Doroshenko, YuriiYadukha, Dariya2026-03-022026-03-022025Doroshenko, Y. Pseudorandomness Analysis of Ciphertexts in the AJPS-2 Cryptosystem / Yurii Doroshenko, Dariya Yadukha // Theoretical and Applied Cybersecurity: scientific journal. – 2025. – Vol. 7, No. 3. – P. 31-37. – Bibliogr.: 7 ref.https://ela.kpi.ua/handle/123456789/79148This paper investigates the post-quantum cryptographic primitive AJPS-2 based on arithmetic moduloMersenne numbers. We describe modified versions of this cryptosystem that utilize generalizedMersenne numbers and Crandall numbers as moduli. We conduct a comparative analysis of ciphertextpseudorandomness for the original cryptosystem and its modifications using the NIST SP 800-22pseudorandomness test suite. The results show that the use of alternative moduli increases the overallstability and parameters variability of the AJPS-2 cryptosystem.enAJPS cryptosystempost-quantum cryptographyMersenne numbersgeneralized MersennenumbersCrandall numbersArticleP. 31-37https://doi.org/10.20535/tacs.2664-29132025.3.345270003.26