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?

Rationale

Cryptographic erasure 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.

This technique ensures that the original data cannot be recovered by securely managing the encryption keys, making it a robust method for data destruction.

A (One-way hashing) YOUR ANSWER

One-way hashing transforms data into a fixed-length hash value, which cannot be reversed to retrieve the original data. While it provides data integrity and is useful for verifying authenticity, it does not involve key management or the destruction of keys, as no keys are generated or used in this process.

B (Cryptographic erasure) CORRECT

This is the correct answer as it specifically describes the process of encrypting data, then encrypting the keys with a different engine, and finally destroying those keys. This ensures that the original data is rendered irretrievable, fulfilling the criteria outlined in the question.

C (Overwriting) YOUR ANSWER

Overwriting involves replacing existing data with new data, which can effectively erase the original content but does not involve encryption or key management. This method may not guarantee complete data destruction, especially if advanced recovery techniques are employed.

D (Degaussing) YOUR ANSWER

Degaussing uses a strong magnetic field to disrupt the magnetic domains of storage media, effectively erasing all data. While effective for magnetic storage devices, it does not involve encryption or the management of keys and is not applicable to solid-state drives or other non-magnetic media.

Conclusion

Cryptographic erasure stands out as the only technique that combines data encryption with a systematic approach to key management and destruction. This method ensures that both the data and its access keys are rendered unreadable, providing a high level of security and compliance with data protection standards. Other techniques, while useful in certain scenarios, do not meet the specific criteria necessary for effective data destruction as outlined in the question.

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?

Cryptographic erasure 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.

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