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CAS-004 Practice Question: A security architect is designing a system for a…
A security architect is designing a system for a healthcare provider that must comply with HIPAA. Which control is required for ePHI transmission?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Encryption of data in transit
HIPAA requires encryption for ePHI in transit. Option B (integrity verification mechanisms) is wrong because integrity controls, while important, are not the specific requirement for transmission encryption. Option C (role-based access control) is wrong because access controls are required for data at rest and access, but not specifically for transmission. Option D (audit logging for all access) is wrong because audit logs are required for monitoring but not a transmission-specific requirement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Encryption of data in transit
Why this is correct
Encryption of data in transit is required by HIPAA to protect ePHI during transmission.
- ✗
Integrity verification mechanisms
Why it's wrong here
Integrity verification mechanisms are important for ensuring data has not been altered, but HIPAA specifically requires encryption for transmission.
- ✗
Role-based access control
Why it's wrong here
Role-based access control governs access to data at rest, not a specific requirement for transmission of ePHI.
- ✗
Audit logging for all access
Why it's wrong here
Audit logging tracks access and activities, but is not the specific transmission control required by HIPAA.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
Go deeper
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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