backing ecash

[Jonathan Rochkind]

At 10:47 PM 12/06/94, Paul Ste. Marie wrote:
>Isn't there a problem with net-based distribution of ecash?  It would
>seem that Eve could intercept the ecash and spend it first.  Encrypted
>email return of the ecash would seem to violate the anonymity of the
>ecash.  Some sort of one-time encrypted return address would seem to
>be necessary, but better yet would be a vending machine that took a
>floppy disk and some currency and stuck the ecash on the floppy.


Diffie-Hellman would seem appropriate here. Look it up in Schneier.

Vending machines seem a good idea too, but one unlikely to develop any time
soon. Or possibly ever, if the net becomes so prevalent that no one would
think of doing anything offline that could just as well be done online.