International Association for Cryptologic Research

Ph.D. Database

The aim of the IACR Ph.D. database is twofold. On the first hand, we want to offer an overview of Ph.D. already completed in the domain of cryptology. Where possible, this should also include a subject classification, an abstract, and access to the full text. On the second hand, it deals with Ph.D. subjects currently under investigation. This way, we provide a timely map of contemporary research in cryptology. All entries or changes need to be approved by an editor. You can contact them via phds (at)


Ben Adida (#229)
Name Ben Adida
Personal Homepage
Topic of his/her doctorate. Advances in Cryptographic Voting Systems
Category cryptographic protocols
Keywords voting
Ph.D. Supervisor(s) Ronald Linn Rivest
Year of completion 2006

Democracy depends on the proper administration of popular elections. Voters should receive assurance that their intent was correctly captured and that all eligible votes were correctly tallied. The election system as a whole should ensure that voter coercion is unlikely, even when voters are willing to be influenced. These conflicting requirements present a significant challenge: how can voters receive enough assurance to trust the election result, but not so much that they can prove to a potential coercer how they voted?

This dissertation explores cryptographic techniques for implementing verifiable, secret- ballot elections. We present the power of cryptographic voting, in particular its ability to successfully achieve both verifiability and ballot secrecy, a combination that cannot be achieved by other means. We review a large portion of the literature on cryptographic voting. We propose three novel technical ideas:

1. a simple and inexpensive paper-base cryptographic voting system with some interesting advantages over existing techniques,

2. a theoretical model of incoercibility for human voters with their inherent limited computational ability, and a new ballot casting system that fits the new definition, and

3. a new theoretical construct for shuffling encrypted votes in full view of public observers.

E-Mail Address ben (at)
Last Change 2011-02-15 11:04:18
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