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Continuous-variable quantum authentication of physical unclonable keys

View Article: PubMed Central - PubMed

ABSTRACT

We propose a scheme for authentication of physical keys that are materialized by optical multiple-scattering media. The authentication relies on the optical response of the key when probed by randomly selected coherent states of light, and the use of standard wavefront-shaping techniques that direct the scattered photons coherently to a specific target mode at the output. The quadratures of the electromagnetic field of the scattered light at the target mode are analysed using a homodyne detection scheme, and the acceptance or rejection of the key is decided upon the outcomes of the measurements. The proposed scheme can be implemented with current technology and offers collision resistance and robustness against key cloning.

No MeSH data available.


Related in: MedlinePlus

Condition (17) for various values of the mean photon number per incoming mode.The horizontal band marks the regime of reported enhancements in the literature for different wavefront-shaping set-ups, which range from 50 to about 100032. Parameter l/L = 0.2.
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f4: Condition (17) for various values of the mean photon number per incoming mode.The horizontal band marks the regime of reported enhancements in the literature for different wavefront-shaping set-ups, which range from 50 to about 100032. Parameter l/L = 0.2.

Mentions: Condition (17) ensures the detection of a false key, because it implies that for at least one of the quadratures, the corresponding distribution has negligible overlap with the bin used by the verifier, and hence that it will have negligible contribution to the estimation of pin. Typically, the number of modes and the enhancement depend strongly on the details of the wavefront-shaping set-up, whereas the fraction l/L depends only on the key. For a fixed wavefront-shaping set-up, and assuming that the keys used in the EAP are characterized by the same ratio l/L, one can easily adjust the mean number of photons per incoming mode, μc/N, so that the above condition is satisfied. As shown in Fig. 4, condition (17) is satisfied in many existing wavefront-shaping set-ups, for a broad range of mean photon number per mode values.


Continuous-variable quantum authentication of physical unclonable keys
Condition (17) for various values of the mean photon number per incoming mode.The horizontal band marks the regime of reported enhancements in the literature for different wavefront-shaping set-ups, which range from 50 to about 100032. Parameter l/L = 0.2.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5385567&req=5

f4: Condition (17) for various values of the mean photon number per incoming mode.The horizontal band marks the regime of reported enhancements in the literature for different wavefront-shaping set-ups, which range from 50 to about 100032. Parameter l/L = 0.2.
Mentions: Condition (17) ensures the detection of a false key, because it implies that for at least one of the quadratures, the corresponding distribution has negligible overlap with the bin used by the verifier, and hence that it will have negligible contribution to the estimation of pin. Typically, the number of modes and the enhancement depend strongly on the details of the wavefront-shaping set-up, whereas the fraction l/L depends only on the key. For a fixed wavefront-shaping set-up, and assuming that the keys used in the EAP are characterized by the same ratio l/L, one can easily adjust the mean number of photons per incoming mode, μc/N, so that the above condition is satisfied. As shown in Fig. 4, condition (17) is satisfied in many existing wavefront-shaping set-ups, for a broad range of mean photon number per mode values.

View Article: PubMed Central - PubMed

ABSTRACT

We propose a scheme for authentication of physical keys that are materialized by optical multiple-scattering media. The authentication relies on the optical response of the key when probed by randomly selected coherent states of light, and the use of standard wavefront-shaping techniques that direct the scattered photons coherently to a specific target mode at the output. The quadratures of the electromagnetic field of the scattered light at the target mode are analysed using a homodyne detection scheme, and the acceptance or rejection of the key is decided upon the outcomes of the measurements. The proposed scheme can be implemented with current technology and offers collision resistance and robustness against key cloning.

No MeSH data available.


Related in: MedlinePlus