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As the Internet Archive shows, there is great value in preserving digital information for posterity. But sometimes, there is greater value in destroying information and doing so quickly. Information Week recounts the 2001 incident when an American spy plane was forced to land in Chinese territory after the plane collided with a Chinese fighter jet. The article notes that the U.S. crew was unable to erase the hard drives in time to protect the security of sensitive information. “Since then,” the article states, “researchers have been looking for a way to quickly erase computer hard drives to deny access to sensitive intelligence data.”

According to the article, researchers have developed an effective technique to erase hard drives in minutes rather than hours:

The researchers concluded that permanent magnets are the best solution. Other methods, including burning disks with heat-generating thermite, crushing drives in presses, chemically destroying the media or frying them with microwaves all proved susceptible to sensitive, patient, recovery efforts.

The military need for such technology is obvious and is a simple no-brainer. But additionally interesting are the potential commercial and consumer applications of such technology. According to the article, the researchers claimed the magnetic eraser could be used to quickly erase VHS tapes, floppy drives, data cassettes and hard drives. Maybe someday soon, it will be unacceptable and even illegal for corporations and government agencies to keep sensitive information — like your social security number — on easily stolen laptops, unless those machines are equipped an effective auto-erasure mechanism.