Paper 2016/628

On the properties of the CTR encryption mode of the Magma and Kuznyechik block ciphers with re-keying method based on CryptoPro Key Meshing

Liliya R. Ahmetzyanova, Evgeny K. Alekseev, Igor B. Oshkin, Stanislav V. Smyshlyaev, and 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.

Note: We've added the citation for the important previous work of Abdalla and Bellare, that had been forgotten in the original version of the preprint.

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Preprint. Minor revision.
Keywords
key managementblock cipherscounter mode
Contact author(s)
smyshsv @ gmail com
History
2016-08-27: last of 2 revisions
2016-06-17: received
See all versions
Short URL
https://ia.cr/2016/628
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2016/628,
      author = {Liliya R.  Ahmetzyanova and Evgeny K.  Alekseev and Igor B.  Oshkin and Stanislav V.  Smyshlyaev and Lolita A.  Sonina},
      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},
      howpublished = {Cryptology ePrint Archive, Paper 2016/628},
      year = {2016},
      note = {\url{https://eprint.iacr.org/2016/628}},
      url = {https://eprint.iacr.org/2016/628}
}
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