PCI-DSS Scoping
Segmentation and tokenisation to shrink what is in scope, because scope is the cost.
6 to work through
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intermediate
An e-commerce site collects card details in its own form and posts them to a payment provider's API. What would you change and why?
2 min answer -
advanced
A commerce platform wants to reduce the systems in scope for payment card compliance. What architecture achieves that?
2 min answer -
advanced
A merchant keeps card entry inside a provider-hosted iframe and believes its scope is minimal. Customer support uses a screen-sharing tool that can see and record the customer's browser during checkout, calls are recorded, and a session-replay script runs on every page for analytics. Review the arrangement.
3 min answer -
advanced
A payments platform wants to reduce the systems subject to card-data compliance. What actually reduces scope, and what does not?
2 min answer -
advanced
An e-commerce platform stores card numbers to support repeat purchases. How do you reduce PCI scope?
2 min answer -
advanced
Your first PCI assessment finds the whole estate in scope. How did that happen and how do you reduce it?
2 min answer
4 terms in this topic
Compliance Perimeter
The set of systems subject to a compliance regime - whose size is the dominant cost of that regime, and which is determined by architectural decision…
practiceCompliance Scope Boundary
The set of systems subject to a compliance regime - determined by where regulated data flows, and reducible by architecture rather than by adding controls.
practicePCI DSS Scope Reduction
Deliberately limiting which systems handle cardholder data so that the audited estate is small, since every in-scope system carries the full control …
practiceScope Reduction
Shrinking the set of systems that store, process or transmit cardholder data, because the cost of the standard is proportional to the number of syste…
Neighbouring topics
Regulatory & Data Protection Architecture
General material on designing under legal and regulatory obligation.
Privacy by Design
Data minimisation, default protection and purpose binding as structural decisions.
Lawful Basis & Purpose Limitation
Why you may hold the data, and why that forbids the second use somebody proposed.
Data Subject Rights
Access, correction, portability and erasure across systems that never planned for them.
Consent Architecture
Capturing, versioning and propagating consent to every system that acts on the data.
Data Residency
Keeping data within a jurisdiction, including backups, logs and support access.
Digital Sovereignty
Control over data, operations and the operator, beyond where the bytes physically sit.
Cross-Border Transfer
The legal mechanism that permits data to leave, and the architecture that respects it.
Healthcare Data Protection
PHI handling, minimum necessary access, and audit expectations in clinical systems.
Financial Services Regulation
Operational resilience, payment rules and supervisory expectations as design inputs.
Records Retention & Legal Hold
Keeping what must be kept, deleting what must go, and freezing both on demand.
Erasure vs Immutability
Deletion obligations against event logs, backups and ledgers designed never to forget.
Pseudonymisation
Separating identity from record, and the re-identification risk that remains.
Privacy-Enhancing Technologies
Differential privacy, secure enclaves and federated computation, and what each buys.
Regulatory Reporting Pipelines
Submissions with fixed deadlines, fixed formats, and a regulator who audits the lineage.
Sector Cloud Rules
Regulator expectations for cloud use, exit plans and material outsourcing notification.
Exit & Concentration Risk
Being able to leave a provider, and what the regulator asks when you cannot.
Third-Party Risk
Assessing, contracting and monitoring the vendors your architecture now depends on.
Geo-Restriction & Sanctions
Blocking access by jurisdiction, and the accuracy and evasion problems that come with it.