10 PCI Assessment
A PCI DSS assessment is the structured process used to determine whether an organization’s payment environment satisfies applicable PCI DSS requirements.
It brings together everything covered so far:
PCI Scope ↓CDE ↓Network Segmentation ↓Access Control ↓Vulnerability Management ↓Logging ↓Secure Development ↓Penetration Testing ↓AssessmentThe assessment does not simply ask:
Do we have security controls?It asks:
Which PCI requirements apply? ↓Which controls satisfy them? ↓Are those controls implemented? ↓Are they operating? ↓Can we prove it? ↓Are there gaps? ↓Have gaps been remediated?The central question is:
Can the organization demonstrate, with reliable evidence, that applicable PCI DSS requirements are implemented and operating across the complete in-scope environment?
Learning Objectives
Section titled “Learning Objectives”By the end of this lesson, you will be able to:
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Explain the purpose of a PCI DSS assessment.
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Understand different assessment and validation models.
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Define PCI assessment scope.
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Build a Requirement Applicability Matrix.
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Identify control owners.
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Prepare an evidence request list.
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Understand assessment evidence.
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Conduct interviews and walkthroughs.
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Perform technical validation.
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Build testing populations.
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Select and test samples.
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Identify assessment findings.
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Classify compliance gaps.
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Manage remediation.
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Perform retesting.
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Understand compensating controls.
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Understand the Customized Approach.
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Coordinate with QSAs and internal assessors.
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Build a PCI assessment dashboard.
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Determine readiness for compliance validation.
1. What Is a PCI DSS Assessment?
Section titled “1. What Is a PCI DSS Assessment?”A PCI DSS assessment evaluates whether applicable PCI DSS requirements have been implemented correctly.
A practical assessment model:
Requirement ↓Control ↓Implementation ↓Evidence ↓Testing ↓Conclusion2. Assessment Is Not Just Document Review
Section titled “2. Assessment Is Not Just Document Review”A weak assessment might look like:
Policy Exists ↓Requirement Marked CompliantA stronger assessment asks:
Policy +Configuration +Operation +Evidence +Testing3. Assessment Objectives
Section titled “3. Assessment Objectives”The assessment should determine whether controls are:
Defined
Implemented
Operating
Evidence Supported
Sustainable4. Assessment Inputs
Section titled “4. Assessment Inputs”Before assessment begins, collect:
PCI Scope Statement
CDE Asset Inventory
Network Diagram
Cardholder Data Flow
Service Provider Register
Responsibility Matrix
Control Inventory
Policies
Technical Evidence5. Confirm Assessment Type
Section titled “5. Confirm Assessment Type”The organization should understand which validation approach applies.
Potential mechanisms include:
Self-Assessment Questionnaire
Report on Compliance
Attestation of Compliancedepending on merchant/service-provider classification, payment-brand rules, acquiring relationships, and applicable validation requirements.
6. Self-Assessment Questionnaire
Section titled “6. Self-Assessment Questionnaire”A:
SAQis used by eligible organizations to perform structured self-assessment.
Different SAQs exist for different payment environments.
7. Report on Compliance
Section titled “7. Report on Compliance”A:
ROCis a detailed assessment report commonly used for organizations requiring a formal assessment at that level.
8. Attestation of Compliance
Section titled “8. Attestation of Compliance”An:
AOCrecords the organization’s attestation related to the applicable PCI DSS assessment.
9. Qualified Security Assessor
Section titled “9. Qualified Security Assessor”A:
QSAis a qualified PCI DSS assessor associated with a Qualified Security Assessor Company.
QSAs may perform formal assessments where required.
10. Internal Assessment
Section titled “10. Internal Assessment”Some organizations also maintain qualified internal assessment capability.
