Payments Academy

Payment Security

D12 Risk, compliance and regulation · 8 lessons

Version 1.0 | Last reviewed 2026-11-05

Learner explains payment security controls, including encryption, authentication, fraud monitoring, and PCI scope, and assesses the security of a payment flow. Learner applies this skill in realistic banking scenarios, with clear examples and correct terminology throughout.

Payment security: authentication, encryption and trust at every hop.

What You Can Do After This Chapter

Learning objective. Learner explains payment security controls, including encryption, authentication, fraud monitoring, and PCI scope, and assesses the security of a payment flow. Learner applies this skill in realistic banking scenarios, with clear examples and correct terminology throughout.

Practical assessment. Learner reviews a card payment flow handling 10,000 transactions per day and identifies six security gaps, including unencrypted card data, weak authentication, and missing logging. Learner then recommends a control for each gap, states the PCI scope impact, and writes a short incident response plan for a suspected card data breach. Learner submits all work with sources, calculations, and assumptions stated clearly, and reviews the result against the chapter checklist before submission.

Expected deliverables.

Completion criterion. Learner identifies at least five genuine gaps, recommends a valid control for each, and states the PCI scope impact correctly. Completion is judged on accuracy, completeness, and clear written explanation throughout.

In this chapter
  1. The Threat Model for Payment Systems
  2. Customer authentication: passwords, MFA and strong customer authentication
  3. Encryption in Transit and at Rest, Key Management and HSMs
  4. mTLS, API Security and Secure Connectivity
  5. SWIFT Customer Security Programme and Network Security
  6. Fraud Controls, Monitoring and Incident Response
  7. Exercise: Security Review of a Payment API
  8. System authentication: OAuth2 grants, scopes, token lifetimes and certificate rotation

Start Lesson 1: The Threat Model for Payment Systems →