Simple quantum uncrackable security makes possible moves




Dutch researchers have developed technology to protect bank cards, credit cards, identity documents and digital door locks for example cars. Although the base is based on quantum mechanics, the technology is cheap and easy to deploy.

According to researchers from the MESA + -instituut of the University of Twente and the TU / e cards with their method impossible to crack and bypassing security at copying or imitating keys could not. Scientists have named their method Quantum Secure Authentication. In spite of the name is for the security only a layer of white paint in combination with a laser, image sensor, and imaging chip needed. The laser is for reading out information, similar to an optical drive and the imaging chip is used for projection, as a beamer.

The only to be protected is provided with a layer of white paint with millions of nanoparticles. “If you send in a light particle paint will, like a pinball between the nanoparticles’ by bouncing” to escape “, describes the University of Twente. The idea is that banks and other organizations to project a unique pattern of light particles passes, after a reading records the resulting pattern of escaping photons for authentication.

In theory, an attacker can mimic this question-answer method by analyzing the input dot pattern, but security researchers is that a pattern is used that consists of fewer photons than there are bright spots. This pattern which an attacker can never find enters the paint and the resulting output pattern can not be copied.

The method is based on one of the most famous experiments in physics: the two-slit experiment . Here, an interference pattern is produced when only a single photon passes through two slits at the same time. The light particle appears to interfere with itself and thus be on several places, which is the basis of quantum mechanics. “The bank may even single photon check all the answers,” concludes the University of Twente.

The research titled Quantum Secure Authentication of a Physical Unclonable Key was published Tuesday in the scientific journal Optics by The Optical Society.


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