Marked_Money

[Perry E. Metzger]

Matthew J Ghio says:
> >         Is there a way of marking digital coins, so the depositor
> > can be identified?
> 
> Only if the depositor marks them as such.  The depositor generates the
> coin, and gives it to the bank to sign it.  The bank signs it in
> exchange for another valid signed token.  The bank can't alter it in any
> way, the bank can only sign it.

You have the protocol reversed. It is the person who withdraws the
money who blinds a coin. Depositors can indeed be tracked by collusion
between the person minting the coin and the bank, but in practice this
would not be a problem.

Perry