Kazue Sako

1
Kazue Sako

• Background
• Network based voting protocols
• homomorphic encryption based(Crypto94)
• receipt-free voting(Eurocrypt95, 00)
• efficient proofs for mix-net(Crypto01)
• hybrid mix-net for long messages(FC07)
• Implementations of Voting System
• running for Labor Union based on mix-net since
  2004 (20,000voters, nearly bi-monthly)
• prototype for voting from mobile phones
• This years challenge
• Operation of electronic voting system in academic
  symposiums involving general participants (SVIS)
• This Seminar (20 min.)
• Overview of SVIS project
• A new privacy requirement in voting protocol and
  ideas to achieve it
• Open questions
• How can we provide security equivalency between
  non-perfect paper-based voting that people enjoy
  today and similarly non-perfect electronic voting
  systems but with more desirable features.
• We are apt to refrain from using electronic
  voting systems due to non-perfectness, but we
  should be using them and collecting more of
  experiences and lessons!