Search academic texts

Information × Registration Number 0222U000150, 0121U113832 , R & D reports Title Secret key transmission system based on quantum cryptography protocols popup.stage_title Head Vasiliu Yevhen V., д.т.н. Registration Date 03-01-2022 Organization State University of Intellectual Technologies and Communications popup.description2  The object of research is a secure system of quantum key distribution on optical fiber. The objective of the project is to develop an experimental model of a secret key transmission system based on quantum cryptography protocols. The main methods of extracting information from optical fiber, which can be used for passive attacks on quantum key distribution systems, are considered. It is cleared up that the most dangerous is the compensatory method due to the complexity of its detection. Different types of attacks on quantum cryptography systems are analyzed. One of the effective methods of counteracting the photon number splitting attack is the use of decoy states. The mathematical background is considered and the corresponding algorithms for three stages of the stack of quantum key distribution protocols are analyzed. The algorithm for estimating the noise level in the sifted keys of legitimate users is analyzed. The question of choosing the size of a subset of bits used by legitimate users for their open comparison when estimating the noise level is considered. For this purpose, a computer simulation was performed and the corresponding recommended sizes of bit subsets were presented. Two algorithms for finding and correcting errors in sifted keys are considered. The issue of choosing the block size for the search and error correction algorithm depending on the noise level is studied in detail. Based on the performed calculations, the appropriate block sizes are recommended. The mathematical background of the privacy amplification procedure is analyzed. The eavesdropper's information was calculated depending on the length of the final secret key at different values of the additional security parameter. It was found that to perform the privacy amplification procedure it is enough to choose this parameter of 0.1 for the final key length greater than 40-50 bits. Product Description popup.authors Gonchar Dmytro I Limar Ihor V. Riabukha Oleksandr Mykolayovych Sidenʹ Serhiy V. Skliaruk Anastasiia V Staikutsa Serhii V popup.nrat_date 2022-03-09 Close