ZKP NFT

A Zero-Knowledge Proof (ZKP)-based NFT is a non-fungible token (NFT) that utilizes zero-knowledge proofs to verify users' eligibility without revealing their private data. Zero-knowledge proofs allow one party (the prover) to demonstrate knowledge of a value to another party (the verifier) without disclosing the actual information. This enhances security and privacy while ensuring access is restricted to verified individuals.

Features of ZKP NFT🖇️

• Privacy-Preserving: Users can verify eligibility without exposing personal data.

• Replay Attack Prevention: Each proof is used only once to prevent fraudulent reuse.

• Secure Minting: Only verified users can mint NFTs using valid cryptographic proofs.

• Identity-Based Access: Ensures NFTs are assigned to pre-verified individuals only.

• Efficient and Transparent: Uses smart contract logic to authenticate zero-knowledge proofs on-chain.

• Decentralized and Trustless: Eliminates the need for third-party verification.

Deployed Contract

• Network: EduChain

• Contract Address: 0x7E502AA4a3d10fE377f09efF7224ceC96Faf62db

How It Works

1. Proof Submission: Users generate and submit a zero-knowledge proof.

2. Validation: The contract verifies the proof against stored valid hashes.

3. Minting Process: If the proof is valid, an NFT is minted and assigned to the user.

4. One-Time Use: The proof is invalidated after use, preventing replay attacks.

5. Ownership Tracking: The contract maintains an ownership record of minted NFTs.

6. Balance Check: Users can check their NFT holdings using balance queries.

Usage

• Register a Proof: setValidProof(bytes32 proof) - Admin sets a valid proof.

• Mint an NFT: mint(bytes32 proof) - Users provide a valid proof to mint an NFT.

• Check Ownership: ownerOf(uint256 tokenId) - Retrieves the owner of a specific NFT.

• View Balance: balanceOf(address owner) - Displays the number of NFTs owned by an address.

Advantages of ZKP in NFTs

• Enhanced Security: Eliminates the risk of unauthorized access or forgery.

• User Anonymity: Users remain anonymous while proving eligibility.

• Reduced Fraud: Prevents reuse of proofs and unauthorized minting.

• Scalability: Can be integrated into large-scale identity verification systems.

Potential Use Cases

• Exclusive Memberships: Only verified members can access NFT-based communities.

• Digital Certificates: Securely issue and verify educational or professional credentials.

• Access Control: Restrict access to certain services based on NFT ownership.

• Gaming and Metaverse: Enable anonymous yet verified in-game asset ownership.

License

This project is open-source and available under the MIT License