Multilinear Galois Mode (MGM)
draft-smyshlyaev-mgm-16

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Last updated 2019-12-12
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Network Working Group                                 S. Smyshlyaev, Ed.
Internet-Draft                                                 CryptoPro
Intended status: Informational                              V. Nozdrunov
Expires: June 14, 2020                                       V. Shishkin
                                                                   TC 26
                                                          E. Smyshlyaeva
                                                               CryptoPro
                                                       December 12, 2019

                     Multilinear Galois Mode (MGM)
                        draft-smyshlyaev-mgm-16

Abstract

   Multilinear Galois Mode (MGM) is an authenticated encryption with
   associated data (AEAD) block cipher mode based on EtM principle.  MGM
   is defined for use with 64-bit and 128-bit block ciphers.

   MGM has been standardized in Russia.  It is used as an AEAD mode for
   the GOST block cipher algorithms in many protocols, e.g.  TLS 1.3 and
   IPsec.  This document provides a reference for MGM to enable review
   of the mechanisms in use and to make MGM available for use with any
   block cipher.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on June 14, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   3
   3.  Basic Terms and Definitions . . . . . . . . . . . . . . . . .   3
   4.  Specification . . . . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  MGM Encryption and Authentication Procedure . . . . . . .   4
     4.2.  MGM Decryption and Authentication Check Procedure . . . .   7
   5.  Rationale . . . . . . . . . . . . . . . . . . . . . . . . . .   8
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  10
   Appendix A.  Test Vectors . . . . . . . . . . . . . . . . . . . .  10
   Appendix B.  Contributors . . . . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   Multilinear Galois Mode (MGM) is an authenticated encryption with
   associated data (AEAD) block cipher mode based on EtM principle.  MGM
   is defined for use with 64-bit and 128-bit block ciphers.  The MGM
   design principles can easily be applied to other block sizes.

   MGM has been standardized in Russia.  It is used as an AEAD mode for
   the GOST block cipher algorithms in many protocols, e.g.  TLS 1.3 and
   IPsec.  This document provides a reference for MGM to enable review
   of the mechanisms in use and to make MGM available for use with any
   block cipher.

   This document does not have IETF consensus and does not imply IETF
   support for MGM.

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2.  Conventions Used in This Document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
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