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Re: Anonymous Digicash
Mike Ingle <[email protected]> writes:
> I want to write a simple digicash program. This will use code from PGP
> as much as possible. It will probably be online digicash, but it needs
> strong anonymity. For that you need a blind signature protocol. What is
> the best one, and where can I get a description of it?
>
> What is the best/simplest digicash system to implement?
>
> Is it possible to have a partially blind signature? For example, the
> customer generates the cash (random string), blinds it, and sends it
> to the bank. The bank adds an expiration date and signs it. The customer
> unblinds the random string, leaving a signature on both the cash and
> the expiration date.
>
> --- [email protected]
Allowing the bank to choose a timestamp opens the door for a
subliminal channel.