However, internal readiness work should still use the same discipline:
Requirement ↓Evidence ↓Testing ↓Conclusion11. Assessment Lifecycle
Section titled “11. Assessment Lifecycle”A mature PCI assessment lifecycle looks like:
Planning ↓Scope Confirmation ↓Requirement Applicability ↓Evidence Collection ↓Walkthroughs ↓Testing ↓Findings ↓Remediation ↓Retesting ↓Final Validation12. Build PCI Assessment Plan
Section titled “12. Build PCI Assessment Plan”Create:
01 PCI Assessment PlanInclude:
| Field | Details |
|---|---|
| Assessment Type | |
| Assessment Period | |
| PCI Scope | |
| Assessor | |
| Internal Owner | |
| Target Completion | |
| Validation Method |
13. Define Assessment Governance
Section titled “13. Define Assessment Governance”Identify:
Executive Sponsor
PCI Program Owner
GRC Lead
Technical Owners
Evidence Owners
Assessor14. Assessment RACI
Section titled “14. Assessment RACI”Create:
02 PCI Assessment RACIUse:
| Activity | GRC | Security | Engineering | System Owner | Assessor |
|---|
15. Phase 1 — Confirm PCI Scope
Section titled “15. Phase 1 — Confirm PCI Scope”Do not start testing requirements before confirming scope.
Use:
Payment Channels
CHD Flow
CDE
Connected Systems
Security-Impacting Systems
People
Processes
Third Parties16. Scope Confirmation Questions
Section titled “16. Scope Confirmation Questions”Ask:
Has architecture changed?
Any new payment channels?
Any new providers?
Any new cloud accounts?
Any new applications?
Any new data stores?
Any new network connections?17. Scope Validation
Section titled “17. Scope Validation”Reconcile:
Asset Inventory ↓Network Diagram ↓Data Flow ↓Actual Environment18. Scope Gap Example
Section titled “18. Scope Gap Example”Documentation shows:
40 CDE Assetscloud inventory shows:
46Gap:
6 Undocumented AssetsAssessment should pause or expand scope until understood.
19. Build Scope Validation Register
Section titled “19. Build Scope Validation Register”Create:
03 PCI Assessment Scope Validation RegisterUse:
| Area | Expected | Actual | Status | Action |
|---|
20. Phase 2 — Determine Requirement Applicability
Section titled “20. Phase 2 — Determine Requirement Applicability”Not every environment implements every requirement in exactly the same way.
Create:
04 PCI Requirement Applicability MatrixUse:
| Requirement | Applicable | Control | Owner | Rationale |
|---|
21. Applicability Should Be Defensible
Section titled “21. Applicability Should Be Defensible”Do not mark:
Not Applicablesimply because:
We Don't Use That ControlThere must be a valid architectural or business reason.
22. Example — Wireless
Section titled “22. Example — Wireless”If organization has no wireless systems within or connected to the relevant environment:
Wireless Controls→ Applicability EvaluatedDocument the reasoning and evidence.
23. Example — Stored PAN
Section titled “23. Example — Stored PAN”If organization never stores PAN:
Stored Account Data Controlsmay have different applicability than an environment maintaining payment databases.
But the absence of storage must be validated.
24. Defined Approach
Section titled “24. Defined Approach”The Defined Approach uses the control requirements explicitly described by PCI DSS.
Model:
PCI Requirement ↓Defined Control ↓Implementation ↓Testing25. Customized Approach
Section titled “25. Customized Approach”Where permitted, an organization may use a Customized Approach.
Model:
Security Objective ↓Customized Control ↓Targeted Risk Analysis ↓Testing ↓Evidence26. Customized Approach Requires Rigor
Section titled “26. Customized Approach Requires Rigor”It is not:
We Don't Want to Followthe Defined RequirementIt requires strong documentation and validation.
27. Customized Control Evidence
Section titled “27. Customized Control Evidence”Include:
Security Objective
Control Design
Risk Analysis
Testing Method
Evidence
Validation28. Phase 3 — Build PCI Control Mapping
Section titled “28. Phase 3 — Build PCI Control Mapping”Map each applicable requirement to an enterprise control.
Create:
05 PCI Control MappingUse:
| PCI Requirement | Enterprise Control | Owner | Evidence |
|---|
29. Reuse Enterprise Controls
Section titled “29. Reuse Enterprise Controls”Example:
Privileged MFAmay support:
PCI
SOC 2
ISO 27001Avoid unnecessary duplication.
30. Control Owner
Section titled “30. Control Owner”Every PCI control should have:
Control Ownerresponsible for the control design and operation.
31. Evidence Owner
Section titled “31. Evidence Owner”Evidence collection may belong to:
Control Operator
GRC
System Administrator
Security Analystdepending on the process.
