CompTIA CySA+ Study Library
CS0-004
13 free articles on the concepts the CS0-004 exam tests, grouped by exam domain. Each one backs real questions in our practice exam.
Reporting and Communication
- Cardholder Data Breach Notification: Who a Merchant Must Tell Under PCI DSS Who a merchant must notify after a cardholder data breach under PCI DSS — acquiring bank, card brands, and PFI rules — versus state breach laws.
- Vulnerability Compliance Reports for PCI DSS: CDE Scope, Audiences, and Remediation Plans How PCI DSS compliance reports differ from technical vulnerability reports — CDE scoping, acquirer evidence, and remediation plans that satisfy auditors.
Security Operations
- CompTIA CySA+ (CS0-003) Study Guide: Format, Domains, Cost, and How to Pass Everything about CompTIA CySA+ CS0-003: 85 questions, 165 minutes, 750 passing score, $439 voucher, domain weights, and the retirement deadline.
- Dark Web and HUMINT Collection: Stealth, Source Risk, and Legal Guardrails How CTI teams collect from dark web forums and human sources — deception risk, legal authorization, passive vs active stealth — for CS0-003.
- Rating Threat Intelligence: Timeliness, Relevancy, Accuracy, and the Admiralty System How SOC analysts grade threat intel using timeliness, relevancy, accuracy, and Admiralty ratings like B2 — with corroboration rules CS0-003 tests.
- The Threat Intelligence Lifecycle: Dissemination, Detections, and Tasking Threat Hunts Learn the six phases of the threat intelligence lifecycle, how the SOC turns bulletins into detections, and how intel tasks threat hunts.
- Threat Data Enrichment and SOAR Orchestration: Aggregating, Deduplicating, and Resolving Feed Conflicts How SOAR workflows enrich alerts with threat intel — aggregation, dedup, feed conflict handling, and rate-limit-aware design for CS0-003.
- Threat Intelligence Sources: OSINT, Closed-Source Feeds, ISACs, and Internal Telemetry OSINT vs closed-source feeds, ISAC sharing communities, and internal telemetry — the four threat intel source types CS0-003 expects you to compare.
- Tokenization and PAN Exposure in Logs: Protecting Cardholder Data Where Analysts Find It Tokenization vs masking vs encryption for payment card data, and why full PANs in debug logs are a serious PCI DSS storage violation.
- Unintentional Insider Threats and DLP: Catching Data Walking Out the Door How unintentional insider threats differ from malicious ones, and how DLP content inspection catches PII and card data leaving by email.
Vulnerability Management
- PCI DSS ASV Scans: Quarterly External Scanning, Failing Results, and Rescans What PCI DSS ASV scans are, why they run quarterly against internet-facing systems, what makes a scan fail, and how rescans restore compliance.
- PCI DSS Compensating Controls: What You Must Demonstrate and How the AOC Reflects It What a PCI DSS compensating control must demonstrate — meeting intent and rigor, going beyond other requirements — and how the AOC records it.
- Reading Vulnerability Scan Results: False Positives, False Negatives, and Risk-Based Prioritization Master true/false positives and negatives in vulnerability scanning, plus why data sensitivity and compliance scope outrank raw CVSS scores.
Reading is step one — practicing is what passes the exam.
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