11 pages
Security
Authentication, certifications, PCI compliance, and secure system design
Why PIN Still Matters in Card-Present Payments
Why EMV Chip Cards Resist Cloning: The ARQC Mechanism Explained
L3 Certification Paths Are Not Created Equal: C-TAP, SmartPOS, and SoftPOS
POS Terminal Environment Classifications: Attended, Semi-Attended, and Unattended
Prompt Engineering for POS: Treating LLM Inputs as First-Class Architecture
DUKPT Key Derivation: Technical Reference for POS Systems
PIN Translation: Bridging Cryptographic Worlds Inside the HSM
EMV Cryptograms: How ARQC Prevents Fraud
RSA Algorithm: Theory and Implementation
IPEK Derivation & Terminal Key Injection
1
2