ISC2 Certified Cloud Security Professional (CCSP) Practice Question
A SaaS provider must prove to customers and regulators that every administrative change to production data in its multi-region cloud database is fully traceable to an individual and that related audit logs cannot be altered or deleted-even by root users-for at least one year. The provider already captures detailed API audit events and writes them to a dedicated object-storage bucket. Which additional control BEST enhances accountability and preserves the evidentiary quality of these logs?
Forward all audit events to a centralized SIEM for real-time correlation and alerting.
Enable WORM object lock on the audit-log bucket in Compliance mode with a one-year retention period.
Encrypt the audit logs with a customer-managed key that is rotated every 30 days.
Extend the bucket's lifecycle retention rule from 90 to 180 days without locking the policy.
Placing the bucket under a write-once-read-many (WORM) object-lock configuration in Compliance mode with a one-year retention period makes each log object immutable for that duration. In Compliance mode, S3 blocks all users-including the root account-from modifying or deleting the object until the retention period expires, thereby supporting chain-of-custody and non-repudiation requirements. Simply increasing an unlocked retention policy, forwarding logs to a SIEM, or encrypting with frequently rotated keys does not, by themselves, stop privileged users from deleting or altering the data.
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ISC2 Certified Cloud Security Professional (CCSP)
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