PCI-DSS

Prerequisite: Read Part 5: ISO 8583 & ISO 20022 Financial Standards for payment switch mechanics. Part 6: Core Banking Security, PCI-DSS & Audit Trails Answer-first: Core banking security mandates a defense-in-depth zero-trust topology anchored by tamper-resistant Hardware Security Modules (HSM) for cryptographic key lifecycles, ANSI X9.8 PIN block translations, envelope field-level encryption (AES-256-GCM) for sensitive customer PII, and cryptographically hashed append-only audit trails. Enforcing strict compliance with PCI-DSS v4.0.1 and central bank cybersecurity mandates (such as SBV Circular 09/2020/TT-NHNN) ensures continuous operational resilience against insider threats and sophisticated external cyber attacks. ...

Zero-Trust Service Mesh Security in Go: SPIFFE/SPIRE & Istio Answer-first: Zero-trust service mesh security in Go uses SPIFFE/SPIRE identity attestation and Istio mTLS to enforce cryptographically verified workload identities and least-privilege API access. Introduction: The Zero-Trust Imperative in Modern Financial Microservices Traditional perimeter security models relying on firewalls, Virtual Private Clouds, and static IP addresses fail to protect modern microservices processing sensitive payment data. Container IP addresses are ephemeral and static Kubernetes secrets risk exposure, so enterprise financial architectures need Zero-Trust models that cryptographically authenticate every inter-service communication. ...