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ISC2 Systems Security Certified Practitioner (SSCP) Practice Question

Your security team needs cryptographic assurance that 100 GB database backup files copied nightly from on-premises storage to an Amazon S3 bucket have not been altered in transit or while stored. They must also be able to programmatically re-verify each object's integrity before a restore operation without decrypting the data. Which approach provides this capability with the least operational overhead?

  • Maintain an external manifest of object names and sizes in the AWS Glue Data Catalog and compare the manifest before every restore.

  • Enable server-side encryption with customer-provided keys (SSE-C) so that S3 validates the MD5 digest of the encryption key during both upload and download operations.

  • Use AWS Backup to copy the S3 bucket to another Region with Object Lock enabled, relying on immutability to guarantee integrity of the backup data.

  • Have the backup workflow calculate a SHA-256 checksum for each file and include it in the x-amz-checksum-sha256 header (or set ChecksumAlgorithm=SHA-256) when uploading, allowing Amazon S3 to verify the checksum on upload, store it as metadata, and return it in response headers for client-side integrity re-checks.

ISC2 Systems Security Certified Practitioner (SSCP)
Cryptography
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