1. Overview
ZKAnon is a zero-knowledge proof protocol for anonymous human verification. It enables users to prove that they are unique, real humans without revealing any personally identifiable information.
ZKAnon provides an SDK and on-chain verifier contracts that can be integrated by DAOs, DeFi protocols, and Web3 applications to enable Sybil-resistant identity validation with complete privacy.
2. Motivation
In Web3 ecosystems, identity verification typically sacrifices privacy:
Centralized KYC
Reveals personal data to intermediaries
Wallet Pseudonyms
Vulnerable to Sybil attacks
Decentralized Systems
Lack scalable proof of humanity
ZKAnon Solution
- Proves "human uniqueness" without identity disclosure
- Uses cryptographic nullifiers to prevent multiple registrations
- Enables anonymous participation in DAOs, airdrops, and DeFi
3. Architecture Overview
3.1 System Components
| Component | Description |
|---|---|
| User Verifier | Off-chain component that performs initial verification (KYC, biometric, or social proof) |
| ZK Prover | Generates zk-SNARK proof from verifier data. The proof contains no personal information |
| On-chain Verifier | Validates proofs on-chain and stores nullifier hashes to ensure uniqueness |
| Nullifier Registry | Maintains one-way hashed identifiers preventing duplicate registrations |
| dApp Integrator SDK | Provides developers with tools to request, verify, and integrate ZK proofs |
3.2 Flow Diagram
4. Zero-Knowledge Layer
4.1 Proof Generation
ZKAnon utilizes zk-SNARKs built with Circom and SnarkJS. Each verification circuit ensures that:
- •The user has passed a trusted verification (off-chain)
- •No personal data is revealed during proof generation
- •Each proof contains a unique nullifier for "one proof per human" enforcement
Example circuit pseudo-code:
template HumanProof() {
signal input user_secret;
signal input verifier_public_key;
signal output nullifier;
component hash = Poseidon(2);
hash.inputs[0] <== user_secret;
hash.inputs[1] <== verifier_public_key;
nullifier <== hash.output;
}4.2 On-Chain Verification
The on-chain verifier uses Groth16 or Plonk verification mechanisms for low-cost gas validation.
function verifyProof(
bytes memory proof,
uint256[2] memory input
) public returns (bool) {
require(!nullifiers[input[0]], "Duplicate proof");
bool verified = verifier.verify(proof, input);
if (verified) {
nullifiers[input[0]] = true;
}
return verified;
}5. Integration SDK
5.1 Developer Setup
Developers can integrate ZKAnon via the SDK or REST API.
Installation
npm install @zkanon/sdkInitialization
import { ZKAnon } from "@zkanon/sdk";
const client = new ZKAnon({
network: "solana", // or "ethereum", "base"
verifierAddress: "0x1234...abcd"
});Verify Proof
const result = await client.verify({
proof: zkProof,
nullifier: userNullifier
});
if (result.valid) {
console.log("Human verified:", result.address);
}6. On-chain Contracts
| Contract | Description |
|---|---|
| ZKVerifier.sol | Core verification contract using zk-SNARK verification key |
| NullifierRegistry.sol | Ensures each proof is unique and prevents duplicate submissions |
| ZKAccess.sol | Optional access control module for DAOs or protocols |
Network Deployments
Solana
SPL-compatible verifier
TBDEthereum
EVM-compatible verifier
TBDPolygon
Layer 2 verifier instance
TBD7. Privacy Design
ZKAnon follows the Privacy-by-Design principle:
No Personal Data On-Chain
All identity information stays off-chain
Zero Data Transmission
Off-chain verifiers never transmit raw identity data
Deterministic Proofs
Proof generation is deterministic and non-reversible
Unlinkable Nullifiers
Nullifiers are hashed and salted for unlinkability
Data Flow Privacy Layer
User Identity → [Off-chain Verifier] → zk-Proof (anonymous)
↓
ZKAnon Contract → Proof Validity Only8. Security Considerations
Sybil Resistance
Enforced via nullifier uniqueness
Replay Protection
Proofs are valid once; reused proofs are rejected
Circuit Integrity
Circom circuits are open-source and audited
Cross-chain Security
Uses verifiable bridges for proof validation across chains
Data Breach Prevention
No identity data leaves the verifier environment
9. Token Utility (ZKAN)
The native token $ZKAN supports network governance and incentivization.
| Utility | Description |
|---|---|
| Staking | Node operators stake $ZKAN to validate proofs and earn rewards |
| Gas Fees | Proof submissions and validations use $ZKAN for transaction costs |
| Governance | Token holders vote on verifier updates, circuit versions, and grants |
| Rewards | dApp integrations and developers earn token-based rewards |
10. Future Roadmap
MVP Launch
Core zk-proof + verifier contracts
SDK Beta
Developer tools and integration examples
DAO Activation
Governance and staking model
zk-Airdrop Framework
Anonymous reward distribution system
Multi-chain Expansion
Support for Solana, Base, Linea, and zkSync
Ready to Integrate ZKAnon?
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