32. Phase 4 — Build Evidence Request List
Section titled “32. Phase 4 — Build Evidence Request List”Create:
06 PCI Evidence Request ListUse:
| Request ID | Requirement | Evidence | Owner | Due |
|---|
33. Typical PCI Evidence
Section titled “33. Typical PCI Evidence”Examples:
Network Diagrams
Data Flow Diagrams
Firewall Rules
IAM Reports
MFA Coverage
Access Reviews
Vulnerability Scans
ASV Reports
Penetration Tests
Log Reviews
Training Records
Policies
Provider AOCs34. Evidence Should Be Authoritative
Section titled “34. Evidence Should Be Authoritative”Strong:
IAM ExportWeak:
Manually Typed User Listwhen the identity platform is available.
35. Evidence Quality
Section titled “35. Evidence Quality”Ask:
Relevant?
Reliable?
Complete?
Correct Period?
Traceable?
Current?36. Evidence Status
Section titled “36. Evidence Status”Use:
Requested
Received
Under Review
Accepted
Rejected
Missing37. Build Evidence Tracker
Section titled “37. Build Evidence Tracker”Create:
07 PCI Evidence TrackerUse:
| Request | Owner | Received | Quality | Status |
|---|
38. Weak Evidence Example
Section titled “38. Weak Evidence Example”Requirement:
Quarterly Access ReviewEvidence:
Screenshot of Current UsersMissing:
Reviewer
Review Date
Decision
Removed AccessStatus:
Rejected39. Phase 5 — Perform Walkthroughs
Section titled “39. Phase 5 — Perform Walkthroughs”Walkthroughs help the assessor understand how a control operates.
Example:
User Access Request ↓Approval ↓Provisioning ↓MFA ↓Access Review40. Walkthrough Participants
Section titled “40. Walkthrough Participants”May include:
GRC
Control Owner
Operator
Security
Engineer
Assessor41. Build Walkthrough Schedule
Section titled “41. Build Walkthrough Schedule”Create:
08 PCI Control Walkthrough ScheduleUse:
| Control | Owner | Date | Assessor | Status |
|---|
42. Walkthrough Questions
Section titled “42. Walkthrough Questions”Ask:
What triggers the control?
Who performs it?
How often?
Which system?
What evidence is created?
What happens if it fails?43. Use Real Examples
Section titled “43. Use Real Examples”Weak:
"This is how we normally do it."Strong:
Real Ticket ↓Real Approval ↓Real Provisioning44. Phase 6 — Build Control Populations
Section titled “44. Phase 6 — Build Control Populations”Many controls operate multiple times.
Examples:
All New Users
All Terminations
All Firewall Changes
All Production Changes
All Critical Vulnerabilities
All Log Reviews45. Population Completeness
Section titled “45. Population Completeness”A sample is valid only if the population is complete.
Example:
HR Terminations:80IAM termination list:
76Difference:
4Investigate before sampling.
46. Build Population Register
Section titled “46. Build Population Register”Create:
09 PCI Control Population RegisterUse:
| Control | Population | Source | Period | Count |
|---|
47. Population Source
Section titled “47. Population Source”Use authoritative sources such as:
HR
IAM
Ticketing
CI/CD
Vulnerability Scanner
SIEM48. Population Query Logic
Section titled “48. Population Query Logic”Document:
System
Date Range
Filter
Query
Record Count49. Phase 7 — Perform Sample Testing
Section titled “49. Phase 7 — Perform Sample Testing”The assessor may select samples.
Example:
Population:500 Production Changes
Sample:30Each sample should be tested consistently.
50. Build Control Testing Workbook
Section titled “50. Build Control Testing Workbook”Create:
10 PCI Control Testing WorkbookUse:
| Control | Population | Sample | Test | Result | Conclusion |
|---|
51. Access Provisioning Test
Section titled “51. Access Provisioning Test”Verify:
Request
Approval
Correct Role
Provisioning
MFA52. Termination Test
Section titled “52. Termination Test”Verify:
Termination Date
Disablement Date
Privileged Access Removal53. Firewall Change Test
Section titled “53. Firewall Change Test”Verify:
Request
Business Need
Approval
Implementation
Validation54. Vulnerability Test
Section titled “54. Vulnerability Test”Verify:
Finding
Severity
Due Date
Remediation
Retest55. Log Review Test
Section titled “55. Log Review Test”Verify:
Required Review
Reviewer
Date
Findings
Follow-Up56. Penetration Testing Test
Section titled “56. Penetration Testing Test”Verify:
Scope
Tester
Methodology
Findings
Remediation
Retest57. Phase 8 — Technical Testing
Section titled “57. Phase 8 — Technical Testing”An assessor may directly inspect technical controls.
