Purging is a data destruction technique designed to protect the sensitivity of information against laboratory attacks. In such attacks, unauthorized individuals may use advanced signal processing recovery tools to recover previously stored information. Purging involves removing the stored data in a way that it cannot be reconstructed by any means, including laboratory techniques. This process often includes degaussing, which demagnetizes the magnetic field of storage media, thereby making data recovery virtually impossible.
References: The information provided aligns with the Certified Network Defender (CND) course's objectives regarding data destruction and protection against laboratory attacks. For more detailed information, please refer to the official CND study guide and documents.