scholarly journals Modified AES for Text and Image Encryption

2018 ◽  
Vol 11 (3) ◽  
pp. 942
Author(s):  
Heidilyn V. Gamido ◽  
Ariel M. Sison ◽  
Ruji P. Medina
Keyword(s):  
Advanced Encryption Standard ◽  
Text And Image ◽  
Avalanche Effect ◽  
Aes Algorithm ◽  
Cpu Usage ◽  
Computational Requirement ◽  
Encryption Algorithms ◽  
Mathematical Computation ◽  
Mathematical Operations ◽  
Modified Aes

Advanced Encryption Standard (AES) is one of the most frequently used encryption algorithms. In the study, the Advanced Encryption Standard is modified to address its high computational requirement due to the complex mathematical operations in MixColumns Transformation making the encryption process slow. The modified AES used Bit Permutation to replace the MixColumns Transformation in AES since bit permutation is easy to implement and it does not have any complex mathematical computation. Results of the study show that the modified AES algorithm exhibited increased efficiency due to the faster encryption time and reduced CPU usage. The modified AES algorithm also yielded higher avalanche effect which improved the performance of the algorithm.

scholarly journals Implementation of a bit permutation-based advanced encryption standard for securing text and image files

2020 ◽  
Vol 19 (3) ◽  
pp. 1596
Author(s):  
Heidilyn V Gamido
Keyword(s):  
Encryption Algorithm ◽  
Advanced Encryption Standard ◽  
Differential Attack ◽  
Avalanche Effect ◽  
Aes Algorithm ◽  
Computational Requirement ◽  
Change Intensity ◽  
Modified Algorithm ◽  
Modified Aes ◽  
The Ideal

<span>The paper proposes a modification of the Advanced Encryption Standard (AES) to address its high computational requirement steaming from the complex mathematical operations in the MixColumns Transformation which makes the encryption process slow. Bit Permutation was used instead of the MixColumns Transformation since the use of bit permutation in an encryption algorithm achieves efficiency by providing minimum encryption time and memory requirement. Results of the study showed that the modified AES algorithm exhibited faster encryption by 18.47% and faster decryption by 18.77% for text files. The modified AES algorithm also resulted to 16.53% higher avalanche effect compared with the standard AES thus improving the security performance. Application of the modified AES in encrypting images in Cipher Block Chaining mode showed that the modified algorithm also exhibited 16.88% faster encryption and 11.96% decryption compared with the standard AES. Likewise, modifying the algorithm achieved the ideal result in the histogram analysis, information entropy, the correlation coefficient of adjacent pixels to resist statistical attack.  The ideal value in number of pixels change rate and unified average change intensity were also achieved making the modified algorithm resistant to differential attack. These results show that modifying AES by using bit permutation to replace MixColumns Transformation was able to address the high computational requirement of the algorithm resulting in a faster and more secure encryption algorithm for text files and images</span><span>.</span>

scholarly journals Modified Advanced Encryption Standard Algorithm for Information Security

Symmetry ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1484 ◽  
Author(s):  
Oluwakemi Christiana Abikoye ◽  
Ahmad Dokoro Haruna ◽  
Abdullahi Abubakar ◽  
Noah Oluwatobi Akande ◽  
Emmanuel Oluwatobi Asani
Keyword(s):  
Execution Time ◽  
Advanced Encryption Standard ◽  
Avalanche Effect ◽  
Plain Text ◽  
Aes Algorithm ◽  
Cipher Text ◽  
Encryption And Decryption ◽  
To Come ◽  
Cryptographic Techniques ◽  
Modified Aes

The wide acceptability of Advanced Encryption Standard (AES) as the most efficient of all of the symmetric cryptographic techniques has further opened it up to more attacks. Efforts that were aimed at securing information while using AES is still being undermined by the activities of attackers This has further necessitated the need for researchers to come up with ways of enhancing the strength of AES. This article presents an enhanced AES algorithm that was achieved by modifying its SubBytes and ShiftRows transformations. The SubBytes transformation is modified to be round key dependent, while the ShiftRows transformation is randomized. The rationale behind the modification is to make the two transformations round key dependent, so that a single bit change in the key will produce a significant change in the cipher text. The conventional and modified AES algorithms are both implemented and evaluated in terms avalanche effect and execution time. The modified AES algorithm achieved an avalanche effect of 57.81% as compared to 50.78 recorded with the conventional AES. However, with 16, 32, 64, and 128 plain text bytes, the modified AES recorded an execution time of 0.18, 0.31, 0.46, and 0.59 ms, respectively. This is slightly higher than the results obtained with the conventional AES. Though a slightly higher execution time in milliseconds was recorded with the modified AES, the improved encryption and decryption strength via the avalanche effects measured is a desirable feat.

