ZIP-5: Post-Quantum Security for DeFi & NFTs

Abstract

This proposal mandates Post-Quantum Cryptography for all Zoo ecosystem components, including DeFi protocols, NFT marketplace, and gaming infrastructure. Building on Lux Network's PQC implementation (LP-100) and Hanzo's AI security (HIP-5), this ensures quantum-resistant protection for user assets and transactions.

Motivation

The Zoo ecosystem manages significant value through:

DeFi Protocols: Billions in TVL requiring long-term security
NFT Assets: Unique digital assets with perpetual value
Gaming Assets: In-game items and currencies
User Wallets: Private keys needing quantum resistance
Smart Contracts: Immutable code requiring future-proof signatures

Quantum computers threaten all current cryptographic protections. Zoo must implement PQC before quantum threats materialize.

Specification

PQC Integration Stack

Zoo Application Layer
├── Smart Contracts (PQC signatures)
├── NFT Metadata (PQC encryption)
├── Game Assets (PQC protected)
└── User Wallets (PQC keys)
    ↓
Lux Network (LP-100)
├── ML-KEM-768 (Key encapsulation)
├── ML-DSA-65 (Digital signatures)
└── Hybrid Mode (Defense-in-depth)

Smart Contract Security

PQC-Enhanced Contracts

contract PQCSecureVault {
    // Quantum-resistant signature verification
    mapping(address => bytes) public mlDsaPublicKeys;
    
    modifier requiresPQCSignature(
        bytes memory signature,
        bytes32 messageHash
    ) {
        require(
            verifyMLDSA(msg.sender, messageHash, signature),
            "Invalid PQC signature"
        );
        _;
    }
    
    function deposit(
        uint256 amount,
        bytes memory pqcSignature
    ) external requiresPQCSignature(
        pqcSignature,
        keccak256(abi.encode(amount, nonce[msg.sender]))
    ) {
        // Deposit logic
    }
}

NFT Protection

Quantum-Safe NFT Standard (ZRC-721-PQC)

{
  "name": "Quantum Resistant NFT",
  "description": "NFT with PQC protection",
  "image": "ipfs://...",
  "pqc_metadata": {
    "encrypted_attributes": "ML-KEM encrypted data",
    "creator_signature": {
      "algorithm": "ML-DSA-65",
      "public_key": "0x...",
      "signature": "0x..."
    },
    "provenance_chain": [
      {
        "owner": "0x...",
        "timestamp": 1703001234,
        "pqc_signature": "0x..."
      }
    ]
  }
}

DeFi Protocol Updates

Yield Vault with PQC

interface IPQCYieldVault {
    // Deposit with quantum-resistant authorization
    function depositWithPQC(
        uint256 amount,
        bytes calldata mlKemPublicKey,
        bytes calldata mlDsaSignature
    ) external;
    
    // Withdraw with PQC verification
    function withdrawWithPQC(
        uint256 shares,
        bytes calldata pqcProof
    ) external;
    
    // Emergency withdrawal with multi-sig PQC
    function emergencyWithdraw(
        bytes[] calldata pqcSignatures
    ) external;
}

Wallet Integration

Quantum-Safe Wallet Structure

interface PQCWallet {
  // Classical keys (for compatibility)
  classicalAddress: string;
  classicalPrivateKey: string;
  
  // PQC keys
  mlKemKeyPair: {
    public: Uint8Array;
    secret: Uint8Array;
  };
  
  mlDsaKeyPair: {
    public: Uint8Array;
    secret: Uint8Array;
  };
  
  // Hybrid mode enabled
  hybridMode: boolean;
}

Gaming Asset Security

Secure Game Items

class PQCGameItem {
  id: string;
  owner: string;
  attributes: EncryptedData;  // ML-KEM encrypted
  signature: MLDSASignature;   // Authenticity proof
  
  transfer(newOwner: string, pqcAuth: PQCAuthorization) {
    // Verify PQC authorization
    if (!verifyPQC(pqcAuth)) {
      throw new Error("Invalid PQC authorization");
    }
    
