VOTEAGAIN: A scalable coercion-resistant voting system
The strongest threat model for voting systems considers coercion resistance: protection against coercers that force voters to modify their votes, or to abstain. Existing remote voting systems either do not provide this property; require expensive operations for tallying; or burden users with the need to store cryptographic key material and with the responsibility to deceive their coercers. We propose VOTEAGAIN, a scalable voting scheme that relies on the revoting paradigm to provide coercion resistance. VOTEAGAIN uses a novel deterministic ballot padding mechanism to ensure that coercers cannot see whether a vote has been replaced. This mechanism ensures tallying takes quasilinear time, making VGITAGAIN the first revoting scheme that can handle elections with millions of voters. We prove that VOTEAGAIN provides ballot privacy, coercion resistance, and verifiability; and we demonstrate its scalability using a prototype implementation of its core cryptographic primitives.
WOS:000668146200088
2020-01-01
978-1-939133-17-5
Berkeley
1553
1570
REVIEWED
Event name | Event place | Event date |
ELECTR NETWORK | Aug 12-14, 2020 | |