Feature: Zero-knowledge proof of policy compliance for privacy-preserving audits

[cdzzy]

Problem

Compliance audits require proving that agents followed policies, but sharing full audit logs exposes sensitive business data. We need a way to prove compliance without revealing the underlying data.

Proposed Solution: ZK Compliance Proofs

const shield = new TraceShield({
  compliance: {
    zkProofs: {
      enabled: true,
      circuit: "policy-compliance-v1",  // Pre-compiled ZK circuit
      publicParams: await generatePublicParams()
    }
  }
})

// Agent actions are recorded and proven compliant
await shield.record(action, {
  policy: "no-customer-data-export",
  proof: await generateZKProof({
    witness: action.metadata,
    circuit: "policy-compliance-v1"
  })
})

// Auditors verify compliance without seeing data
const audit = await shield.verifyCompliance({
  policy: "no-customer-data-export",
  startDate: "2026-01-01",
  endDate: "2026-03-31",
  proofOnly: true  // No raw data exposed
})

console.log(audit)
// {
//   compliant: true,
//   proof: "zk-SNARK proof string",
//   summaryHash: "abc123..."  // Hash of underlying data for verification
// }

How ZK Proofs Work

1. Agent action → recorded with witness data
2. Witness → ZK circuit → proof
3. Proof stored on blockchain/audit log
4. Auditor verifies proof (not data) → compliance confirmed

Privacy Properties

• Zero data exposure: auditors see only compliance status
• Non-interactive: proofs can be verified anytime
• Tamper-proof: ZK guarantees integrity
• Minimal trust: no trusted third party

Use Cases

• Cross-border data compliance (GDPR + local laws)
• Financial audits without exposing trading strategies
• Healthcare HIPAA compliance without patient data exposure

This is cutting-edge privacy-preserving compliance.