- A
To be the trust anchor for the entire PKI hierarchy
The root CA's certificate is the trust anchor; all other certificates are validated against it.
- B
To issue certificates directly to end users
Why wrong: In a hierarchical PKI, the root CA typically delegates issuance to subordinate CAs.
- C
To generate private keys for all users
Why wrong: Private keys are generated by users or HSMs; the CA does not generate them for users.
- D
To revoke certificates and publish CRLs
Why wrong: Revocation can be performed by any CA, but the root CA's primary role is being the trust anchor.
Question 423 of 1,000
SSCP Cryptography Practice Question
This SSCP practice question tests your understanding of cryptography. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
In a PKI, what is the role of the root Certificate Authority (CA)?
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
✓
To be the trust anchor for the entire PKI hierarchy
The root Certificate Authority (CA) is the trust anchor in a Public Key Infrastructure (PKI) hierarchy. Its self-signed root certificate is the ultimate trust point from which all subordinate CA certificates and end-entity certificates derive their trust. Without a trusted root, the entire chain of trust collapses, as no certificate can be validated back to a trusted source.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
To be the trust anchor for the entire PKI hierarchy
Why this is correct
The root CA's certificate is the trust anchor; all other certificates are validated against it.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
To issue certificates directly to end users
Why it's wrong here
In a hierarchical PKI, the root CA typically delegates issuance to subordinate CAs.
- ✗
To generate private keys for all users
Why it's wrong here
Private keys are generated by users or HSMs; the CA does not generate them for users.
- ✗
To revoke certificates and publish CRLs
Why it's wrong here
Revocation can be performed by any CA, but the root CA's primary role is being the trust anchor.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume the root CA directly issues end-user certificates or handles revocation, but the SSCP exam tests the understanding that the root CA's primary role is to serve as the immutable trust anchor, with operational tasks delegated to subordinate CAs.
Detailed technical explanation
How to think about this question
The root CA's self-signed certificate uses a subject and issuer that are identical, and its private key is kept offline (often in a Hardware Security Module) to prevent compromise. In a multi-tier PKI, the root CA signs only the certificates of intermediate CAs, which then issue end-entity certificates. This design follows RFC 5280 and allows the root to remain offline, minimizing attack surface while maintaining trust chain integrity.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this SSCP question test?
Cryptography — This question tests Cryptography — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: To be the trust anchor for the entire PKI hierarchy — The root Certificate Authority (CA) is the trust anchor in a Public Key Infrastructure (PKI) hierarchy. Its self-signed root certificate is the ultimate trust point from which all subordinate CA certificates and end-entity certificates derive their trust. Without a trusted root, the entire chain of trust collapses, as no certificate can be validated back to a trusted source.
What should I do if I get this SSCP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jul 4, 2026
This SSCP practice question is part of Courseiva's free ISC2 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SSCP exam.
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