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Secure Electronic Voting with Cryptography
Abstract
In recent years, computer and network-based voting technologies have been gradually adopted for various elections. However, due to the fragile nature of electronic ballots and voting software, computer voting has posed serious security challenges. This chapter studies the security of computer voting and focuses on a cryptographic solution based on mix-nets. Like traditional voting systems, mix-net-based computer voting provides voter privacy and prevents vote selling/buying and vote coercion. Unlike traditional voting systems, mix-net-based computer voting has several additional advantages: 1) it offers vote verifiability, allowing individual voters to directly verify whether their votes have been counted and counted correctly; 2) it allows voters to check the behavior of potentially malicious computer voting machines and thus does not require voters to blindly trust computer voting machines. In this chapter, we give the full details of the building blocks for the mix-net-based computer voting scheme, including semantically secure encryption, threshold decryption, mix-net, and robust mix-net. Future research directions on secure electronic voting are also discussed.
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