Google Professional-Cloud-Security-Engineer Dumps

To provide temporary write access to a Cloud Storage bucket with the minimum permissions necessary, you should:

Identify the Compute Engine instance’s default service account: Each Compute Engine instance has a default service account that is used to interact with other Google Cloud services.

Assign the storage.objectCreator role: This predefined IAM role grants permissions to create objects in a Cloud Storage bucket, which is sufficient for temporary write access. It does not grant permissions to read or delete objects, thus adhering to the principle of least privilege.

Avoid using full permissions or long-lived keys: Options A and C suggest using broader permissions than necessary or embedding long-lived keys, which could pose a security risk if compromised.

Service account impersonation (Option D) is not necessary for this task and would be more appropriate for scenarios where you need to assume a different identity with different permissions.

References:

Google Cloud documentation on IAM roles for Cloud Storage, which lists the storage.objectCreator role as providing permissions to create objects without granting full administrative access to the bucket1.

Best practices for access control in Cloud Storage recommend using the least privilege necessary and avoiding the use of long-lived service account keys2.

Firewall Rule Analysis: Analyze the existing VPC firewall rules to identify any rules that might allow traffic between VM instances based on the same service account.

Priority Check: Check the priority of these rules. A rule with a priority lower than 1000 (such as 999) will take precedence over your tag-based rules.

Service Account Configuration: Since your VM instances are deployed without any service account customization, they are likely using the default service account. A firewall rule allowing traffic between instances using this default service account will override the tag-based rules if it has a higher priority.

Testing and Validation: Disable or adjust the priority of the rule with priority 999 to test if the tag-based segmentation works correctly. Validate that the traffic is segmented according to your intended configuration. References:

Google Cloud - VPC Firewall Rules

Google Cloud - Service Accounts

https://cloud.google.com/kms/docs/ekm#how_it_works

- First, you create or use an existing key in a supported external key management partner system. This key has a unique URI or key path.

- Next, you grant your Google Cloud project access to use the key, in the external key management partner system.

- In your Google Cloud project, you create a Cloud EKM key, using the URI or key path for the externally-managed key.