Who is CompTIA CASP+ designed for?
CompTIA CASP+ (Advanced Security Practitioner) is designed for experienced security professionals who want to validate advanced-level technical skills without moving into management. The CAS-004 exam covers security architecture, operations, engineering, cryptography, and governance at an expert practitioner level. It requires 10+ years of IT experience with 5 years in security administration and costs $512 USD.
The CompTIA CASP+ CAS-004 (CompTIA Advanced Security Practitioner) is CompTIA's expert-level security certification, representing the highest level in CompTIA's security certification path. Unlike CISSP, which is management-focused, CASP+ validates technical mastery and hands-on security architecture and engineering skills.
CASP+ is approved by the U.S. DoD for IAT Level III, IAM Level II/III, and CSSP roles, making it one of the most valuable certifications for senior government security positions. The exam costs $512 USD, contains a maximum of 90 questions, and does not have a numeric passing score -- CompTIA uses a pass/fail determination.
Exam Overview
| Detail | Information |
|---|---|
| Exam Code | CAS-004 |
| Full Name | CompTIA Advanced Security Practitioner+ |
| Number of Questions | Maximum 90 |
| Time Limit | 165 minutes |
| Passing Score | Pass/Fail (no numeric score) |
| Cost | $512 USD |
| Prerequisites | CASP+ requires 10 years IT experience, 5 years security |
| DoD Approval | IAT Level III, IAM Level II/III, CSSP Analyst/Infrastructure |
| Validity | 3 years |
The exam covers four domains:
- Security architecture (29%)
- Security operations (30%)
- Security engineering and cryptography (26%)
- Governance, risk, and compliance (15%)
"CASP+ represents the transition from 'I understand security' to 'I design and build security systems.' The exam scenarios are enterprise-scale -- mergers and acquisitions, multi-cloud architecture, zero trust implementation for 50,000 users. Candidates who approach it with the mindset of a practitioner who has actually built these systems will do significantly better than those approaching it as a test." -- CASP+ certified practitioner community
Domain 1: Security Architecture (29%)
Enterprise Security Design
At the CASP+ level, security architecture involves designing security controls for complex enterprise scenarios:
Network architecture security:
- Zero trust network architecture (ZTNA): Designing policy enforcement points, identity verification, device trust verification, and least-privilege microsegmentation at enterprise scale
- Software-defined networking security (SDN): Security implications of centralized control plane, securing the SDN controller, and securing north-south and east-west traffic
- SASE (Secure Access Service Edge): Converging network and security functions in a cloud-delivered service for distributed enterprises
Cloud architecture security:
- Multi-cloud security architecture (AWS + Azure + GCP simultaneously)
- Container security: Image scanning, runtime security, secrets management in Kubernetes
- Serverless security: Function-level IAM, dependency vulnerabilities, event injection attacks
Mergers, Acquisitions, and Divestitures
CASP+ specifically tests enterprise integration security:
- Identity federation across newly combined organizations
- Network interconnection security during M&A
- Data classification and data governance integration
- Regulatory compliance across different jurisdictions after acquisition
Domain 2: Security Operations (30%)
Advanced Threat Detection and Response
Threat intelligence operationalization:
- Converting strategic intelligence (threat actor profiles) into tactical detection rules
- STIX/TAXII: Standards for sharing threat intelligence in machine-readable format
- Diamond Model of Intrusion Analysis: Analyzing adversary, capability, infrastructure, and victim relationships
Advanced incident response:
- Malware analysis: Static analysis (examining file without executing: strings, PE headers, imports) vs. dynamic analysis (executing in isolated sandbox and observing behavior)
- Memory forensics: Using Volatility Framework to analyze memory dumps for process injection, rootkits, and encryption keys
- Threat hunting at scale: Query hunting across petabytes of log data using big data platforms
Security Orchestration, Automation, and Response (SOAR)
SOAR platforms automate repetitive incident response tasks:
- Playbook automation: Automated response to common alert types
- Case management: Tracking incidents from detection to closure
- Integration: Connecting SIEM, ticketing, threat intelligence, and response tools
- Metrics: Measuring automation effectiveness and analyst productivity
Domain 3: Security Engineering and Cryptography (26%)
Advanced Cryptography
Post-quantum cryptography: NIST has standardized the first post-quantum cryptographic algorithms (CRYSTALS-Kyber for key encapsulation, CRYSTALS-Dilithium for digital signatures) to protect against future quantum computer attacks on RSA and ECC.
