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PiMuNu [soylentnews.org] writes:

FTFA: [aps.org]

Researchers demonstrated a scheme that relies on quantum mechanics to prevent unauthorized access to restricted objects, such as nuclear materials.

The detection of unauthorized tampering—in stores of anything from sensitive documents to nuclear materials—is improved by exploiting the basic properties of quantum physics, according to a new study. Researchers demonstrated that optical monitoring systems, if made sensitive to quantum properties of light, could avoid vulnerabilities afflicting the best current tamper-detection systems. The new technique could soon find its way into practical use.

Original Submission