Verifiability is not inherently tied to PB.
Basically, since voting and elections are high-stakes issues, they are targeted by hackers.
There seem to be several measures to counteract that:
1) encryption and other techniques to preserve anonymity
2) voter verification
The process of voter verification means that you can use your voter ID after the election to check your vote.
That means that it is possible to verify that one's vote has been correctly recorded.
You know: because Russians.
Not to mention whatever other electronic equivalent of "hanging chads" might exist.
Here is an example of a voting system that has implemented that:
heliosvoting.org
So, is there any way for a user to check, based on a unique key that was emailed to them (to preserve their anonymity), to verify their vote after it has been recorded?
Thanks for any insight,
-alec