STUDY OF THE CRYPTOGRAPHIC STRENGTH OF THE S-BOX OBTAINED ON THE BASIS OF EXPONENTIATION MODULO
Journal Title: Scientific Journal of Astana IT University - Year 2022, Vol 12, Issue 12
Abstract
This article presents one of the main transformations of symmetric block ciphers used to protect confidential information, a new method for obtaining a non-linear S block, and an analysis of the results obtained. The S-box obtained by this method can be used as a nonlinear transformation in block cipher algorithms to protect confidential data transmitted over an open channel. In most well-known works in the field of analysis and synthesis of modern block symmetric ciphers, S-box is used as a mathematical apparatus for cryptographic Boolean functions. In this case, each S-box is represented by a set of composite Boolean functions whose properties characterize the efficiency of the nonlinear substitution node. Substitution nodes for modern symmetric primitives, including key unfolding functions, are usually implemented as replacement tables. Considering that in most modern block symmetric ciphers for introducing round keys, the encryption algorithm uses a linear operation (bitwise addition modulo 2), S-blocks are the only elements responsible for the cryptographic stability of block encryption algorithms. The required number of rounds of block symmetric ciphers is selected taking into account the results of the cryptographic analysis performed, provided that the properties of S-boxes are specified. As the main criteria and performance indicators, the balance and nonlinearity of composite Boolean functions are used; strict avalanche criterion (SAC), propagation criterion; algebraic degree; the value of the autocorrelation function. In this article, a study was made of the nonlinearity and strict avalanche criterion (SAC) of the S-box used in the block symmetric encryption algorithm. The results of the study were compared with the S-boxes of modern cryptographic algorithms and showed good results.
Authors and Affiliations
Ardabek Khompysh, Nursulu Kapalova, Kunbolat Algazy, Kairat Sakan
Keywords
Related Articles
- EP ID EP713379
- DOI 10.37943/12DZLQ4553
- Views 71
- Downloads 0
A CONCEPTUAL MODEL AND PROCESS MANAGEMENT METHOD OF THE PLANNING AND MONITORING OF THE WORKLOAD IN THE EDUCATIONAL ENVIRONMENT
The article formulates the aims of HEI’s activities, as well as approaches to managing all actions that ensure the achievement of the stated aims. The process approach is defined as the main one in the university managem...
MULTILEVEL HYBRID INFRASTRUCTURE PROGRAM MANAGEMENT
An analysis of trends in the development of infrastructure management systems shows that the key factors are reliability of implementation, efficiency in creating values and environmental harmonization. At the same time,...
CONFIDENTIAL INFORMATION SECRET METHOD
The article deals with the issues of hiding text information in a graphic file. Most often, one or two least significant bits of the image pixels are modified. To do this, each byte of the secret message is divided into...
DEPENDENCE OF COMPETITIVENESS ON THE LEVEL OF BUSINESS CONFIDENCE OF THE ENTERPRISE
The article deals with the issue of ensuring the competitiveness of construction contractors depending on the level of business confidence, which is esteemed as the amount paid on schedule construction contracts. To im...
COMPLEX EVENT PROCESSING APPROACH ON SUBSCRIBERS’ DATA OF TELECOM OPERATOR
Nowadays the usage of mobile phones has reached extremely large worldwide proportions and is increasing dramatically. There is a stronger need to decrypt the important information that is hidden among them. Even all re...