Statement Voting & Liquid Democracy Hong-sheng Zhou Virginia - - PowerPoint PPT Presentation

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statement voting

Statement Voting & Liquid Democracy Hong-sheng Zhou Virginia - - PowerPoint PPT Presentation

Jul 10, 2023 263 likes •426 views

Statement Voting & Liquid Democracy Hong-sheng Zhou Virginia Commonwealth University Joint with Bingsheng Zhang (Lancaster University) e-voting E-voting encompasses a broad range of voting systems that apply electronic

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Statement Voting  

&

Liquid Democracy 

Hong-sheng Zhou

Virginia Commonwealth University

Joint with

Bingsheng Zhang (Lancaster University)

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e-voting

E-voting encompasses a broad range of voting systems that

apply electronic elements in one or more steps of the electoral process.

Two main categories:
On-site e-voting systems
Remote e-voting systems

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Voters Trustees

conventional voting — roles

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Voters Trustees

conventional voting — roles

BB

Bulletin Board (broadcast)

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BB

Voters Trustees vote for candidate #1 vote for candidate #2

conventional voting

tally: process the voting ballots e.g.Helios   practical

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Voters P1 votes for candidate #1 P2 follows P1

statement voting: a new concept

P3 follows P1 if P1 votes; otherwise votes for candidate #2 vote for candidate #1 vote for candidate #2 Voters

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BB

Voters Trustees P1 votes for candidate #1 P2 follows P1

statement voting — without privacy

P3 follows P1 if P1 votes; otherwise votes for candidate #2 tally circuit: process the voting statements

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BB

Voters Trustees P1 votes for candidate #1 P2 follows P1

statement voting — with privacy

P3 follows P1 if P1 votes; otherwise votes for candidate #2 tally circuit: process the voting statements Threshold Fully Homomorphic Encryption

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BB

Voters Trustees P1 votes for candidate #1 P2 follows P1

statement voting — with privacy

P3 follows P1 if P1 votes; otherwise votes for candidate #2 tally circuit: process the voting statements Threshold Fully Homomorphic Encryption Zero-Knowledge Proof

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BB

Voters Trustees P1 votes for candidate #1 P2 follows P1

statement voting — with privacy

P3 follows P1 if P1 votes; otherwise votes for candidate #2 tally circuit: process the voting statements Threshold Fully Homomorphic Encryption Zero-Knowledge Proof Helios+  not practical

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BB

Voters Trustees P1 votes for candidate #1 P2 follows P1

statement voting — with privacy

P3 follows P1 if P1 votes; otherwise votes for candidate #2 tally circuit: process the voting statements Threshold Encryption efficient Zero-Knowledge Proof full version  practical Mix-net

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the full scheme

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Voters Trustees P1 votes for candidate #1 P2 follows P1

voting functionality

P3 follows P1 if P1 votes; otherwise votes for candidate #2 tally circuit: process the voting statements full version  modeling

support voting statements

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application: liquid democracy

Liquid democracy (a.k.a. delegative democracy) [Ford 2002] is

a hybrid of direct democracy and representative democracy, where the voters can either vote directly on issues, or they can delegate their votes to representatives who vote on their behalf.

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Voters P1 votes for candidate #1 P2 follows P1

statement voting: a new concept

P3 follows P1 if P1 votes; otherwise votes for candidate #2 vote for candidate #1 vote for candidate #2 Voters

Take home message

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Reference: Bingsheng Zhang and Hong-sheng Zhou. Brief Announcement: Statement Voting and Liquid Democracy. PODC 2017  Long version at https://eprint.iacr.org/2017/616