Giorgi Iashvili

Work place: Caucasus University/CST/Tbilisi, Georgia, 0102



Research Interests: Information-Theoretic Security, Network Security, Information Security


Mr. Giorgi Iashvili is Ph.D. candidate at Georgian Technical University. He is making his thesis on the secure design of cryptography schemes. He is the technical director of Scientific Cyber Security Association (SCSA) and the lecturer at Caucasus University.

Author Articles
Novel Quantum Random Number Generator with the Improved Certification Method

By Maksim Iavich Tamari Kuchukhidze Giorgi Iashvili Sergiy Gnatyuk Razvan Bocu

DOI:, Pub. Date: 8 Aug. 2021

Random numbers play an important role in many areas, for example, encryption, cryptography, static analysis, simulations. It is also a fundamental resource in science and engineering. There are algorithmically generated numbers that are similar to random distributions, but are not actually random, called pseudo random number generators. In many cases the tasks to be solved are based on the unpredictability of random numbers, which cannot be guaranteed in the case of pseudo random number generators, true randomness is required. In such situations, we use real random number generators whose source of randomness is unpredictable random events.
Quantum Random Number Generators (QRNGs) generate real random numbers based on the inherent randomness of quantum measurements. Our goal is to generate fast random numbers at a lower cost. At the same time, a high level of randomness is essential.
Through quantum mechanics, we can obtain true numbers using the unpredictable behavior of a photon, which is the basis of many modern cryptographic protocols. It is essential to trust cryptographic random number generators to generate only true random numbers. This is why certification methods are needed which will check both the operation of the device and the quality of the random bits generated.
We present the improved novel quantum random number generator, which is based the on time of arrival QRNG. It uses the simple version of the detectors with few requirements. The novel QRNG produces more than one random bit per each photon detection. It is rather efficient and has a high level of randomness.
Self-testing as well as device independent quantum random number generation methods are analyzed. The advantages and disadvantages of both methods are identified. The model of a novel semi self-testing certification method for quantum random number generators (QRNG) is offered in the paper. This method combines different types of certification approaches and is rather secure and efficient. Finally, the novel certification method is integrated into the model of the new quantum random number generator. The paper analyzes its security and efficiency.

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