7 min read
EMV Cryptograms: How ARQC Prevents Fraud
Every time you tap or insert a chip card, the card generates a unique cryptogram — a cryptographic proof that this specific transaction is legitimate and hasn’t been seen …
50 pages
Blog
7 min read
RSA Algorithm: Theory and Implementation
Author: Vincent Bevia, MSc Computer Science — University of Liverpool Introduction RSA (Rivest–Shamir–Adleman) is one of the first public-key cryptosystems and is widely used for …
5 min read
Nexo Protocol Adoption in Modern SmartPOS Architectures
Modern payment terminal architectures increasingly rely on standardized protocols to reduce integration costs, ensure interoperability, and simplify expansion across markets. …
5 min read
Types of POS Terminals and Where They Fit
Types of POS Terminals, the Services They Offer, and Where They Fit Modern POS environments are built from a small number of terminal families, each tuned to a specific risk …
1 min read
IPEK Derivation & Terminal Key Injection
This page shows a full interactive layout explaining DUKPT / IPEK derivation and terminal key injection. The interactive example is anchored in the key-management and POS security …
3 min read
Track 2 Data — Technical Overview (and Why It's Slowly Disappearing)
Track 2 is the numeric-only magnetic-stripe data format defined in ISO/IEC 7813, with a maximum length of 40 characters. The discussion here complements the broader POS and EMV …
2 min read
EMV for Developers: What You Really Need to Know
Most developers working with payments eventually run into EMV — often described as complicated, arcane, or impossible to understand without a 300-page spec. The reality is simpler: …
2 min read
What Is a POS System? A Practical Overview
A Point-of-Sale (POS) system is the starting point of nearly every electronic payment. Although it looks simple to the end user — tap a card, enter a PIN, get a receipt — a POS is …
1 min read
Welcome to Corebaseit
Welcome to Corebaseit — my blog on POS, EMV, payments, and AI. I’m Vincent Bevia. I work on payments at Multisafepay (part of Ant Group), and I’ve spent years in POS …
6 min read
Why Your Data “Leaks”: The Surprising Physics of Successful Communication In our hyper-connected economy, we view seamless digital communication as a baseline …