Wydział: International Centre for Theory of Quantum Technologies (ICTQT)

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nr 111/24/2024
▪ Konrad Schlichtholz, PhD std
▪ Bianka Wołoncewicz, PhD std
▪ PhD Tamoghna Das
▪ PhD Marcin Markiewicz
▪ Prof. Marek Żukowski

International Centre for Theory of Quantum Technologies (ICTQT)


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Wynalazek stanowi przedmiot zgłoszeń patentowych w EPO: EP23199255.3
Technologia zwalidowana w warunkach laboratoryjnych

Single-photon-based self-testing quantum random number generator

Random number generation is a crucial aspect of various fields of study, including cryptography, statistical analysis, and simulations. Random numbers are used to generate cryptographic keys, to simulate stochastic events, and to ensure the fairness of games and lotteries, among other applications. However, generating truly random numbers is a challenging task.

Most computer-based random number generators rely on algorithms that are deterministic and thus in practice predictable, and thus produce only pseudo-random numbers.

The invention refers to self-testing quantum devices allowing generation of truly random bit strings.

A features of quantum random number generators (QRNGs) is the possibility of self-testing of the device. A self-testing device can monitor the output statistics to verify the quality of the obtained randomness, and further based on this knowledge improve on this quality.

In QRNGs quantum measurements of physical quantities like photon polarization are used to generate random numbers that cannot be predicted or reproduced by an attacker. These devices offer high levels of security, making them ideal for applications for which security is critical.

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