Hybrid Voting Protocols and Hardness of Manipulation

This paper addresses the problem of constructing voting protocols that are hard to manipulate. We describe a general technique for obtaining a new protocol by combining two or more base protocols, and study the resulting class of (vote-once) hybrid voting protocols, which also includes most previously known manipulationresistant protocols. We show that for many choices of underlying base protocols, including some that are easily manipulable, their hybrids are NP-hard to manipulate, and demonstrate that this method can be used to produce manipulation-resistant protocols with unique combinations of useful features.

• Type: Conference
• Year: 2005
• Where: ISAAC
• Authors: Edith Elkind, Helger Lipmaa
• Keywords: Base Protocols, Hybrid Voting Protocols, ISAAC 2005, Manipulationresistant Protocols