scholarly journals Hybrid Approach of Modified AES

Cryptography ◽  
2020 ◽  
pp. 129-141
Author(s):  
Filali Mohamed Amine ◽  
Gafour Abdelkader
Keyword(s):  
Time Complexity ◽  
Input Data ◽  
Hybrid Approach ◽  
Encryption Algorithm ◽  
Advanced Encryption Standard ◽  
Aes Algorithm ◽  
Symmetric Key ◽  
Encryption Algorithms ◽  
Aes Encryption Algorithm ◽  
Modified Aes

Advanced Encryption Standard is one of the most popular symmetric key encryption algorithms to many works, which have employed to implement modified AES. In this paper, the modification that has been proposed on AES algorithm that has been developed to decrease its time complexity on bulky data and increased security will be included using the image as input data. The modification proposed itself including alteration in the mix column and shift rows transformation of AES encryption algorithm, embedding confusion-diffusion. This work has been implemented on the most recent Xilinx Spartan FPGA.

Hybrid Approach of Modified AES

2017 ◽  
Vol 7 (4) ◽  
pp. 83-93
Author(s):  
Filali Mohamed Amine ◽  
Gafour Abdelkader
Keyword(s):  
Time Complexity ◽  
Input Data ◽  
Hybrid Approach ◽  
Encryption Algorithm ◽  
Advanced Encryption Standard ◽  
Aes Algorithm ◽  
Symmetric Key ◽  
Encryption Algorithms ◽  
Aes Encryption Algorithm ◽  
Modified Aes

Advanced Encryption Standard is one of the most popular symmetric key encryption algorithms to many works, which have employed to implement modified AES. In this paper, the modification that has been proposed on AES algorithm that has been developed to decrease its time complexity on bulky data and increased security will be included using the image as input data. The modification proposed itself including alteration in the mix column and shift rows transformation of AES encryption algorithm, embedding confusion-diffusion. This work has been implemented on the most recent Xilinx Spartan FPGA.

scholarly journals Design and implementation of pipelined and parallel AES encryption systems using FPGA

2020 ◽  
Vol 20 (1) ◽  
pp. 287
Author(s):  
Mohamed Nabil ◽  
Ashraf A. M. Khalaf ◽  
Sara M. Hassan
Keyword(s):  
Big Data ◽  
Parallel Algorithms ◽  
Processing Time ◽  
Advanced Encryption Standard ◽  
Time Consumption ◽  
Design And Implementation ◽  
Aes Algorithm ◽  
Detailed Explanation ◽  
Encryption Algorithms ◽  
Parallel Techniques

<p><span>The information security is one of the most important issues in the design of any communication network.One of the most common encryption algorithms is the Advanced Encryption Standard (AES).The main problem facing the AES algorithm is the high time consumption due to the large number of rounds used for performing the encryption operation. The more time the encryption system consumes to encrypt the data, the more chances the hackers have to break the system.This paper presents two effective algorithms that can be used to solve the mentioned problem and to achieve an effective processing time reduction using pipelined and parallel techniques to perform the encryption steps. These algorithms are based on using certain techniques to make the system able to encrypt many different states (the data will be encrypted) in the same time with no necessity to wait for the previous encryption operation to be completed. These two algorithms are very effective especially for big data size. This paper describes in detail the AES encryption system algorithm and a detailed explanation for the proposed algorithms. Moreover, the research shows the implementation of the three algorithms: the traditional, the pipelined, and the parallel algorithms, and finally a comparison between them.</span></p>

Pengembangan Algoritma Advanced Encryption Standard pada Sistem Keamanan SMS Berbasis Android Menggunakan Algoritma Vigenere

2017 ◽  
Vol 8 (2) ◽  
Author(s):  
Sugiyanto Sugiyanto ◽  
Rinci Kembang Hapsari
Keyword(s):  
Short Message Service ◽  
Security System ◽  
Advanced Encryption Standard ◽  
Short Message ◽  
Message Content ◽  
Safety Level ◽  
Avalanche Effect ◽  
Aes Algorithm ◽  
Encryption And Decryption ◽  
Message Service

Short Message Service (SMS) is working on a wireless network that allows the theft of the message contents. There are risks that could threaten the security of the contents of the message on SMS services, including SMS snooping, and SMS interception. Therefore, it takes security system messages on SMS services to maintain the security and integrity of the message content to cover the security messages. Algorithms Advanced Encryption Standard (AES) using a structure SPN (Substitution Permutation Network) structure, which has the disadvantage of encryption and decryption, so the safety level is low. To cover the security hole of these weaknesses, the researchers conducted the improvement of Advanced Encryption Standard (AES) algorithm security system based on android SMS using Vigenere algorithm, so that the level of security and integrity of the content of the short message becomes higher and difficult to solve. The results showed an average increase in percentage value of the avalanche effect from 37.24% to 42.96%. Keywords—Advanced Encryption Standard, android, message security, encryption.

