Payment Security Guide

Payment and billing security reference for 007 audit and 007 threat-model.

Covers

• PCI-DSS mindset and payment data handling
• Webhook signature validation and replay protection
• Idempotency keys and antifraud controls
• Tokenization and secret handling
• Logging, alerting, and privilege separation

Use When

• Reviewing Stripe, billing, invoicing, or webhook code
• Auditing checkout, subscription, or payment flows
• Threat modeling financial and fraud-sensitive systems