FAPI 2.0 Security: DPoP, mTLS & Sender-Constrained Tokens
Series Navigation: This is Part 6 of the Core Banking Systems Architecture Masterclass. ← Previous: Part 5 — ISO 20022 Payment Gateways | Master Curriculum Hub | Next: Part 7 — Streaming Fraud Detection → | Advisory: Architecture Consulting FAPI 2.0 Security: DPoP, mTLS & Sender-Constrained Tokens Answer-first: The Financial-Grade API (FAPI 2.0) profile establishes mandatory Zero Trust security baselines for Open Banking ecosystems by permanently eliminating bearer token replay vulnerabilities. By enforcing cryptographically sender-constrained tokens via DPoP (RFC 9449) and mutual TLS (RFC 8705), backed by FIPS 140-3 Level 3 Hardware Security Modules (HSMs), core banking systems guarantee non-repudiation and render exfiltrated credentials completely inert. ...