Examples:
Firewall Configuration
MFA Settings
Encryption
Logging
Network Segmentation
System Hardening58. Configuration Inspection
Section titled “58. Configuration Inspection”Example:
Requirement:
Administrative Access RestrictedAssessor verifies:
Firewall Rule
Security Group
Route
Authentication59. Evidence vs Observation
Section titled “59. Evidence vs Observation”Evidence:
Screenshot / ExportObservation:
Assessor Watchesthe Configuration LiveBoth can support assessment.
60. Interviews
Section titled “60. Interviews”Interviews can confirm whether personnel understand:
Roles
Security Responsibilities
Incident Procedures
Payment Data Handling61. Assessment Methods
Section titled “61. Assessment Methods”A professional assessment may combine:
Examine
Observe
Interview
Test62. Examine
Section titled “62. Examine”Review:
Policies
Configurations
Reports
Records63. Observe
Section titled “63. Observe”Watch:
Physical Controls
Operational Process
System Configuration64. Interview
Section titled “64. Interview”Confirm:
Knowledge
Ownership
Process65. Test
Section titled “65. Test”Validate:
Control Operation
Security Enforcement
Sample Evidence66. Phase 9 — Identify Findings
Section titled “66. Phase 9 — Identify Findings”When evidence does not meet the requirement, document a finding.
Create:
11 PCI Assessment Finding RegisterUse:
| Finding | Requirement | Condition | Severity | Owner |
|---|
67. Finding Types
Section titled “67. Finding Types”Use categories such as:
Scope
Design
Implementation
Operating Effectiveness
Evidence
Technical Configuration
Third Party68. Design Gap
Section titled “68. Design Gap”Example:
No Process Existsfor Quarterly Access Review69. Implementation Gap
Section titled “69. Implementation Gap”Policy requires:
MFAbut:
2 Admin AccountsDo Not Have MFA70. Operating Gap
Section titled “70. Operating Gap”Control is defined:
Quarterly Reviewbut:
Q3 Review Missing71. Evidence Gap
Section titled “71. Evidence Gap”Control owner states:
Review Was Completedbut:
No Reliable Evidence72. Scope Gap
Section titled “72. Scope Gap”A payment database exists but is:
Missing From CDE Inventory73. Technical Gap
Section titled “73. Technical Gap”Example:
Firewall Allows0.0.0.0/0to Admin Port74. Third-Party Gap
Section titled “74. Third-Party Gap”Example:
Payment ProviderHas No Current PCI AOC75. Severity
Section titled “75. Severity”Possible organizational severity:
Critical
High
Medium
LowAssessment conclusion should still align with the exact PCI requirement status.
76. Finding Example — MFA
Section titled “76. Finding Example — MFA”Requirement:
Strong AuthenticationCondition:
2 / 45 AdministratorsWithout MFAClassification:
Implementation / Operating Gap77. Finding Example — ASV
Section titled “77. Finding Example — ASV”Expected:
Passing Quarterly ASV ScanActual:
Q2 Scan FailedNo Passing RescanClassification:
Operating Gap78. Finding Example — Logging
Section titled “78. Finding Example — Logging”Expected:
Required Log RetentionActual:
Database Logs Retained 60 DaysClassification:
Configuration / Operating Gap79. Finding Example — Pen Test
Section titled “79. Finding Example — Pen Test”Expected:
Annual Penetration TestActual:
Last Completed 18 Months AgoClassification:
Operating Gap80. Phase 10 — Root Cause Analysis
Section titled “80. Phase 10 — Root Cause Analysis”Do not stop at:
Team ForgotIdentify systemic causes.
Example:
Missed Quarterly Review ↓No Compliance Calendar ↓No Reminder ↓No EscalationRoot cause:
Recurring PCI controls are not centrally scheduled and monitored.
