Relevant bibliographies by topics / Polyalphabetic substitution cipher

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters

Academic literature on the topic 'Polyalphabetic substitution cipher'

Author: Grafiati
Published: 4 June 2021
Last updated: 29 January 2023

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Journal articles on the topic "Polyalphabetic substitution cipher"

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Astuti, Lestari Fidi, Kiswara Agung Santoso, and Ahmad Kamsyakawuni. "PENGAMANAN POLYALPHABETIC DENGAN AFFINE CIPHER BERDASARKAN BARISAN FIBONACCI." Majalah Ilmiah Matematika dan Statistika 19, no. 2 (2019): 95. http://dx.doi.org/10.19184/mims.v19i2.17274.

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Affine cipher is a classic cryptographic algorithm substitution technique. Substitution technique is the encryption process for every character in the plaintext will be subtituted by another character. Affine cipher uses two types of keys. Each character of plaintext to be encrypted substituted by the same key. This research discusses about modify one of the key affine cipher, to produce a different key that will be substituted with each plaintext character. Key modifications are made by the Fibonacci sequence rules. This study also compares affine cipher and key modification affine cipher by finding corelation coeffiecient values. The results obtained from the comparison of the two algorithms, encryption that uses affine cipher key modification is better than affine cipher.
 Keywords: Cryptography, Affine Cipher, Fibonacci, Correlation Value
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Agustini, Siti, Weny Mistarika Rahmawati, and Muchamad Kurniawan. "Modified Vegenere Cipher to Enhance Data Security Using Monoalphabetic Cipher." International Journal of Artificial Intelligence & Robotics (IJAIR) 1, no. 1 (2019): 25. http://dx.doi.org/10.25139/ijair.v1i1.2029.

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The rapid progression of exchange data by public networks is important, especially in information security. We need to keep our information safe from attackers or intruders. Furthermore, information security becomes needed for us. Many kind cipher methods of cryptography are improved to secure information such as monoalphabetic cipher and polyalphabetic cipher. Cryptography makes readable messages becoming non-readable messages. One of the popular algorithms of a polyalphabetic cipher is Vigenere cipher. Vigenere cipher has been used for a long time, but this algorithm has weaknesses. The calculation of the encryption process is only involving additive cipher, it makes this algorithm vulnerability to attacker based on frequency analysis of the letter. The proposed method of this research is making Vigenere cipher more complex by combining monoalphabetic cipher and Vigenere cipher. One of the monoalphabetic ciphers is Affine cipher. Affine cipher has two steps in the encryption process that are an additive cipher and a multiplicative cipher. Our proposed method has been simulated with Matlab. We also tested the vulnerability of the result of encryption by Vigenere Analyzer and Analysis Monoalphabetic Substitution. It shows that our method overcomes the weakness of Vigenere Cipher. Vigenere cipher and Affine cipher are classical cryptography that has a simple algorithm of cryptography. By combining Vigenere cipher and Affine cipher will make a new method that more complex algorithm.
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Kartha, Ranju S., and Varghese Paul. "Polyalphabetic Substitution Cipher Using Multiple Random Table." International Journal of Computer Sciences and Engineering 6, no. 5 (2018): 51–58. http://dx.doi.org/10.26438/ijcse/v6i5.5158.

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Basheer, Ghusoon. "Application of Polyalphabetic Substitution Cipher using Genetic Algorithm." AL-Rafidain Journal of Computer Sciences and Mathematics 5, no. 1 (2008): 57–68. http://dx.doi.org/10.33899/csmj.2008.163949.

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Som, Sukalyan, and Sabyasachi Ghosh. "A Simple Algebraic Model based Polyalphabetic Substitution Cipher." International Journal of Computer Applications 39, no. 8 (2012): 53–56. http://dx.doi.org/10.5120/4844-7111.

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Ibraheem, Noor, and Mokhtar Hasan. "Combining Several Substitution Cipher Algorithms using Circular Queue Data Structure." Baghdad Science Journal 17, no. 4 (2020): 1320. http://dx.doi.org/10.21123/bsj.2020.17.4.1320.

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With the revolutionized expansion of the Internet, worldwide information increases the application of communication technology, and the rapid growth of significant data volume boosts the requirement to accomplish secure, robust, and confident techniques using various effective algorithms. Lots of algorithms and techniques are available for data security. This paper presents a cryptosystem that combines several Substitution Cipher Algorithms along with the Circular queue data structure. The two different substitution techniques are; Homophonic Substitution Cipher and Polyalphabetic Substitution Cipher in which they merged in a single circular queue with four different keys for each of them, which produces eight different outputs for every single incoming letter. The present work can be applied efficiently for personal information security and network communication security as well, and the time required for ciphering and deciphering a message is less than 0.1 sec.
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Clark, Andrew, and Ed Dawson. "A PARALLEL GENETIC ALGORITHM FOR CRYPTANALYSIS OF THE POLYALPHABETIC SUBSTITUTION CIPHER." Cryptologia 21, no. 2 (1997): 129–38. http://dx.doi.org/10.1080/0161-119791885850.

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Hoa, Nguyen Huu, Dang Quach Gia Binh, Do Yeong Kim, Young Namgoong та Si Choon Noh. "Vigenere 테이블을 이용한 3단계 다중 알파벳 치환 암호화 모델". Jouranl of Information and Security 22, № 3 (2022): 33–39. http://dx.doi.org/10.33778/kcsa.2022.22.3.033.

