Differential Cryptanalysis of the Data Encryption Standard

1993 ◽  
Author(s):  
Eli Biham ◽  
Adi Shamir
Keyword(s):  
Data Encryption ◽  
Differential Cryptanalysis ◽  
Data Encryption Standard

scholarly journals Breaking Data Encryption Standard with a Reduced Number of Rounds Using Metaheuristics Differential Cryptanalysis

Entropy ◽  
2021 ◽  
Vol 23 (12) ◽  
pp. 1697
Author(s):  
Kamil Dworak ◽  
Urszula Boryczka
Keyword(s):  
Memetic Algorithm ◽  
Fitness Function ◽  
Search Space ◽  
Memetic Algorithms ◽  
Data Encryption ◽  
Differential Cryptanalysis ◽  
Search Process ◽  
Suggested Approach ◽  
Data Encryption Standard ◽  
Metaheuristic Techniques

This article presents the author’s own metaheuristic cryptanalytic attack based on the use of differential cryptanalysis (DC) methods and memetic algorithms (MA) that improve the local search process through simulated annealing (SA). The suggested attack will be verified on a set of ciphertexts generated with the well-known DES (data encryption standard) reduced to six rounds. The aim of the attack is to guess the last encryption subkey, for each of the two characteristics Ω. Knowing the last subkey, it is possible to recreate the complete encryption key and thus decrypt the cryptogram. The suggested approach makes it possible to automatically reject solutions (keys) that represent the worst fitness function, owing to which we are able to significantly reduce the attack search space. The memetic algorithm (MASA) created in such a way will be compared with other metaheuristic techniques suggested in literature, in particular, with the genetic algorithm (NGA) and the classical differential cryptanalysis attack, in terms of consumption of memory and time needed to guess the key. The article also investigated the entropy of MASA and NGA attacks.

scholarly journals Enhancing Security in Digital Data using various Function of S-box in Data Encryption Standard Method

Webology ◽  
2021 ◽  
Vol 18 (2) ◽  
pp. 767-789
Author(s):  
Leya Elizabeth Sunny ◽  
Dr. Varghese Paul
Keyword(s):  
Standard Method ◽  
Data Encryption ◽  
Differential Cryptanalysis ◽  
Digital Data ◽  
Linear Cryptanalysis ◽  
Data Encryption Standard ◽  
Plain Text ◽  
Cryptographic Algorithms

Stage of networking is quintessential task in which security comes into play. Securing these networks which contains confidential digital data that needs to secured will be the agenda of cryptography. Many cryptographic algorithms increment their strengths over parameters like key size, increasing the rounds of iteration and finally using confusion box as S-box as it has best robustness. So, this paper mainly focusses over securing digital data with the help of S-box function over Data Encryption Standard (DES) algorithm. For this, a plain text and key will be given to this DES as it extracts 8x8(64) bit characters from the key and converting them into its corresponding ASCII value and are concatenating to form an 8 value by taking mod16. These will give to 8 S-box in order to generate its corresponding output to make even more secure and also shows dynamic DES gives much result than other crypto methods. The evaluation of this integrated s-box and DES shows much fruitful results over factors like non-linearity, Avalanche criterion, Balance, Robustness to linear cryptanalysis, Robustness to differential cryptanalysis.

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