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Research ArticleOpen accessEvery word in the titleA Novel Enhancement Technique of the Hill Cipher for Effective Cryptographic PurposesA. F.A. Abidin, O. Y. Chuan, M. R.K. AriffinProblem statement: The Hill cipher is the first polygraph cipher which has a few advantages in data encryption. However, it is vulnerable to known plaintext attack. Besides, an invertible key matrix is needed for decryption. It may become problematic since an invertible key matrix does not always exist. Approach: In this study, a robust Hill algorithm (Hill++) has been proposed. … …Journal of Computer Science, Vol. 7, Issue 5 · 7 May 2011 · 8,545 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleAttack of Against Simplified Data Encryption Standard Cipher System Using Neural NetworksKhaled M. Alallayah, Waiel F. Abd El-Wahed, Mohamed Amin, Alaa H. AlhamamiProblem statement: The problem in cryptanalysis can be described as an unknown and the neural networks are ideal tools for black-box system identification. In this study, a mathematical black-box model is developed and system identification techniques are combined with adaptive system techniques, to construct the Neuro-Identifier. Approach: The Neuro-Identifier was discussed as a black-box model to attack the target cipher … …Journal of Computer Science, Vol. 6, Issue 1 · 31 Jan 2010 · 7,941 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleDSP-128:Stream Cipher Based On Discrete Log Problem And Polynomial ArithmeticKhaled M. Suwais, Azman SamsudinDSP-128 is a new multithreaded stream cipher based on the intractability of the Discrete Logarithm Problem (DLP) with key size of 128-bit. The design of DSP-128 is divided into three stages: Initialization Stage, Keystream Generation Stage, and Encryption Stage. The design goal of DSP-128 is to come up with a secure stream cipher with good performance for data encryption. The … …American Journal of Applied Sciences, Vol. 5, Issue 7 · 31 Jul 2008 · 7,396 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleA Block Cipher using Feistal's Approach Involving Permutation and Mixing of the Plaintext and the Additive Inverse of Key MatrixAruna Varanasi, S. U. KumarIn this research, we have developed a block cipher for a block of size 112 bits by using an iterative method involving a permutation of the plaintext and the subkeys generated in each iteration. Here we have represented the plaintext as a matrix of f size 14×8, comprising binary bits. In the process of encryption, we have used a key … …Journal of Computer Science, Vol. 4, Issue 2 · 28 Feb 2008 · 7,109 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleGenetic Algorithm and Tabu Search Attack on the Mono-Alphabetic Substitution Cipher in Adhoc NetworksA. K. Verma, Mayank Dave, R. C. JoshiWith exponential growth of networked system and application such as e-Commerce, the demand for effective Internet security is increasing. Cryptology is the science and study of systems for secret communication. In consists of two complementary fields of study: cryptography and cryptanalysis. This study presents a cryptanalysis method based on Genetic Algorithm and Tabu Search to break a Mono-Alphabetic Substitution Cipher … …Journal of Computer Science, Vol. 3, Issue 3 · 31 Mar 2007 · 7,254 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleA Large Block Cipher Using Modular Arithmetic Inverse of a Key Matrix and Mixing of the Key Matrix and the PlaintextV. U.K. Sastry, S. Udaya Kumar, A. Vinaya babuIn this paper, we have developed a block cipher by applying an iterative method. In the process of encryption, we have used a key matrix (K) in which all the elements are binary bits. In the process of decryption, we have utilized the modular arithmetic inverse (K-1). In the process of encryption, the elements of the plaintext and the elements … …Journal of Computer Science, Vol. 2, Issue 9 · 30 Sep 2006 · 6,796 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleNew Directions in Cryptanalysis of Block CiphersDavood RezaeiPour, Mohamad Rushdan Md SaidProblem statement: The algebraic expression of the Advanced Encryption Standard (AES) RIJNDAEL S-box involved only 9 terms. The selected mapping for RIJNDAEL S-box has a simple algebraic expression. This enables algebraic manipulations which can be used to mount interpolation attack. Approach: The interpolation attack was introduced as a cryptanalytic attack against block ciphers. This attack is useful for cryptanalysis using … …Journal of Computer Science, Vol. 5, Issue 12 · 31 Dec 2009 · 7,026 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleRandomness Analysis of DES Ciphers Produced with Various Dynamic ArrangementsMalik Qasaimeh, Raad S. Al-QassasOver the past few years, researchers have devoted efforts to enhance the original DES encryption algorithm. These enhancements focus on improving multiple perspectives of the algorithm through enhancing its internal components to deliver a robust DES variant against different kinds of typical attacks such as linear and differential crypto analysis, in addition to the newly evolved attacks such as differential … …Journal of Computer Science, Vol. 13, Issue 12 · 15 Dec 2017 · 7,161 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleCCMP Advanced Encryption Standard Cipher For Wireless Local Area Network (IEEE 802.11i): A Comparison with DES and RSAR. Velayutham, D. ManimegalaiThe comparative analysis of the renowned cryptographic algorithms AES, DES and RSA. The Rijndael algorithm was adapted as Advanced Encryption Standard (AES) algorithm, to Data Encryption algorithm (DES), which have been in the security standards since long time. The comparative analysis is implemented in IEEE 802.11i wireless platform. Compared to DES, AES contains CCMP which is a security standard that … …Journal of Computer Science, Vol. 11, Issue 2 · 26 Aug 2014 · 8,602 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleBlock Cipher Involving Key Based Random Interlacing and Key Based Random DecompositionK. Anup Kumar, V. U.K. SastryProblem statement: The strength of the block ciphers depend on the degree of confusion and diffusion induced in the cipher. Most of the transformations used for this purpose are well known to every one and can be broken by a crypt analyzer. Therefore, in order to counter attack the crypt analyzer, there is a need for better transformations in addition … …Journal of Computer Science, Vol. 6, Issue 2 · 28 Feb 2010 · 7,004 accessesView PDFCite