81. Build Root Cause Register
Section titled “81. Build Root Cause Register”Create:
12 PCI Finding Root Cause RegisterUse:
| Finding | Immediate Cause | Root Cause | Corrective Action |
|---|
82. Correction vs Corrective Action
Section titled “82. Correction vs Corrective Action”Correction:
Fix Current ProblemCorrective action:
Prevent Recurrence83. Example
Section titled “83. Example”Finding:
Admin Without MFACorrection:
Enable MFACorrective action:
Automated MFA Coverage Monitoring84. Phase 11 — Remediation
Section titled “84. Phase 11 — Remediation”Create:
13 PCI Remediation TrackerUse:
| Finding | Action | Owner | Target | Status | Retest |
|---|
85. Remediation Prioritization
Section titled “85. Remediation Prioritization”Prioritize based on:
PCI Requirement
Security Risk
CDE Exposure
Customer Impact
Assessment Timeline86. Critical Findings
Section titled “86. Critical Findings”Examples:
Stored SAD
Unauthenticated CDE Access
Internet-Exposed Admin Interface
Segmentation Failure
Critical Vulnerabilityrequire urgent action.
87. Phase 12 — Retesting
Section titled “87. Phase 12 — Retesting”Do not close a finding because:
Owner Says FixedRetest.
Finding ↓Remediation ↓Retest ↓Pass / Fail88. Build Retest Register
Section titled “88. Build Retest Register”Create:
14 PCI Assessment Retest RegisterUse:
| Finding | Fix Date | Retest Date | Result | Reviewer |
|---|
89. Failed Retest
Section titled “89. Failed Retest”If:
Failthen:
Finding Remains Open90. Partial Remediation
Section titled “90. Partial Remediation”Example:
10 Systems Affected
9 Fixed
1 Not FixedConclusion:
Open91. Phase 13 — Compensating Controls
Section titled “91. Phase 13 — Compensating Controls”Where a specific PCI requirement cannot be met as written and compensating controls are permitted under applicable PCI DSS conditions, the organization must demonstrate appropriate compensating controls.
A compensating control is not simply:
Alternative TechnologyIt needs to address the intent and rigor of the original requirement.
92. Compensating Control Documentation
Section titled “92. Compensating Control Documentation”Capture:
Constraint
Original Requirement
Risk
Compensating Control
Validation
Maintenance93. Compensating Control Example
Section titled “93. Compensating Control Example”Legacy system cannot support a specific technical control.
Potential compensating measures:
Network Isolation
Restricted Access
Enhanced Monitoring
Additional Authentication Layersubject to assessor validation and PCI conditions.
94. Phase 14 — Third-Party Validation
Section titled “94. Phase 14 — Third-Party Validation”Review providers supporting the payment environment.
Create:
15 PCI Third-Party Assurance ReviewCheck:
Provider
Service
PCI Responsibility
AOC
Assessment Period
Service Scope95. Provider AOC
Section titled “95. Provider AOC”Do not only check:
Vendor Has AOCCheck whether:
Correct Provider?
Correct Service?
Current Period?
Relevant Scope?96. Shared Responsibility
Section titled “96. Shared Responsibility”Example:
Cloud Provider→ Physical Security
Merchant→ Cloud IAM
Merchant→ Security Groups
Merchant→ Payment Application97. Phase 15 — Assessment Status Dashboard
Section titled “97. Phase 15 — Assessment Status Dashboard”Create:
16 PCI Assessment Status DashboardTrack:
| Metric | Target |
|---|---|
| Requirements Assessed | 100% |
| Evidence Accepted | 100% |
| High Findings Open | 0 |
| Retests Completed | 100% |
| Scope Validated | 100% |
| Provider Assurance Current | 100% |
98. Assessment Status
Section titled “98. Assessment Status”Use:
Not Started
In Progress
Evidence Pending
Testing
Remediation
Retesting
Complete99. Requirement Status
Section titled “99. Requirement Status”Use:
In Place
Not in Place
Not Applicable
Not Testedaccording to the assessment model and applicable reporting format.
100. Be Careful With “Compliant”
Section titled “100. Be Careful With “Compliant””A single control owner should not casually declare:
PCI CompliantThe formal compliance outcome depends on the complete applicable assessment and validation process.
