On Rijndael ByteSub Transformation  

作　　者：W. Eltayeb Ahmed 

机构地区：[1]Mathematics and Statistics Department, Faculty of Science, Imam Mohammad Ibn Saud Islamic University, Riyadh, KSA [2]Department of Basics and Engineering Sciences, Faculty of Engineering, University of Khartoum, Khartoum, Sudan

出　　处：《Applied Mathematics》2019年第3期113-118,共6页应用数学（英文）

摘　　要：The first step in converting a plaintext to ciphertext by the famous Advanced Encryption Standard (AES), which is called Rijndael ByteSub Transformation, involves some operations: computing a multiplicative inverse, multiplying this multiplicative inverse by a specific matrix, and adding the result to a specific vector. The purpose of this research is to simplify these operations. This paper gives elegant techniques and presents the matrices multiplication as simple XOR operations, and the result is a simple, straightforward way finding the transformation.The first step in converting a plaintext to ciphertext by the famous Advanced Encryption Standard (AES), which is called Rijndael ByteSub Transformation, involves some operations: computing a multiplicative inverse, multiplying this multiplicative inverse by a specific matrix, and adding the result to a specific vector. The purpose of this research is to simplify these operations. This paper gives elegant techniques and presents the matrices multiplication as simple XOR operations, and the result is a simple, straightforward way finding the transformation.

关 键 词：RIJNDAEL CIPHER Advanced ENCRYPTION Standard MULTIPLICATIVE INVERSE XOR Operation 

分 类 号：O1[理学—数学]