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.

scholarly journals On a Linear Cryptanalysis of a Family of Modified DES Ciphers with Even Weight S-Boxes

2016 ◽  
Vol 16 (4) ◽  
pp. 3-12 ◽  
Author(s):  
Yuri Borissov ◽  
Peter Boyvalenkov ◽  
Robert Tsenkov
Keyword(s):  
Data Encryption ◽  
General Situation ◽  
Linear Cryptanalysis ◽  
Parity Check ◽  
Data Encryption Standard ◽  
The Individual

Abstract We investigate the effect of inserting extra linearity in the Data Encryption Standard (DES) through appropriate nonsingular linear encodings of the output of the individual S-boxes. More specifically, we examine the general situation when the output of each S-box of the DESis precoded separately intoaproperly constructed copy of the inherent even-weight code of length 4. The study is focused on finding multi-round linear characteristics for thus modified DESciphers having maximal effectiveness. Depending on the particular encodings, it turns out that the effectiveness of interest may be larger but in most cases is smaller than that one for the original DESwith the same number of rounds. The latter means that the complexity of successful linear cryptanalysis against these ciphers will mainly increase comparing to the DESitself. The present research extends inanatural way our previous work[Linear Cryptanalysis and Modified DESwith Parity Check in the S-boxes, LNCS 9540 (2016), pp. 60-78].

scholarly journals Implementasi Algoritma Data Encryption Standard Pada Penyandian Record Database

2018 ◽  
Vol 2 (1) ◽  
pp. 23
Author(s):  
Neti Rusri Yanti ◽  
Alimah Alimah ◽  
Desi Afrida Ritonga
Keyword(s):  
Block Cipher ◽  
Block Size ◽  
Data Encryption ◽  
Data Encryption Standard ◽  
Cryptographic Algorithms ◽  
Secure Data ◽  
Cryptographic System

Record databases are generally still often displayed in text form as information for users, so it can facilitate cryptanalyst to access and provide opportunities to do the leak, distribute or modify the database records. One of the cryptographic algorithms used to secure data is using the DES algorithm to encrypt the data to be stored or sent. The DES algorithm belongs to a cryptographic system of symmetry and is a type of block cipher. DES operates on a 64-bit block size. DES describes 64 bits of plaintext to 64 bits of ciphertext using 56 bits of internal key (internal key) or up-key (subkey). The internal key is generated from an external key 64-bit length. This research describes the process of securing database records by encrypting it based on DES algorithm, resulting in text record databases in the form of passwords that are difficult to understand and understand by others. This is done in an attempt to minimize the misuse of database records.

scholarly journals Data Security Implementation using Data Encryption Standard Method for Student Values at the Faculty of Medicine, University of North Sumatra

2021 ◽  
Vol 1755 (1) ◽  
pp. 012022
Author(s):  
Ali Ikhwan ◽  
Rafikha Aliana A. Raof ◽  
Phaklen Ehkan ◽  
Yasmin Yacob ◽  
M. Syaifuddin
Keyword(s):  
Standard Method ◽  
Data Security ◽  
Data Encryption ◽  
Data Encryption Standard ◽  
Student Values ◽  
Using Data ◽  
North Sumatra

scholarly journals SURVEY: EFFICIENT HYBRID ALGOR ITHMS OF CRYPTOGRAPHY

2020 ◽  
Vol 2 (4) ◽  
pp. 1-16
Author(s):  
Mays M. HOOBI
Keyword(s):  
Data Exchange ◽  
Search Space ◽  
Research Unit ◽  
Data Encryption ◽  
Digital Data ◽  
Secret Data ◽  
Data Encryption Standard ◽  
Hybrid Approaches ◽  
Private And Public ◽  
Secure Transmission

Day after day, the digital data sizes undergo rapid increases over Internet, it is significant; the data shouldn’t be accessed by the unauthorized users. The attackers attempt at accessing those sensitive part of the data. There is a necessity for the prevention of the unauthorized access of the data and guarantee the secure data exchange. A variety of the cryptographic approaches have been used for the conversion of the secret data of the users into secure ciphertext formats. The cryptographic methods have been based on, private and public keys. The researchers have worked on the efficient and secure transmission of data and presented a variety of the cryptographic approaches. For the efficient and secure transmission of the data over networks, there is a necessity of using hybrid approaches of encryption. In this article, various encryption methods are reviewed such as Rijndael, Number Theory Research Unit, Data Encryption Standard, 3 Data Encryption Standard, Elliptic Curve Cryptography, Rivest–Shamir–Adleman, Optimal Asymmetric Encryption Padding, Diffie-Hellman, HiSea, Improved Caesar, Digital Signature, and Advance Encryption Standard. Keywords: Brute Force Attack, Cryptography, Digital Data, Hybrid Encryption, Search Space.

scholarly journals High throughput FPGA Implementation of Data Encryption Standard with time variable sub-keys

