Which sanitization method is required to securely dispose of magnetic hard drives containing classified data when the drives will leave a controlled facility?
A CISSP practice question covering Domain 2: Asset Security. Try answering before reading the explanation below.
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Why "Degaussing followed by physical destruction" is the right answer
For classified media leaving custody, standards (NIST SP 800-88 'Purge'/'Destroy') require degaussing plus physical destruction. Overwrite is acceptable for unclassified data. Crypto-erase works only if encryption was applied from day one with strong key management.
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