101. Phase 16 — Assessment Readiness Review
Section titled “101. Phase 16 — Assessment Readiness Review”Before formal assessment, perform readiness.
Ask:
Is Scope Stable?
Are Controls Operating?
Is Evidence Complete?
Are Required Scans Passing?
Is Pen Testing Current?
Are High Findings Closed?
Are Providers Current?102. Build PCI Assessment Readiness Checklist
Section titled “102. Build PCI Assessment Readiness Checklist”Create:
17 PCI Assessment Readiness Checklist-
PCI scope statement current.
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CDE asset inventory current.
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network diagram current.
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CHD data flow current.
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third parties identified.
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segmentation validated.
Requirements
Section titled “Requirements”-
applicability matrix complete.
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controls mapped.
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control owners assigned.
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Customized Approach items documented where used.
Evidence
Section titled “Evidence”-
evidence request list complete.
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evidence received.
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evidence quality validated.
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missing evidence escalated.
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populations validated.
Access Control
Section titled “Access Control”-
user inventory current.
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MFA coverage complete.
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access reviews completed.
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termination testing completed.
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privileged access current.
Vulnerability Management
Section titled “Vulnerability Management”-
scan coverage complete.
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ASV results current.
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critical findings within SLA.
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unsupported systems addressed.
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retesting completed.
Logging
Section titled “Logging”-
CDE logging coverage complete.
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log reviews current.
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retention meets requirements.
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time synchronization validated.
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critical events monitored.
Secure Development
Section titled “Secure Development”-
SDLC controls operating.
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code review evidence available.
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application security testing current.
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production changes approved.
Penetration Testing
Section titled “Penetration Testing”-
penetration test current.
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segmentation test current.
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critical findings remediated.
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retesting completed.
Third Parties
Section titled “Third Parties”-
critical provider AOCs current.
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responsibilities documented.
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provider exceptions resolved.
Governance
Section titled “Governance”-
policies current.
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training current.
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roles documented.
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incident response current.
-
PCI risk assessments current.
103. Assessment Finding Dashboard
Section titled “103. Assessment Finding Dashboard”Track:
Open Critical
Open High
Open Medium
Open Low
Past Due
Retest Pending104. Assessment KRI
Section titled “104. Assessment KRI”Example:
High PCI findingsremaining openat assessment startTarget:
0105. Evidence KRI
Section titled “105. Evidence KRI”Example:
Applicable PCI controlswithout accepted evidence106. Scope KRI
Section titled “106. Scope KRI”Example:
Unknown systemswith CDE connectivity107. Provider KRI
Section titled “107. Provider KRI”Example:
Critical payment providerswithout current PCI assurance108. Practical Activity — Build Assessment Plan
Section titled “108. Practical Activity — Build Assessment Plan”Use fictional organization:
CloudShopTarget assessment:
PCI DSS v4.xEnvironment:
E-Commerce
Cloud
Payment Processor
Tokenization
KubernetesDefine:
Scope
Owners
Timeline
Assessment Method109. Practical Activity — Build Applicability Matrix
Section titled “109. Practical Activity — Build Applicability Matrix”Review requirement areas:
01 Network Security
02 Secure Configuration
03 Stored Account Data
04 Transmission
05 Malware Protection
06 Secure Development
07 Access Control
08 Authentication
09 Physical Security
10 Logging
11 Security Testing
12 GovernanceFor each determine:
Applicable?
Owner?
Evidence?110. Practical Activity — Build Evidence Request List
Section titled “110. Practical Activity — Build Evidence Request List”Create at least 30 requests across:
Network
IAM
Vulnerability
Logging
Development
Testing
Governance111. Practical Activity — Access Control Testing
Section titled “111. Practical Activity — Access Control Testing”Population:
70 CDE UsersSample:
25Results:
23 Pass
1 Missing Approval
1 Missing MFADocument findings.
112. Practical Activity — Vulnerability Assessment
Section titled “112. Practical Activity — Vulnerability Assessment”Population:
40 Critical/High FindingsResults:
35 Closed Within SLA
3 Overdue
2 Approved ExceptionsDetermine:
Compliance Concern
Risk
Follow-Up113. Practical Activity — ASV Review
Section titled “113. Practical Activity — ASV Review”Expected:
4 Required Scan PeriodsEvidence:
Q1 Pass
Q2 Pass
Q3 Fail
No Passing Q3 Rescan
Q4 PassDocument the assessment issue.
