Brief Announcement

Abstract

The existing (election) voting systems, e.g., representative democracy, have many limitations and often fail to serve best interest of people in collective decision making. To address this issue, concept of liquid democracy has been emerging as an alternative decision-making model to make better use of the wisdom of crowds. Very recently, a few liquid democracy implementations, e.g. Google Votes and Decentralized Autonomous Organization (DAO), are released; however, those systems only focus on functionality aspect, as no privacy/anonymity is considered. In this work, we, for first time, provide a rigorous study of liquid democracy under Universal Composability (UC) frame- work. In literature, liquid democracy was achieved via two separate stages -- delegation and voting. We propose an efficient liquid democracy e-voting scheme that uni es these two stages. At core of our design is a new voting concept called statement voting, which can be viewed as a natural extension of conventional voting approaches. We remark that our statement voting can be extended to enable more complex voting and generic ledger-based non-interactive multi-party computation. We believe that statement voting concept opens a door for constructing a new class of e-voting schemes.