PKI design: Enterprise PKI architecture including:
- Root CA (offline, air-gapped) and subordinate CAs
- Certificate lifecycle management (issuance, renewal, revocation)
- OCSP and CRL distribution points for revocation checking
- Hardware Security Modules (HSM) for key protection
Cryptographic agility: Designing systems to allow algorithm replacement without major re-architecture, preparing for post-quantum transition.
Secure System Design
| Design Principle | Description |
|---|---|
| Secure by default | Systems shipped with security enabled; no manual hardening required |
| Least privilege | Minimal permissions granted to each component and user |
| Defense in depth | Multiple layered controls; no single control provides complete protection |
| Fail secure | Systems default to a secure state when failures occur |
| Economy of mechanism | Simple designs are easier to verify and less likely to have vulnerabilities |
Software Security
- SAST (Static Application Security Testing): Analyzing source code for vulnerabilities before execution
- DAST (Dynamic Application Security Testing): Testing running applications for vulnerabilities from outside
- IAST (Interactive Application Security Testing): Instrumented testing from inside running application
- RASP (Runtime Application Self-Protection): In-application security that terminates sessions when attacks detected
- SCA (Software Composition Analysis): Scanning dependencies for known vulnerabilities
Domain 4: Governance, Risk, and Compliance (15%)
Risk Management Frameworks
NIST Risk Management Framework (RMF):
- Categorize: Classify systems by impact level
- Select: Choose appropriate security controls
- Implement: Deploy selected controls
- Assess: Evaluate control effectiveness
- Authorize: Accept risk for authorization to operate
- Monitor: Continuously monitor security posture
ISO 31000: International risk management standard providing principles and guidelines applicable to any organization.
Security Policy Architecture
CASP+ level policy architecture includes:
- Security policy hierarchy: Organizational policy > Functional policies > Standards > Procedures > Guidelines
- Policy exceptions: Formal risk acceptance process for documented exceptions
- Policy enforcement: Technical controls that enforce policy automatically vs. procedural controls requiring human action
| Policy Type | Description | Example |
|---|---|---|
| Acceptable Use Policy | Rules for appropriate use of IT resources | No personal email on company systems |
| Data Classification Policy | How to classify and handle data | PII must be encrypted at rest and in transit |
| Change Management Policy | How changes are approved and implemented | All changes require CAB approval |
| Incident Response Policy | How incidents are detected, reported, and handled | All breaches reported to CISO within 1 hour |
Frequently Asked Questions
How does CASP+ compare to CISSP? CASP+ is a technical practitioner credential validating hands-on security engineering and architecture skills. CISSP is a managerial credential validating security program management, risk management, and governance skills. CASP+ holders design and implement security controls; CISSP holders manage security programs and make risk decisions. Both are expert-level but target different career paths. Many senior security professionals pursue both.
Is CASP+ harder than Security+? CASP+ is significantly harder than Security+. The exam uses performance-based questions requiring candidates to analyze complex scenarios, make architecture decisions, and justify trade-offs across technical, operational, and governance dimensions. Security+ tests whether you understand security concepts; CASP+ tests whether you can apply them to design and defend complex enterprise security architectures.
What career roles benefit most from CASP+? CASP+ is most valuable for senior security engineers, security architects, and technical security leads in enterprise environments. It is particularly valuable for government and defense contractor positions that require DoD 8570 IAT Level III compliance. Security consultants and red team leaders also benefit from CASP+ as it demonstrates advanced technical credibility without the management focus of CISSP.
References
- CompTIA. (2025). CompTIA CASP+ CAS-004 Exam Objectives. https://www.comptia.org/certifications/casp
- Easttom, C. (2023). CompTIA Advanced Security Practitioner (CASP+) CAS-004 Study Guide. Sybex.
- NIST. (2020). NIST SP 800-37r2: Risk Management Framework. https://csrc.nist.gov/publications/detail/sp/800-37/rev-2/final
- NIST. (2024). Post-Quantum Cryptography Standards. https://www.nist.gov/programs-projects/post-quantum-cryptography
- CompTIA. (2025). DoD 8570/8140 CASP+ Approved Baselines. https://www.comptia.org/certifications/which-certification/dod-8570
- ISO. (2018). ISO 31000:2018 Risk Management Guidelines. https://www.iso.org/standard/65694.html