MIT Develops Tiny, Tamper-Proof Product Tag Using Terahertz Waves
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Researchers at MIT invented a tiny, tamper-proof ID tag that uses terahertz waves to authenticate products. It's cheaper and more secure than traditional RFID tags.
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The antitampering capability comes from mixing metal particles into the glue so terahertz waves can detect if the tag was peeled off and reattached.
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The tag is only 4 sq mm in size, making it usable on very small items. It also enables machine learning to detect tampering with over 99% accuracy.
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Limitations are the short read range of a few cm and the angle needing to be under 10 degrees between tag and sensor.
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Possible applications include supply chain authentication, medical devices, ID tags, and security. Terahertz has potential beyond wireless communications.