Crucial Exams

ISC2 Certified Cloud Security Professional (CCSP) Practice Question

Your company stores terabytes of customer backups in a cloud object store using an envelope encryption scheme: each object is encrypted with a unique data encryption key (DEK) that is wrapped by a customer-managed key-encrypting key (KEK) in the provider's KMS. Compliance now mandates annual key rotation, but downtime and large-scale data re-encryption must be avoided. Which approach best satisfies these constraints?

  • Export the current KEK, delete it from the KMS, and import a new KEK containing identical key material.

  • Generate a new KEK annually, unwrap each stored DEK, then wrap it with the new KEK while leaving the ciphertext untouched.

  • Extend the existing KEK's expiration date in the KMS so that re-encryption is unnecessary.

  • Create fresh DEKs for every object and re-encrypt all backups, keeping the original KEK in use.

ISC2 Certified Cloud Security Professional (CCSP)
Cloud Data Security
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