2016 ◽  
Vol 6 (1) ◽  
pp. 298
Author(s):  
Soufiane Oukili ◽  
Seddik Bri
Keyword(s):  
High Throughput ◽  
Data Encryption ◽  
Fpga Implementation ◽  
Time Variable ◽  
Digital Data ◽  
Data Encryption Standard ◽  
Gate Arrays ◽  
Hardware Implementations ◽  
Symmetric Key ◽  
Legacy Applications

<span lang="EN-US">The Data Encryption Standard (DES) was the first modern and the most popular symmetric key algorithm used for encryption and decryption of digital data. Even though it is nowadays not considered secure against a determined attacker, it is still used in legacy applications. This paper presents a secure and high-throughput Field Programming Gate Arrays (FPGA) implementation of the Data Encryption Standard algorithm. This is achieved by combining 16 pipelining concept with time variable sub-keys and compared with previous illustrated encryption algorithms. The sub-keys vary over time by changing the key schedule permutation choice 1. Therefore, every time the plaintexts are encrypted by different sub-keys. The proposed algorithm is implemented on Xilinx Spartan-3e (XC3s500e) FPGA. Our DES design achieved a data encryption rate of 10305.95 Mbit/s and 2625 number of occupied CLB slices. These results showed that the proposed implementation is one of the fastest hardware implementations with much greater security.</span>

scholarly journals Secured Data Transmission Using Wavelet Based Steganography And Cryptography

2013 ◽  
Vol 6 (2) ◽  
pp. 311-316 ◽  
Author(s):  
Mittapalli Indrasena Reddy ◽  
V. Uday Kumar ◽  
K. Subba Reddy ◽  
P. Venkat Vijay Kumar
Keyword(s):  
Wavelet Transform ◽  
Digital Watermarking ◽  
Digital Image ◽  
Data Transmission ◽  
Data Encryption ◽  
Least Significant Bit ◽  
Data Encryption Standard ◽  
Plain Text ◽  
Using Data ◽  
Secured Data

Steganography and cryptographic methods are used together with wavelets to increase the security of the data while transmitting through networks. Another technology, the digital watermarking is the process of embedding information into a digital (image) signal. Before embedding the plain text into the image, the plain text is encrypted by using Data Encryption Standard (DES) algorithm. The encrypted text is embedded into the LL subband of the wavelet decomposed image using Least Significant Bit (LSB) method. Then the inverse wavelet transform is applied and the resultant image is transmitted to the receiver. The receiver will perform the same operations in reverse order.

Comparative Study of Cryptographic Algorithms

2019 ◽  
Vol 8 (1) ◽  
pp. 13-22
Author(s):  
Mohanad ABDULHAMID ◽  
Nyagathu GICHUKI
Keyword(s):  
Comparative Study ◽  
Data Encryption ◽  
The Other ◽  
Public Key ◽  
Data Encryption Standard ◽  
Private Key ◽  
Other Hand ◽  
Encryption And Decryption ◽  
Cryptographic Algorithms

This paper presents a comparative study of two cryptosystems, Data Encryption Standard (DES) and the Rivest-Shamir-Adleman (RSA) schemes. DES is a symmetric (or private) key cipher. This means that the same key is used for encryption and decryption. RSA, on the other hand, is an asymmetric (or public) key cipher, meaning that two keys are used, one for encryption and the other for decryption. The objective of this paper is to implement these two schemes in software. The program is written in the Java™ language. It generates a key from a passphrase given by the user, encrypts and decrypts a message using the same key, for the case of DES. In RSA, decryption is done by computing the decryption key from the encryption key. Finally, the program returns the time taken to encrypt and decrypt a message.

High throughput FPGA Implementation of Data Encryption Standard with time variable sub-keys

2016 ◽  
Vol 6 (1) ◽  
pp. 298 ◽  
Author(s):  
Soufiane Oukili ◽  
Seddik Bri
Keyword(s):  
High Throughput ◽  
Data Encryption ◽  
Fpga Implementation ◽  
Time Variable ◽  
Digital Data ◽  
Data Encryption Standard ◽  
Gate Arrays ◽  
Hardware Implementations ◽  
Symmetric Key ◽  
Legacy Applications

<span lang="EN-US">The Data Encryption Standard (DES) was the first modern and the most popular symmetric key algorithm used for encryption and decryption of digital data. Even though it is nowadays not considered secure against a determined attacker, it is still used in legacy applications. This paper presents a secure and high-throughput Field Programming Gate Arrays (FPGA) implementation of the Data Encryption Standard algorithm. This is achieved by combining 16 pipelining concept with time variable sub-keys and compared with previous illustrated encryption algorithms. The sub-keys vary over time by changing the key schedule permutation choice 1. Therefore, every time the plaintexts are encrypted by different sub-keys. The proposed algorithm is implemented on Xilinx Spartan-3e (XC3s500e) FPGA. Our DES design achieved a data encryption rate of 10305.95 Mbit/s and 2625 number of occupied CLB slices. These results showed that the proposed implementation is one of the fastest hardware implementations with much greater security.</span>

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