begins by noting that postal meters are literally machines that print money. It goes on to show how to control this with digital signatures. There is some kind of bar code applied to the stamp. My impression is that getting the info density on the envelope is a bit of a problem with the invention. But I'm not sure.