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Imam Riadi, Abdul Fadlil, and Fahmi Auliya Tsani. "Pengamanan Citra Digital Berbasis Kriptografi Menggunakan Algoritma Vigenere Cipher." JISKA (Jurnal Informatika Sunan Kalijaga) 7, no. 1 (2022): 33–45. http://dx.doi.org/10.14421/jiska.2022.7.1.33-45.

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Cryptography is one of the most popular methods in data security by making data very difficult to read or even unreadable. One of the well-known techniques or algorithms in cryptography is Vigenere Cipher. This classic algorithm is classified as a polyalphabetic substitution cipher-based algorithm. Therefore, this algorithm tends to only handle data in text form. By this research, a console-based application has been developed which is made from PHP programming language to be able to encrypt and decrypt digital image media using Vigenere Cipher. The encryption process is done by first converting a digital image into a base64 encoding format so that the encryption process can be carried out using the tabula recta containing the radix-64 letter arrangement used for base64 encoding. Conversely, the decryption process is carried out by restoring the encrypted file using radix-64 letters, so we get the image file in the base64 encoding format. Then, the image with the base64 encoding format is decoded into the original file. The encryption process took less than 0,2 seconds and 0.19 seconds for the decryption process and 33.34% for average file size addition on the encrypted file from the original file size. Testing on ten different images with different sizes and dimensions showed a 100% success rate which means this research was successfully carried out.
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Kravchenko, Oleksandr. "GENERAL TECHNOLOGY OF ENCRYPTION AND INTEGRATION OF DATA IN A PATTERN OF A PICTURE OF IMAGES THAT IS RESISTANT TO JPEG COMPRESSION." Bulletin of the National Technical University "KhPI". Series: Innovation researches in students’ scientific work, no. 2 (December 16, 2021): 22–28. http://dx.doi.org/10.20998/2220-4784.2021.02.04.

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The object of the thesis is the use of steganographic methods for organizing a covert communication channel in a public channel, providing resistance to lossy compression. The aim of the thesis is to develop an algorithm for embedding data into bitmap images that is resistant to JPEG compression and attacks on the container. In this thesis, the features of the JPEG algorithm are investigated, steganographic methods of information protection are analyzed, and a steganographic algorithm is designed that is resistant to JPEG compression and attacks on the container. Additional security is provided by the polyalphabetic substitution cipher and user secret key used to encrypt the original message. The algorithm was developed using the Python 3 programming language, the NumPy, SciPy, MatPlotLib libraries and the Jupyter Lab package. The task was completed using standard mathematical and statistical methods and tools of the high-level programming language Python 3.
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Dissertations / Theses on the topic "Polyalphabetic substitution cipher"

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Clark, Andrew J. "Optimisation heuristics for cryptology." Thesis, Queensland University of Technology, 1998. https://eprints.qut.edu.au/15777/1/Andrew_Clark_Thesis.pdf.

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The aim of the research presented in this thesis is to investigate the use of various optimisation heuristics in the fields of automated cryptanalysis and automated cryptographic function generation. These techniques were found to provide a successful method of automated cryptanalysis of a variety of the classical ciphers. Also, they were found to enhance existing fast correlation attacks on certain stream ciphers. A previously proposed attack of the knapsack cipher is shown to be flawed due to the absence of a suitable solution evaluation mechanism. Finally, a new approach for finding highly nonlinear Boolean functions is introduced.
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Clark, Andrew J. "Optimisation Heuristics for Cryptology." Queensland University of Technology, 1998. http://eprints.qut.edu.au/15777/.

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The aim of the research presented in this thesis is to investigate the use of various optimisation heuristics in the fields of automated cryptanalysis and automated cryptographic function generation. These techniques were found to provide a successful method of automated cryptanalysis of a variety of the classical ciphers. Also, they were found to enhance existing fast correlation attacks on certain stream ciphers. A previously proposed attack of the knapsack cipher is shown to be flawed due to the absence of a suitable solution evaluation mechanism. Finally, a new approach for finding highly nonlinear Boolean functions is introduced.
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Book chapters on the topic "Polyalphabetic substitution cipher"

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Varghese, Prabha Elizabeth, and Latha R. Nair. "Randomizing Vigenere Cipher in Polyalphabetic Substitution Scheme." In International Conference on Intelligent Computing and Smart Communication 2019. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0633-8_80.

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Salomon, David. "Polyalphabetic Substitution Ciphers." In Data Privacy and Security. Springer New York, 2003. http://dx.doi.org/10.1007/978-0-387-21707-9_4.

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Neuenschwander, Daniel. "1 Classical Polyalphabetic Substitution Ciphers." In Probabilistic and Statistical Methods in Cryptology. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-25942-8_2.

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"Polyalphabetic Substitution Ciphers." In The Mathematics of Secrets. Princeton University Press, 2018. http://dx.doi.org/10.2307/j.ctvc775xv.6.

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"Polyalphabetic Substitution Ciphers." In Cryptological Mathematics. American Mathematical Society, 2000. http://dx.doi.org/10.1090/clrm/016/02.

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"2. Polyalphabetic Substitution Ciphers." In The Mathematics of Secrets. Princeton University Press, 2017. http://dx.doi.org/10.1515/9781400885626-004.

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"2. Polyalphabetic Substitution Ciphers." In The Mathematics of Secrets. Princeton University Press, 2018. http://dx.doi.org/10.1515/9780691184555-004.

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You might also be interested in the extended bibliographies on the topic 'Polyalphabetic substitution cipher' for particular source types:
Journal articles
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