GOST R 34.12-2015: Block Cipher "Magma"
draft-dolmatov-magma-06

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Internet Engineering Task Force                         V. Dolmatov, Ed.
Internet-Draft                                      JSC "NPK Kryptonite"
Updates: 5830 (if approved)                                 D. Baryshkov
Intended status: Informational                               Auriga, Inc
Expires: September 23, 2020                               March 22, 2020

                GOST R 34.12-2015: Block Cipher "Magma"
                        draft-dolmatov-magma-06

Abstract

   In addition to a new cipher with block length of n=128 bits (referred
   to as "Kyznyechik" and described in RFC 7801) Russian Federal
   standard GOST R 34.12-2015 includes an updated version of the block
   cipher with block length of n=64 bits and key length k=256 bits,
   which is also referred to as "Magma".  The algorithm is an updated
   version of an older block cipher with block length of n=64 bits
   described in GOST 28147-89 (RFC 5830).  This document is intended to
   be a source of information about the updated version of the 64-bit
   cipher.  It may facilitate the use of the block cipher in Internet
   applications by providing information for developers and users of
   GOST 64-bit cipher with the revised version of the cipher for
   encryption and decryption.

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Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Dolmatov & Baryshkov   Expires September 23, 2020               [Page 1]
Internet-Draft   GOST R 34.12-2015: Block Cipher "Magma"      March 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  General Information . . . . . . . . . . . . . . . . . . . . .   3
   3.  Definitions and Notations . . . . . . . . . . . . . . . . . .   3
     3.1.  Definitions . . . . . . . . . . . . . . . . . . . . . . .   3
     3.2.  Notations . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Parameter Values  . . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  Nonlinear Bijection . . . . . . . . . . . . . . . . . . .   5
     4.2.  Transformations . . . . . . . . . . . . . . . . . . . . .   6
     4.3.  Key Schedule  . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Basic Encryption Algorithm  . . . . . . . . . . . . . . . . .   7
     5.1.  Encryption  . . . . . . . . . . . . . . . . . . . . . . .   7
     5.2.  Decryption  . . . . . . . . . . . . . . . . . . . . . . .   7
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Appendix A.  Test Examples  . . . . . . . . . . . . . . . . . . .   9
     A.1.  Transformation t  . . . . . . . . . . . . . . . . . . . .   9
     A.2.  Transformation g  . . . . . . . . . . . . . . . . . . . .   9
     A.3.  Key schedule  . . . . . . . . . . . . . . . . . . . . . .   9
     A.4.  Test Encryption . . . . . . . . . . . . . . . . . . . . .  10
     A.5.  Test Decryption . . . . . . . . . . . . . . . . . . . . .  11
   Appendix B.  Background . . . . . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   The Russian Federal standard [GOSTR3412-2015] specifies basic block
   ciphers used as cryptographic techniques for information processing
   and information protection including the provision of
   confidentiality, authenticity, and integrity of information during
   information transmission, processing and storage in computer-aided
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