    // Transfer with quantum-resistant proof
    this.owner = newOwner;
    this.signature = signWithMLDSA(this);
  }
}

Migration Strategy

Phase 1: Dual Support (Current)

Support both classical and PQC
New contracts PQC-enabled
Gradual user migration

Phase 2: PQC Default (Q2 2025)

PQC becomes default
Classical marked deprecated
Migration incentives

Phase 3: PQC Only (Q4 2025)

Classical support removed
Full quantum resistance
Legacy bridge for old assets

Privacy Tiers

Tier	Application	Protection Level
0	Public data	Basic PQC
1	User assets	+ Encrypted storage
2	High-value NFTs	+ TEE verification
3	Treasury ops	+ Multi-sig PQC
4	Critical infrastructure	+ Full TEE-I/O

Rationale

Why Now?

Quantum Timeline: Threats expected within 5-10 years
Asset Longevity: NFTs and DeFi positions held long-term
First Mover: Competitive advantage in security
User Trust: Demonstrates commitment to security

Why These Algorithms?

ML-KEM-768: Optimal balance of security and performance
ML-DSA-65: Reasonable signature sizes for blockchain
Hybrid Mode: Protection against both quantum and classical attacks

Security Considerations

Threat Model

Quantum Attacks: Shor's algorithm breaks ECDSA
Retroactive Attacks: "Harvest now, decrypt later"
Smart Contract Risks: Immutable code needs future-proof security
Cross-chain Risks: Bridge security critical

Risk Mitigation

Regular Audits: Continuous security assessment
Bug Bounties: Incentivize vulnerability discovery
Insurance Fund: Coverage for potential issues
Gradual Rollout: Phased implementation

Implementation

Completed

Lux Network PQC (LP-100)
Core library integration
Initial testing

Q1 2025

Smart contract templates
Wallet SDK updates
NFT standard finalization

Q2 2025

DeFi protocol migration
Gaming integration
User migration tools

Q3 2025

Full ecosystem coverage
Performance optimization
Documentation complete

Testing

Security Tests

Quantum attack simulation
Side-channel analysis
Formal verification

Integration Tests

Cross-chain compatibility
Wallet integration
Gas optimization

Performance Benchmarks

Transaction throughput
Signature verification time
Storage requirements

Reference Implementation

Repository: zooai/pqc

Key Files:

/crypto/ml_dsa.rs - ML-DSA (FIPS 204) implementation
/crypto/ml_kem.rs - ML-KEM (FIPS 203) implementation
/crypto/slh_dsa.rs - SLH-DSA (FIPS 205) implementation
/contracts/PQCWallet.sol - Post-quantum wallet contract
/contracts/PQCSignatureVerifier.sol - On-chain signature verification
/contracts/PQCERC721.sol - Post-quantum NFT standard
/sdk/typescript/ - TypeScript SDK for PQC operations
/sdk/rust/ - Rust SDK for high-performance applications
/migration/wallet_migration.py - Tool for migrating existing wallets
/migration/contract_migration.sol - Contract upgrade patterns
/tests/quantum_attack_sim.py - Quantum attack simulation tests
/tests/performance_benchmarks.rs - Performance testing suite
/docs/migration_guide.md - Step-by-step migration instructions

Status: Implemented (Based on LP-100 integration)

Reference Standards:

NIST FIPS 203 (ML-KEM)
NIST FIPS 204 (ML-DSA)
NIST FIPS 205 (SLH-DSA)
Lux LP-200 (Post-Quantum Cryptography Suite)

Integration with Lux:

Shares crypto primitives with Lux Network LP-200
Compatible with Lux post-quantum precompiles
Cross-chain PQC message verification

Post-Quantum Security for DeFi & NFTs