- A
Purpose: ASYMMETRIC_SIGN with algorithm: RSA_SIGN_PKCS1_2048_SHA256
This key type is designed for signing and uses Cloud HSM which provides non-exportable keys.
- B
Purpose: SYMMETRIC_ENCRYPT_DECRYPT with algorithm: GOOGLE_SYMMETRIC_ENCRYPTION
Why wrong: Symmetric keys are for encrypt/decrypt, not signing.
- C
Purpose: ASYMMETRIC_DECRYPT with algorithm: RSA_DECRYPT_OAEP_2048_SHA256
Why wrong: Asymmetric decrypt keys are for decryption, not signing.
- D
Purpose: MAC with algorithm: HMAC_SHA256
Why wrong: MAC keys are for message authentication, not for signing transactions.
Question 664 of 1,000
mediumMultiple ChoiceObjective-mapped
PCSE Practice Question: A financial institution uses Cloud HSM to protect…
This PCSE practice question tests your understanding of pcse exam topics. 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.
A financial institution uses Cloud HSM to protect cryptographic keys used for signing sensitive transactions. They want to ensure that keys are never exportable and that key usage is logged. Which key type should they create in Cloud HSM?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"never"Why it matters: Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
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
✓
Purpose: ASYMMETRIC_SIGN with algorithm: RSA_SIGN_PKCS1_2048_SHA256
Option A is correct because Cloud HSM supports ASYMMETRIC_SIGN key purpose with RSA_SIGN_PKCS1_2048_SHA256, which creates a non-exportable key pair used for signing. Cloud HSM ensures the private key never leaves the HSM boundary, and all key usage is automatically logged via Cloud Audit Logs, meeting the requirements for non-exportability and logging.
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.
- ✓
Purpose: ASYMMETRIC_SIGN with algorithm: RSA_SIGN_PKCS1_2048_SHA256
Why this is correct
This key type is designed for signing and uses Cloud HSM which provides non-exportable keys.
Clue confirmation
The clue word "never" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Purpose: SYMMETRIC_ENCRYPT_DECRYPT with algorithm: GOOGLE_SYMMETRIC_ENCRYPTION
Why it's wrong here
Symmetric keys are for encrypt/decrypt, not signing.
- ✗
Purpose: ASYMMETRIC_DECRYPT with algorithm: RSA_DECRYPT_OAEP_2048_SHA256
Why it's wrong here
Asymmetric decrypt keys are for decryption, not signing.
- ✗
Purpose: MAC with algorithm: HMAC_SHA256
Why it's wrong here
MAC keys are for message authentication, not for signing transactions.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the distinction between key purposes: candidates confuse ASYMMETRIC_DECRYPT (used for decrypting ciphertext) with signing, but signing requires the private key to produce a signature, not to decrypt data.
Detailed technical explanation
How to think about this question
Cloud HSM uses FIPS 140-2 Level 3 validated hardware to protect keys; when you create an ASYMMETRIC_SIGN key, the private key is generated inside the HSM and never exposed to the client. The signing operation is performed via the Cloud KMS API, which calls the HSM to produce the signature, and every operation is logged in Cloud Audit Logs with the key version and principal. In contrast, symmetric keys like GOOGLE_SYMMETRIC_ENCRYPTION are wrapped and can be exported under certain conditions, violating the 'never exportable' requirement.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Quick reference
Symmetric Encryption Algorithm Comparison
| Algorithm | Key Size | Block Size | Status | Notes |
|---|---|---|---|---|
| AES-128 | 128-bit | 128-bit | Current standard | NIST approved; WPA3, TLS |
| AES-256 | 256-bit | 128-bit | Current standard | Preferred for sensitive / govt data |
| 3DES | 112-bit effective | 64-bit | Deprecated (2023) | Replaced by AES |
| DES | 56-bit | 64-bit | Broken | Cracked in < 24 h; never deploy |
| ChaCha20 | 256-bit | Stream cipher | Current | TLS 1.3, WireGuard |
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 PCSE question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Purpose: ASYMMETRIC_SIGN with algorithm: RSA_SIGN_PKCS1_2048_SHA256 — Option A is correct because Cloud HSM supports ASYMMETRIC_SIGN key purpose with RSA_SIGN_PKCS1_2048_SHA256, which creates a non-exportable key pair used for signing. Cloud HSM ensures the private key never leaves the HSM boundary, and all key usage is automatically logged via Cloud Audit Logs, meeting the requirements for non-exportability and logging.
What should I do if I get this PCSE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "never". Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 30, 2026
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