CRYPTOMATHIC BLOG

 

ANSI X9.24

Cardholder, Merchant, Issuer & Acquirer - The Four Corners Model for Payment Security and Key Management

4 min read

The Four Corners Model for Card Payment Security and Key Management

The “Four Corners” model, also called the “Four Party Scheme”, is utilized in almost all standard card payment systems across the globe. Here, we...

Read More
TR-34 Key Blocks for the TR-34 Exchange Protocol: Basic Principles

4 min read

TR-34 Key Blocks for the TR-34 Exchange Protocol: Basic Principles

Among all the various key block formats, the TR-34 format is undoubtedly one of the most sophisticated. The TR-34 norm is an implementation of the...

Read More

3 min read

EMV Payment Security - Issuers

An issuer is one of the corners in the ‘four corner’ model. An issuer is a financial organization (e.g. a bank) that produces payment cards and...

Read More
An Overview of the Different Key Block Formats

2 min read

An Overview of the Different Key Block Formats

A key block is a unique piece of cryptography that is used to protect cryptographic keys while they are being sent over networks that might not be...

Read More
Payment Security - Cardholders

4 min read

EMV Payment Security - Cardholders

Cardholders (or consumers) are one of the corners of the ‘four corner’ model in the payment card world. Here we take a brief look at the payment...

Read More
ANSI X9.24-1-2017: Key Replacement, Destruction, and Archiving

2 min read

ANSI X9.24-1-2017: Key Replacement, Destruction, and Archiving

One aspect of key management is dealing with what happens when a symmetric cryptographic key is no longer needed. The section ‘Key Replacement,...

Read More

2 min read

ANSI X9.24-1-2017: Key Loading

The ANSI X9.24-1-2017 standard defines the requirements for the loading of key components or shares, and the loading of cleartext keys. The loading...

Read More
Why a Key Management System Must Understand ANSI X9.24/TR-31 Key Blocks

3 min read

Why Key Management Systems Must Understand ANSI X9.24/TR-31 Key Blocks

The PCI Council requires most actors of payment networks to implement ANSI X9.24/TR-31-compliant key blocks to wrap and securely transmit, transfer,...

Read More
Introduction to Cryptographic Key Blocks - FAQs

2 min read

Introduction to Cryptographic Key Blocks - FAQs

This article proposes answers to a series of frequently asked questions (FAQs) about key blocks.

Read More