Certified in Risk and Information Systems Control (CRISC) — Question 958

Which of the following is the BEST way to ensure data is properly sanitized while in cloud storage?

Answer options

• A. Cryptographically scrambling the data
• B. Formatting the cloud storage at the block level
• C. Deleting the data from the file system
• D. Degaussing the cloud storage media

Correct answer: A

Explanation

Cryptographically scrambling the data (A) ensures that even if the data is accessed, it cannot be read without the proper decryption key, making it the best method for sanitization. Formatting the storage (B) and deleting files (C) may not fully erase data, leaving it potentially recoverable. Degaussing (D) is effective for magnetic media but not applicable to all types of cloud storage, which often uses solid-state drives.