7 results for “Modular Arithmetic”

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Research ArticleOpen accessPhrase 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 PDF Cite

Research ArticleOpen accessEvery word in the titleGroup Re-keying Protocol Based on Modular Polynomial Arithmetic Over Galois Field GF(2n)Sundaram Sudha, Azman Samsudin, Mohammad Ahmad AliaProblem statement: In this study we propose a group re-keying protocol based on modular polynomial arithmetic over Galois Field GF(2n). Common secure group communications requires encryption/decryption for group re-keying process, especially when a group member is leaving the group. Approach: This study proposes secret keys multiplication protocol based on modular polynomial arithmetic (SKMP), which eliminates the need for the encryption/decryption … …American Journal of Applied Sciences, Vol. 6, Issue 9 · 30 Sep 2009 · 7,165 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsA Block Cipher Using Linear CongruencesV. U.K. Sastry, V. JanakiWe have developed a block cipher by using modular arithmetic inverse and linear congruences. The cipher contains a key matrix called the outer key. It also includes another key, which contains a set of constants involved in the linear congruences. This key is called as inner key. The cryptanalysis carried out in this paper indicates that the cipher cannot be … …Journal of Computer Science, Vol. 3, Issue 7 · 31 Jul 2007 · 7,013 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsCrypto-Watermarking of Images based on the Permutation on Z/pZ and the Wavelet Decompositions of Legall 5/3Younes Benlcouiri, Moulay Chrif Ismaili, Abdelmalek Azizi, Mohammed BenabdellahIn this work, we are interested in the insertion of the watermarking of digital images in the frequency domain. The algorithm proposed uses the transformed into wavelet Legall 5/3 on an image encrypted by swapping on the Z/pZ field, to perform the watermarking. By consequence, this introduces the concept of keys to the traditional methods of non-blind watermarking. The results … …Journal of Computer Science, Vol. 15, Issue 6 · 26 Jun 2019 · 7,451 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsModified Hill Cipher for a Large Block of Plaintext with Interlacing and IterationV. U.K. Sastry, N. R. ShankarIn this research, we have developed a large block cipher by modifying the Hill cipher. In this, we have introduced interlacing of the binary bits of the plaintext as the primary concept leading to confusion. This process is strengthened by using iteration. The cryptanalysis and avalanche effect mentioned in this research clearly exhibit the strength of the cipher. …Journal of Computer Science, Vol. 4, Issue 1 · 31 Jan 2008 · 7,150 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsModified Hill Cipher with Interlacing and IterationV. U.K.. Sastry, N. Ravi ShankarIn this research, we have developed a block cipher by taking a large key matrix of size nxn and a plaintext matrix containing n rows and two columns. In this, the plaintext column vectors, perated by the key matrix are thoroughly interlaced at each stage of the iteration. As a typical example, we have taken the key in the form … …Journal of Computer Science, Vol. 3, Issue 11 · 30 Nov 2007 · 7,353 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsModified Hill Cipher with Key Dependent Permutation and Circular RotationV.U.K. Sastry, V. JanakiIn this study, we have modified the Hill cipher, by including a permutation and circular rotation into the cipher. Here both the permutation and the rotation depend upon the key. From the cryptanalysis and the avalanche effect, discussed in this study, we notice that the strength of the cipher is significant. …Journal of Computer Science, Vol. 3, Issue 9 · 30 Sep 2007 · 6,518 accessesView PDF Cite