Cryptology ePrint Archive: Report 2015/650

A New Encryption Standard of Ukraine: The Kalyna Block Cipher

Roman Oliynykov and Ivan Gorbenko and Oleksandr Kazymyrov and Victor Ruzhentsev and Oleksandr Kuznetsov and Yurii Gorbenko and Oleksandr Dyrda and Viktor Dolgov and Andrii Pushkaryov and Ruslan Mordvinov and Dmytro Kaidalov

Abstract: The Kalyna block cipher was selected during Ukrainian National Public Cryptographic Competition (2007-2010) and its slight modification was approved as the new encryption standard of Ukraine in 2015. Main requirements for Kalyna were both high security level and high performance of software implementation on general-purpose 64-bit CPUs. The cipher has SPN-based (Rijndael-like) structure with increased MDS matrix size, a new set of four different S-boxes, pre- and postwhitening using modulo 2^{64} addition and a new construction of the key schedule. Kalyna supports block size and key length of 128, 256 and 512 bits (key length can be either equal or double of the block size). On the time of this paper publishing, no more effective cryptanalytic attacks than exhaustive search are known. In this paper we present the adapted English translated specification of Kalyna as it is given in the national standard of Ukraine.

Category / Keywords: secret-key cryptography / block cipher, Kalyna, DSTU 7624:2014

Date: received 30 Jun 2015

Contact author: roliynykov at gmail com

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Version: 20150701:011128 (All versions of this report)

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