Researcher have used the principles that underpin the whispering-gallery effect to create an unbeatable anti-counterfeiting system. The researchers' system is a microchip consisting of two-step authentication. Step 1 is the visible pattern on the chip. Step 2 is the non-forgeable color fingerprint of the chip. These microchips will be useful for high-security authentication.
from Latest Science News -- ScienceDaily https://ift.tt/2LWCHFT
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