Vendor Minimum Payload

Patent Claims — Reduction to Practice

• Vendor declares transaction-schema listing strictly required fields
• User device verifies schema conforms to registered transaction type
• Only minimum registered fields transmitted — all others withheld at source
• Vendor schema exceeding registered minimum rejected — fail-closed
• ECOMMERCE_PURCHASE: name + address + payment token only — no email/phone/demographics
• PAYMENT_PROCESSOR: cardholder name, billing, card, expiry, CVV — nothing beyond
• ADTECH_AUDIENCE_MATCH: affinity vector + age-band only — no name/email/device ID
• Registry stored on user device — updateable only by bound identity
• Cryptographic withholding: withheld fields are sealed, not merely omitted
• Reduces vendor data collection to provable legal minimum per transaction type