Comprehensive principal engineering guide to card security architectures — EMVCo Network Tokenization (VTS, MDES, Apple Pay DPAN), Account Updater, dynamic cryptograms (TAVV/DSRP), EMV 3-D Secure 2.2/2.3 protocol, liability shifts, and PCI-DSS scope reduction.
Enterprise engineering guide to securing payment processing systems — client-side mTLS, RFC 9421 HTTP message signatures, DPoP token binding, PSD2 dynamic linking, internal Zero Trust SPIFFE mesh, PCI-HSMs, tokenization vaults, and Maker-Checker dual control.
Engineering guide to GDPR, CCPA, PCI-DSS, HIPAA, and SOC 2 compliance — covering data classification, right to erasure, data minimization, consent management, audit logging, and privacy-by-design.
