TITLE:
Algebraic Cryptanalysis of GOST Encryption Algorithm
AUTHORS:
Ludmila Babenko, Ekaterina Maro
KEYWORDS:
Encryption Algorithm GOST; GOST; S-Box; Systems of Multivariate Quadratic Equations; Algebraic Cryptanalysis; Extended Linearization Method; Gaussian Elimination
JOURNAL NAME:
Journal of Computer and Communications,
Vol.2 No.4,
March
17,
2014
ABSTRACT: This paper observes approaches to algebraic
analysis of GOST 28147-89 encryption algorithm (also known as simply GOST),
which is the basis of most secure information systems in Russia. The general
idea of algebraic analysis is based on the representation of initial encryption
algorithm as a system of multivariate quadratic equations, which define relations
between a secret key and a cipher text. Extended linearization method is
evaluated as a method for solving the nonlinear sys- tem of equations.