Which media sanitization technique protects the confidentiality of information against laboratory attacks?

Purging is a media sanitization technique that specifically addresses the need to protect the confidentiality of information against laboratory attacks. This process involves more advanced measures than simply clearing data, ensuring that residual data cannot be easily recovered through forensic recovery methods. Purging typically uses methods such as overwriting data multiple times or employing cryptographic techniques to sanitize the storage media, making it significantly more challenging for attackers, particularly those with sophisticated laboratory capabilities, to retrieve any remnants of the original information.

In contrast, while clearing may remove data to a degree, it does not provide the same level of assurance against retrieval methods that can be employed in controlled environments. Destruction entirely renders the media unusable, but it does not specifically focus on protecting data confidentiality within the context of laboratory attacks. Cleaning might refer to processes that help maintain system hygiene but lacks the context of thorough data sanitization or ensuring confidentiality.