Supply Chain Verification

The Supply Chain Trust Problem

Global supply chains involve dozens of intermediaries. Buyers need assurance about origin, quality, and ethical sourcing — but suppliers resist revealing proprietary details.

ZK proofs bridge this gap.

Use Case: Country of Origin

Scenario: Prove goods originated from an approved country list without revealing the specific supplier or factory.

Encode approved countries as numeric IDs. The circuit checks membership:

{
  "inputs": {
    "public": ["approved_region_hash"],
    "private": ["origin_country_code"]
  },
  "gates": [
    { "type": "eq", "inputs": ["origin_country_code", "approved_region_hash"], "output": "approved" }
  ],
  "outputs": ["approved"]
}

Use Case: Quality Score Threshold

Prove that a batch quality score exceeds a minimum standard:

The buyer sees: "Quality meets standard." The buyer doesn't see: the exact score or testing methodology.

Use Case: Ethical Sourcing Composite

Combine multiple checks into a single proof:

Each check is a gate. The `mul` gate chains them as AND logic. One proof covers all three claims.

Benefits