Welcome to the resource topic for 2016/628
Title:
On the properties of the CTR encryption mode of the Magma and Kuznyechik block ciphers with re-keying method based on CryptoPro Key Meshing
Authors: Liliya R. Ahmetzyanova, Evgeny K. Alekseev, Igor B. Oshkin, Stanislav V. Smyshlyaev, Lolita A. Sonina
Abstract:This paper presents a security bound in the standard security model for the Magma cipher CTR encryption mode and the «CryptoPro Key Meshing» (CPKM) re-keying method that was previously used with the GOST 28147-89 cipher. We enumerate the main requirements that should be followed during the development of re-keying methods, then we propose a modified method and justify its advantages over CPKM. We also obtain certain results about the operational features of the Kuznyechik cipher CTR encryption mode with several re-keying methods.
ePrint: https://eprint.iacr.org/2016/628
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