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aitbc/docs/12_issues/zk-implementation-risk.md
oib 15427c96c0 chore: update file permissions to executable across repository 
- Change file mode from 644 to 755 for all project files
- Add chain_id parameter to get_balance RPC endpoint with default "ait-devnet"
- Rename Miner.extra_meta_data to extra_metadata for consistency
2026-03-06 22:17:54 +01:00

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ZK-Proof Implementation Risk Assessment

Current State

  • Libraries Used: Circom 2.2.3 + snarkjs (Groth16)
  • Circuit Location: apps/zk-circuits/
  • Verifier Contract: contracts/contracts/ZKReceiptVerifier.sol
  • Status: ✅ COMPLETE - Full implementation with trusted setup and snarkjs-generated verifier

Findings

1. Library Usage ✅

  • Using established libraries: Circom and snarkjs
  • Groth16 setup via snarkjs (industry standard)
  • Not rolling a custom ZK system from scratch

2. Implementation Status ✅ RESOLVED

  • ✅ Groth16Verifier.sol replaced with snarkjs-generated verifier
  • ✅ Real verification key embedded from trusted setup ceremony
  • ✅ Trusted setup ceremony completed with multiple contributions
  • ✅ Circuits compiled and proof generation/verification tested

3. Security Surface ✅ MITIGATED

  • ✅ Trusted Setup: MPC ceremony completed with proper toxic waste destruction
  • ✅ Circuit Correctness: SimpleReceipt circuit compiled and tested
  • ✅ Integration Risk: On-chain verifier now uses real snarkjs-generated verification key

Implementation Summary

Completed Tasks ✅

  • Replace Groth16Verifier.sol with snarkjs-generated verifier
  • Complete trusted setup ceremony with multiple contributions
  • Compile Circom circuits (receipt_simple, modular_ml_components)
  • Generate proving keys and verification keys
  • Test proof generation and verification
  • Update smart contract integration

Generated Artifacts

  • Circuit files: .r1cs, .wasm, .sym for all circuits
  • Trusted setup: pot12_final.ptau with proper ceremony
  • Proving keys: receipt_simple_0002.zkey, test_final_v2_0001.zkey
  • Verification keys: receipt_simple.vkey, test_final_v2.vkey
  • Solidity verifier: Updated contracts/contracts/Groth16Verifier.sol

Recommendations

Production Readiness ✅

  • ✅ ZK-Proof system is production-ready with proper implementation
  • ✅ All security mitigations are in place
  • ✅ Verification tests pass successfully
  • ✅ Smart contract integration complete

Future Enhancements

  • Formal verification of circuits (optional for additional security)
  • Circuit optimization for performance
  • Additional ZK-Proof use cases development

Status: ✅ PRODUCTION READY

The ZK-Proof implementation is now complete and production-ready with all security mitigations in place.