Analysis of the RSA-cryptosystem in abstract number rings

• Main Author: Nikita V. Kondratyonok
• Format: Article
• Language: Belarusian
• Published: Belarusian State University 2020-03-01
• Series: Журнал Белорусского государственного университета: Математика, информатика
• Subjects: rsa-cryptosystem; abstract number ring; dedekind ring; factorization; ideal
• Online Access: https://journals.bsu.by/index.php/mathematics/article/view/1106

Quantum computers can be a real threat to some modern cryptosystems (such as the RSA-cryptosystem). The analogue of the RSA-cryptosystem in abstract number rings is not affected by this threat, as there are currently no factorization algorithms using quantum computing for ideals. In this paper considered an analogue of RSA-cryptosystem in abstract number rings. Proved the analogues of theorems related to its cryptographic strength. In particular, an analogue of Wiener’s theorem on the small secret exponent is proved. The analogue of the re-encryption method is studied. On its basis the necessary restrictions on the parameters of the cryptosystem are obtained. It is also shown that in numerical Dedekind rings the factorization problem is polynomial equivalent to factorization in integers.