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PrivateVoting
AdvancedQuantum-resistant voting system with zero-knowledge proofs and complete ballot privacy
Overview
PrivateVoting is a sophisticated voting contract that combines quantum-resistant cryptography with zero-knowledge proofs to enable truly private, verifiable voting. Voters can cast ballots without revealing their choices, while still allowing anyone to verify the integrity of the election.
Key Features
- Complete ballot privacy
- Zero-knowledge proofs
- Quantum-resistant security
- Verifiable results
Use Cases
- • DAO governance voting
- • Corporate board elections
- • Community polls
- • Token holder voting
Privacy Features
Zero-Knowledge Proofs
Voters submit encrypted ballots along with zero-knowledge proofs that demonstrate they voted for a valid option, without revealing which option they chose. This ensures ballot privacy while maintaining verifiability.
function castVote(bytes32 encryptedVote, bytes memory zkProof) public {
require(verifyZKProof(encryptedVote, zkProof), "Invalid proof");
ballots[msg.sender] = encryptedVote;
emit VoteCast(msg.sender, block.timestamp);
}Homomorphic Tallying
Votes are tallied using homomorphic encryption, allowing the final results to be computed without decrypting individual ballots. This ensures that individual votes remain private even after the election concludes.
Quantum Resistance
All cryptographic operations use post-quantum algorithms, ensuring that votes remain private even against future quantum computer attacks. Uses lattice-based encryption for long-term security.
Voting Process
Create Proposal
The election administrator creates a new voting proposal with options and eligibility criteria.
Voter Registration
Eligible voters register and receive cryptographic credentials for private voting.
Cast Ballots
Voters submit encrypted ballots with zero-knowledge proofs during the voting period.
Tally Results
After voting closes, results are computed using homomorphic tallying without decrypting ballots.
Verify Results
Anyone can verify the integrity of the election using cryptographic proofs.
Deployment
Deploy with Configuration
# Deploy PrivateVoting contract
qp-cli deploy PrivateVoting.sol --constructor-args [
"Board Election 2024",
["Alice", "Bob", "Carol"],
1735689600, # voting start timestamp
1735776000 # voting end timestamp
]
# Deploy to mainnet with verification
qp-cli deploy PrivateVoting.sol --network mainnet --verifyContract Interaction
Register as Voter
// Register for voting (if eligible)
await voting.register();
// Check registration status
const isRegistered = await voting.isRegistered(voterAddress);
console.log("Registered:", isRegistered);Cast Vote
// Generate encrypted vote with zero-knowledge proof
const { encryptedVote, zkProof } = await generatePrivateVote(optionIndex);
// Submit vote
await voting.castVote(encryptedVote, zkProof);
// Verify vote was recorded
const hasVoted = await voting.hasVoted(voter.address);
console.log("Vote cast successfully:", hasVoted);Tally Results
// After voting period ends, tally results (owner only)
await voting.tallyVotes();
// Get results
const results = await voting.getResults();
results.forEach((count, index) => {
console.log(`Option ${index}: ${count} votes`);
});
// Get winning option
const winner = await voting.getWinner();
console.log("Winner:", winner);Verify Election
// Verify election integrity
const proof = await voting.getVerificationProof();
const isValid = await voting.verifyElection(proof);
console.log("Election integrity verified:", isValid);
// Get voting statistics
const stats = await voting.getStatistics();
console.log("Total registered:", stats.totalRegistered);
console.log("Total voted:", stats.totalVoted);
console.log("Turnout:", (stats.totalVoted / stats.totalRegistered * 100).toFixed(2) + "%");Explore More Advanced Contracts
Check out other advanced examples demonstrating privacy and security features
The enterprise-grade blockchain protocol for the post-quantum era. Built for institutions and people who demand safety, privacy, and compliance in the quantum era.
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support@quantumprivate.org
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