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This paper presents the problem that quantum computing brings to modern cryptography. The basics of post-quantum cryptography and concepts of modern cryptography with an emphasis on the most useful asymmetric encryption algorithms are shown. The paradigms of post quantum cryptographic algorithms, which were implemented in the Open Quantum Safe project and whose effectiveness can be compared with the most popular modern ones, were explained and analysed further in this paper. To compare performances, a test of the time and communication capabilities of selected algorithms was made, the results of which were graphically and descriptively presented. The results of the experiment showed that there is an effective quantum-resistant alternative to existing asymmetric encryption algorithms.
cryptography, post-quantum cryptography, quantum computer, asymmetric encryption algorithms
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