How can you achieve vote secrecy with this system? Not being able to prove you voted for X, even if you wanted to, is one of the most important parts of electoral democracies.
There are several methods that allow this. I disagree with all of them, since I believe transparency is more important than anything else in an electoral process, and even the simplest is beyond comprehension of about 1/4 of voters, and beyond the effort to comprehend of about 3/4.
Alongside secrecy, I wonder how you prevent people from selling their votes in this system. It could be a much bigger problem than it currently is because of the ease with which someone could do it.
