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ISC2 Systems Security Certified Practitioner (SSCP) Practice Question

An incident response team stores nightly server images in an Amazon S3 bucket that is replicated to a second AWS Region. To satisfy compliance, the team must be able to prove that any replica is bit-for-bit identical to the original image even if the files are copied between buckets multiple times. Which approach BEST meets the requirement with the least operational overhead?

  • Digitally sign each image with the organization's private RSA key and validate the signature after every copy.

  • Calculate a CRC32 checksum for each file and re-check the CRC value in the destination bucket.

  • Encrypt each image with AES-256 in server-side encryption mode and verify that the resulting ciphertext matches after replication.

  • Generate and store a SHA-256 digest for each image when it is created, then recompute and compare the digest after every replication event.

ISC2 Systems Security Certified Practitioner (SSCP)
Cryptography
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