114. Practical Activity — Logging Review
Section titled “114. Practical Activity — Logging Review”CDE systems:
50Sending logs:
48Retention:
Most:12 Months
2 Databases:60 DaysIdentify findings.
115. Practical Activity — Penetration Testing Review
Section titled “115. Practical Activity — Penetration Testing Review”Annual pen test exists.
But:
3 Critical Findingsresults:
2 Retested Closed
1 No RetestDetermine readiness.
116. Practical Activity — Segmentation Review
Section titled “116. Practical Activity — Segmentation Review”Corporate network is declared:
Out of PCI ScopeTesting shows:
Developer Subnet →Payment DatabaseDetermine:
Finding
Scope Impact
Immediate Action117. Practical Activity — Provider Assurance
Section titled “117. Practical Activity — Provider Assurance”Payment gateway AOC:
CurrentCloud provider AOC:
CurrentTokenization provider:
Expired 8 Months AgoDocument:
Third-Party Assurance Gap118. Practical Activity — Build Assessment Summary
Section titled “118. Practical Activity — Build Assessment Summary”Create an executive summary answering:
Is Scope Accurate?
Are Requirements Covered?
Are Controls Operating?
Are Evidence Gaps Present?
Are Material Findings Open?
Is Organization Ready?119. Example Assessment Conclusion
Section titled “119. Example Assessment Conclusion”Suppose CloudShop has:
Requirements Reviewed:100%
Evidence Complete:92%
High Findings:5
Critical Findings:1
Failed Segmentation:1
Missing ASV Passing Result:1Recommended conclusion:
NOT READYFOR FINAL PCI VALIDATIONuntil material gaps are remediated and retested.
120. Common PCI Assessment Mistakes
Section titled “120. Common PCI Assessment Mistakes”Mistake 1 — Start With Requirement Checklist
Section titled “Mistake 1 — Start With Requirement Checklist”Scope is never validated.
Mistake 2 — Policy Equals Compliance
Section titled “Mistake 2 — Policy Equals Compliance”No operational testing occurs.
Mistake 3 — Evidence Collected Only During Audit
Section titled “Mistake 3 — Evidence Collected Only During Audit”Historical control operation cannot be demonstrated.
Mistake 4 — Incomplete Populations
Section titled “Mistake 4 — Incomplete Populations”Samples become unreliable.
Mistake 5 — “Not Applicable” Used Without Rationale
Section titled “Mistake 5 — “Not Applicable” Used Without Rationale”Requirements are avoided rather than assessed.
Mistake 6 — Third Parties Ignored
Section titled “Mistake 6 — Third Parties Ignored”Shared responsibility is incomplete.
Mistake 7 — Failed ASV Scan Accepted
Section titled “Mistake 7 — Failed ASV Scan Accepted”No passing rescan exists.
Mistake 8 — Pen Test Exists but Findings Remain Open
Section titled “Mistake 8 — Pen Test Exists but Findings Remain Open”Testing becomes a documentation exercise.
Mistake 9 — Segmentation Failure Ignored
Section titled “Mistake 9 — Segmentation Failure Ignored”PCI scope remains incorrect.
Mistake 10 — Findings Closed Without Retest
Section titled “Mistake 10 — Findings Closed Without Retest”Remediation is assumed.
121. Weak PCI Assessment Model
Section titled “121. Weak PCI Assessment Model”PCI Checklist ↓Yes / No ↓Submit122. Strong PCI Assessment Model
Section titled “122. Strong PCI Assessment Model”Scope ↓Requirement Applicability ↓Enterprise Controls ↓Evidence ↓Population ↓Testing ↓Technical Validation ↓Findings ↓Root Cause ↓Remediation ↓Retesting ↓Formal Validation123. GRC Analyst Responsibilities
Section titled “123. GRC Analyst Responsibilities”A GRC professional supporting a PCI assessment may:
-
Coordinate the PCI assessment plan.
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validate scope.
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maintain requirement applicability.
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maintain PCI control mappings.
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assign evidence owners.
