The answer is that three valid condition keys to restrict S3 bucket access in IAM policies are aws:SourceIp, aws:SourceVpc, and s3:x-amz-server-side-encryption. These keys work because IAM policies evaluate conditions at request time: aws:SourceIp limits access to specific client IP addresses, aws:SourceVpc restricts requests to those originating from a particular VPC, and s3:x-amz-server-side-encryption enforces that objects must be uploaded with a specific encryption header. On the AWS Certified Security Specialty SCS-C02 exam, this question tests your ability to distinguish between IAM policy condition keys and resource-based policy keys; a common trap is confusing aws:PrincipalOrgID (valid only in S3 bucket policies) with the IAM condition keys listed above. Remember the memory tip: "IAM conditions control the who, where, and how—SourceIp for location, SourceVpc for network, and encryption headers for data protection."
SCS-C02 Identity and Access Management Practice Question
This SCS-C02 practice question tests your understanding of identity and access management. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Which THREE are valid ways to restrict access to an S3 bucket using IAM policies? (Choose 3.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Requiring server-side encryption using the 's3:x-amz-server-side-encryption' condition key
Options B, C, and D are correct. B: You can use condition keys like 's3:x-amz-server-side-encryption' in an IAM policy. C: You can limit access to specific IP addresses using the 'aws:SourceIp' condition key. D: You can restrict access to specific VPCs using the 'aws:SourceVpc' condition key. Option A is wrong because IAM policies cannot use the 'aws:PrincipalOrgID' condition key to restrict access to an S3 bucket; that key is used in resource-based policies. Option E is wrong because restricting access to a specific bucket is done by specifying the bucket ARN in the Resource element, not by a condition key.
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.
✓
Requiring server-side encryption using the 's3:x-amz-server-side-encryption' condition key
Why this is correct
This can be done in IAM policies to enforce encryption.
Related concept
Read the scenario before looking for a memorised answer.
✗
Using the 'aws:PrincipalOrgID' condition key
Why it's wrong here
This key is for resource-based policies, not IAM identity-based policies.
✓
Restricting access to a specific VPC using the 'aws:SourceVpc' condition key
Why this is correct
This restricts access to requests from a specific VPC.
Related concept
Read the scenario before looking for a memorised answer.
✗
Using the 's3:ResourceAccount' condition key to restrict access to a specific bucket
Why it's wrong here
's3:ResourceAccount' is used to restrict access based on the account that owns the resource, not the bucket name.
✓
Limiting access to specific IP addresses using the 'aws:SourceIp' condition key
Why this is correct
This restricts access based on source IP.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which SCS-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Identity and Access Management — This question tests Identity and Access Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Requiring server-side encryption using the 's3:x-amz-server-side-encryption' condition key — Options B, C, and D are correct. B: You can use condition keys like 's3:x-amz-server-side-encryption' in an IAM policy. C: You can limit access to specific IP addresses using the 'aws:SourceIp' condition key. D: You can restrict access to specific VPCs using the 'aws:SourceVpc' condition key. Option A is wrong because IAM policies cannot use the 'aws:PrincipalOrgID' condition key to restrict access to an S3 bucket; that key is used in resource-based policies. Option E is wrong because restricting access to a specific bucket is done by specifying the bucket ARN in the Resource element, not by a condition key.
What should I do if I get this SCS-C02 question wrong?
Identify which SCS-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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