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Which data destruction technique involves encrypting the data, followed by encrypting the resulting keys with a different engine, and then destroying the keys resulting from the second encryption round?
Correct Answer: D
Cryptographic erasure is a secure data sanitization technique that relies on encryption. The process involves encrypting the data, encrypting the keys with a second layer, and then destroying the encryption keys. Without the keys, the encrypted data becomes unreadable and is effectively destroyed, even though the storage media remains intact. One-way hashing is used for password storage, not full data destruction. Degaussing is for magnetic media, and overwriting involves physically writing new data over existing sectors. Cryptographic erasure is widely used in cloud environments where physical media cannot be easily destroyed or reclaimed by customers. It ensures compliance with data retention and privacy regulations while maintaining environmental sustainability by allowing reuse of storage hardware.