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coordinate evidence requests.
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validate evidence quality.
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coordinate walkthroughs.
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build populations.
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support sample testing.
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track assessment findings.
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perform root-cause coordination.
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maintain remediation trackers.
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coordinate retesting.
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review third-party assurance.
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maintain readiness dashboards.
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coordinate assessor requests.
-
support final assessment documentation.
GRC connects:
Executive Management
Payment Teams
Security
IAM
Network
Cloud
Engineering
DevOps
SOC
Third Parties
Internal Audit
QSA / Assessors124. PCI Assessment Maturity Model
Section titled “124. PCI Assessment Maturity Model”Level 1 — Audit Driven
Section titled “Level 1 — Audit Driven”Assessment Starts ↓Evidence Collection StartsLevel 2 — Prepared
Section titled “Level 2 — Prepared”Scope
Controls
Evidence RepositoryLevel 3 — Managed
Section titled “Level 3 — Managed”Testing
Findings
Remediation
RetestingLevel 4 — Continuous Readiness
Section titled “Level 4 — Continuous Readiness”Evidence Automation
Control Monitoring
Scope Change ManagementLevel 5 — Continuous Assurance
Section titled “Level 5 — Continuous Assurance”Real-Time Control Validation
Dynamic Scope
Automated Evidence
Continuous Risk Assessment125. PCI Assessment Mindset
Section titled “125. PCI Assessment Mindset”For every PCI requirement ask:
Does it apply?
What control satisfies it?
Who owns that control?
How does it operate?
How often?
What population exists?
What evidence proves operation?
Can we independently test it?
Are there exceptions?
Why did those exceptions occur?
Were they remediated?
Was remediation retested?For every:
Not Applicableask:
What evidence provesit truly does not apply?For every:
Compliantask:
What evidence and testingsupport that conclusion?That is the mindset of a professional PCI assessment.
Key Takeaways
Section titled “Key Takeaways”-
PCI assessment begins with accurate scope.
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Requirement applicability should be documented and defensible.
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Controls should map clearly to applicable PCI requirements.
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Evidence should be authoritative, complete, current, and traceable.
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Walkthroughs help validate how controls actually operate.
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Control populations should be complete before sampling.
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Assessment methods may include examination, observation, interview, and testing.
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Findings can arise from design, implementation, operation, evidence, scope, technology, or third parties.
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Correction and corrective action are different.
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Findings should be remediated and retested before closure.
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Compensating controls and Customized Approaches require documented rigor.
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Third-party assurance must be reviewed in the context of shared responsibilities.
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Readiness should be determined before formal PCI validation begins.
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GRC coordinates scope, controls, evidence, assessment activities, findings, remediation, and assessor interaction.
Knowledge Check
Section titled “Knowledge Check”Before continuing, make sure you can answer:
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What is the purpose of a PCI assessment?
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Why must scope be validated before testing?
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What is an SAQ?
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What is a ROC?
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What is an AOC?
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What is the role of a QSA?
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What is a Requirement Applicability Matrix?
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What is the Defined Approach?
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What is the Customized Approach?
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Why should evidence be authoritative?
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What is a control walkthrough?
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What is a control population?
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Why must populations be complete?
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What assessment methods can be used?
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What is a design gap?
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What is an operating gap?
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What is an evidence gap?
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Why should findings undergo root-cause analysis?
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Why should remediation be retested?
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What role does GRC play in PCI assessment?
What’s Next?
Section titled “What’s Next?”➡️ Next: 11 — PCI Certification Process
In the final lesson of the PCI DSS module, you will move from assessment execution into the formal validation, attestation, reporting, submission, and ongoing compliance lifecycle.
You will work through:
Assessment Complete ↓Requirement Status ↓Remediation Closure ↓ROC / SAQ ↓AOC ↓Internal Approval ↓Submission ↓Acquirer / Payment Brand Requirements ↓Compliance Validation ↓Ongoing PCI MaintenanceYou will also build practical artifacts including a PCI Certification & Validation Plan, Assessment Deliverables Register, ROC/SAQ Readiness Checklist, AOC Review Checklist, Compliance Submission Tracker, Outstanding Conditions Register, Annual PCI Compliance Calendar, and Continuous Compliance Dashboard.