New self-wiping chips destroy data when devices try to hack

Chips that erase data on their own use a new material. They temporarily store energy,

changing the color of the emitted light. Data is self-erased in a matter of days, and the chip can also be erased upon request with a blue flash.

“It is very difficult to determine if thedevice. It can work fine, but it does more than it should by sending information to a third party, ”explains Parag Deotar, assistant professor of electrical engineering and computer science at the University of Michigan.

With self-destruct barcode printed onthe chip inside the device, the owner is prompted if the mechanism has been tampered with to secretly install the eavesdropping device. Or the barcode can be written and placed on integrated circuits or printed circuit boards. This will help prove that they were not opened or replaced during transport.

Self-erasing chips are built from a layera semiconductor three atoms thick on top of a thin film of azobenzenes-based molecules - the type of molecules that shrink in response to ultraviolet light. These, in turn, attract the semiconductor, causing it to emit light at a slightly longer wavelength.

The stretched azobenzene naturally losesstored energy for about seven days in the dark - a time that can be reduced by exposure to heat and light, or increased by storage in a cool, dark place. Anything written on the chip, be it an authentication barcode or a secret message, will disappear when the azobenzene stops stretching the semiconductor. Alternatively, it can be erased immediately using a flash of blue light. After erasing, the chip can write a new message or barcode.

The next steps in the research include increasing the amount of time the material can keep the information intact, which will help the new design fight counterfeiting.

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