1. Secret Voting What makes a secret vote secret?

2. Voting Goals Need to record who voted only eligible voters can vote, nobody votes twice Need to record the votes to determine a “winner” but May NOT know who voted what the essence of a secrete vote

3. Step 1: Submit your Ballot Signature on envelope certifies who you are Your name can be checked against list of eligible voters

4. Step 2: Separate Envelope

5. Step 3: Tabulate Results Voter List: Bert Wachsmuth Joe Student Jane Faculty Contains list of who voted Votes List: George Bush: 2 votes Al Gore: 3 votes Contains a list or summary of anonymous votes

6. Cheating Prevent eligible voters from voting Vote without being eligible Vote more than once Invalidate valid votes or validate invalid votes Learn who voted what: (active) observe during voting process (passive) maintain relationship between voters and votes: do not separate voter name from vote keep voter list and votes list in same order