Performance Evaluation of Selected Encryption Algorithms

2021 ◽  
Vol 10 (2) ◽  
pp. 21-30
Author(s):  
Ahmida ABIODUN ◽  
Olanrewaju LAWAL ◽  
Oyediran OYEBIYI ◽  
Odiete JOSEPH ◽  
Adeyemi ADETORO
Keyword(s):  
Data Security ◽  
Hybrid Algorithm ◽  
Process Time ◽  
Advanced Encryption Standard ◽  
Algorithm Performance ◽  
Aes Algorithm ◽  
Encryption And Decryption ◽  
Sequential Combination ◽  
Encryption Algorithms ◽  
Exclusive Or

Data security is a key aspect of today’s communication trend and growth. Various mechanisms have been developed to achieve this security. One is cryptography, which represents a most effective method of enhancing security and confidentiality of data. In this work, a hybrid based 136bit key algorithm involving a sequential combination of XOR (Exclusive –Or) encryption and AES (Advanced Encryption Standard) algorithm to enhance the security strength is developed. The hybrid algorithm performance is matched with XOR encryption and AES algorithm using encryption and decryption time, throughput of encryption, space complexity and CPU process time.

scholarly journals New security approach-based Steganography and Cryptography by modified AES algorithm

2021 ◽  
Vol 10 (1) ◽  
pp. 214-220
Keyword(s):  
Information Transmission ◽  
Advanced Encryption Standard ◽  
Discrete Wavelet ◽  
Least Significant Bit ◽  
Aes Algorithm ◽  
Transmission Of Information ◽  
Low Pass ◽  
Lsb Technique ◽  
Picture Signal ◽  
Modified Aes

The transmission of information through any channel of correspondence needs solid encryption procedures with the end goal of information security. The computerized watermarking assumes a significant part in inserting data into an advanced picture signal, for the check and character of its proprietors. In discrete wavelet change, "investigation channel bank" can be utilized for dissecting picture signals by going through. The channel bank comprises high and low pass channels at every deterioration stage. In this paper, a technique to consolidate steganography (Least Significant Method-LSM) and cryptography Advanced Encryption Standard (AES) is thought to give a safer method to information transmission through any unstable or public organizations. Prior to inserting the content in the picture, the text is scrambled utilizing AES calculation. Utilizing least significant bit (LSB) strategy, encoded the text installed in low-low (LL) subband wavelet decayed of a picture. Converse wavelet changes applied will lead to the output picture is communicated to the recipient. Presently at the collector's end, the picture changed utilizing wavelet and encoded text will be extricated by utilizing the LSB technique. This paper shows how AES calculation is utilized in the decoding of the outcome.

scholarly journals Development of Cybersecurity Technology and Algorithm Based on Quantum Computing

2021 ◽  
Vol 11 (19) ◽  
pp. 9085
Author(s):  
Kyung-Kyu Ko ◽  
Eun-Sung Jung
Keyword(s):  
Performance Evaluation ◽  
Quantum Computing ◽  
Random Walk ◽  
Advanced Encryption Standard ◽  
Quantum Random Walk ◽  
Change Rate ◽  
Aes Algorithm ◽  
Encryption And Decryption ◽  
Encryption Algorithms ◽  
Encryption Decryption

Many hacking incidents are linked to work files because most companies work with them. However, a variety of file encryption and decryption methods have been proposed. Existing file encryption/decryption technologies are under threat as hacking technologies advance, necessitating the development of stronger encryption algorithms. Therefore, in this study, we propose a modified advanced encryption standard (AES) algorithm and use quantum computing to encrypt/decrypt AES image files. Because the shift is regular during the AES Shift Row procedure, the change technique led the shift to become irregular when using quantum random walk. Computing resources and speeds were simulated using IBM Qiskit quantum simulators for performance evaluation, whereas encryption performance was assessed using number of pixels change rate (NPCR) and unified average changing intensity (UACI).

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