Payment Systems Security

2.

Core Security Principles

2.1.

Information Security Fundamentals

2.1.1.

Confidentiality

2.1.1.1.

Data Privacy Requirements

2.1.1.2.

Information Classification

2.1.1.3.

Access Control Mechanisms

2.1.1.4.

Encryption for Data Protection

2.1.2.

2.1.2.1.

Data Integrity Controls

2.1.2.2.

Transaction Integrity Verification

2.1.2.3.

Message Authentication

2.1.2.4.

Digital Signatures

2.1.3.

2.1.3.1.

System Uptime Requirements

2.1.3.2.

Redundancy and Failover

2.1.3.3.

Disaster Recovery Planning

2.1.3.4.

Denial-of-Service Mitigation

2.2.

Extended Security Concepts

2.2.1.

2.2.1.1.

Identity Verification Methods

2.2.1.2.

Strong Customer Authentication

2.2.1.3.

Multi-Factor Authentication

2.2.1.4.

Biometric Authentication Systems

2.2.2.

2.2.2.1.

Access Control Models

2.2.2.2.

Role-Based Access Control

2.2.2.3.

Attribute-Based Access Control

2.2.2.4.

Least Privilege Principle

2.2.3.

2.2.3.1.

Audit Trail Requirements

2.2.3.2.

User Activity Monitoring

2.2.3.3.

Transaction Logging

2.2.3.4.

Compliance Reporting

2.2.4.

Non-Repudiation

2.2.4.1.

Digital Signature Implementation

2.2.4.2.

Transaction Evidence

2.2.4.3.

Legal Framework Support

2.2.4.4.

Dispute Resolution Support

2.3.

Defense in Depth Strategy

2.3.1.

Layered Security Architecture

2.3.2.

Security Control Categories

2.3.3.

Redundancy Planning

2.3.4.

Security Policy Framework

2.3.5.

Risk-Based Security Controls

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1. Foundations of Payment Systems

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3. Cryptographic Controls and Data Protection