Mathematical proof of vote validity without revealing voter identity or ballot choices
"zkSNARK lets voters prove their vote is valid without revealing who they are or how they voted. It's like showing your ID to prove you're old enough to vote, but without showing your name, address, or date of birth."
In traditional voting systems, you face an impossible choice:
Anyone can verify votes were counted correctly
No privacy - everyone knows how you voted
Opens door to coercion and retaliation
Complete privacy
No way to verify your vote was counted
Must trust election officials
We need both privacy AND verifiability. zkSNARK solves this.
zkSNARK = "Zero-Knowledge Succinct Non-Interactive Argument of Knowledge"
You: Show driver's license
Bouncer sees:
Result: Admitted, but bouncer knows everything about you
You: Present cryptographic proof
Bouncer sees:
Result: Admitted, bouncer knows ONLY that you're old enough
The bouncer is 100% confident you're old enough, but knows nothing else about you.
Complete privacy
Verifiable integrity
Auditable elections
Nothing useful
You log in with idNFT (biometric)
System verifies: You are eligible voter #47,892
zkSNARK generated: "Voter is registered"
You select: Candidate B
Your vote is encrypted: [unreadable encrypted blob]
zkSNARK generated: "Vote is for valid candidate"
System checks: Has voter #47,892 voted already?
Answer: No
zkSNARK generated: "This is voter's first vote"
Nullifier recorded: [cryptographic marker]
Encrypted vote stored in database
Commitment recorded on blockchain
zkSNARK generated: "Vote recorded correctly"
Receipt issued to you: [verification code]
Anyone can verify:
No one can see:
No. zkSNARK uses mathematical problems that are impossible to solve without the secret information (your vote). Even supercomputers can't fake proofs.
Technical Note: Based on elliptic curve cryptography (similar to Bitcoin). Breaking zkSNARK is as hard as breaking all cryptocurrency security.
Tiny! Each zkSNARK proof is only 256 bytes (smaller than a Tweet).
Comparison:
Voters never see the complexity!
Voter Experience:
Behind the scenes, zkSNARK proofs are generated automatically. Just like you don't need to understand HTTPS encryption to shop online safely.
No. Mathematically impossible.
Even if government demands:
Result: Privacy is guaranteed by mathematics, not promises.
Experience zkSNARK proofs in action:
Cast sample votes and watch proof generation
Check mathematical validity yourself
Attempt to fake a proof (you can't!)
See the full voting flow end-to-end