Well, couldn't _only_ the voting machine record the time the token was used as long as the token is random? (They could just generate N tokens -- one for each registered voter -- and pull one from the pool each time.)
If they recorded the time you took your token and the time the token was used then they'd have a small enough pool of people to work with. I know in my state if a precinct has a small enough pool of registered voters it doesn't show the vote totals from the precinct because of privacy issues.
If they recorded the time you took your token and the time the token was used then they'd have a small enough pool of people to work with. I know in my state if a precinct has a small enough pool of registered voters it doesn't show the vote totals from the precinct because of privacy issues.