Cryptanalysis of columnar transposition cipher with long keys

Lasry, George; Kopal, Nils; Wacker, Arno

doi:10.1080/01611194.2015.1087074

Cited by 12 publications

(7 citation statements)

References 4 publications

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“…Autokey cipher merupakan salah satu algoritma yang menerapkan teknik substitusi dan memiliki tingkat keamanan yang cukup baik dibanding dengan algoritma teknik substitusi lainnya, seperti caesar maupun viginere cipher [13]. Sedangkan, transposisi kolom merupakan algoritma kriptografi kunci simetris yang memiliki prinsip kerja dengan menggantikan posisi karakter yang akan disandikan tanpa mengganti atau merubah karakter tersebut [14]. Dalam penelitian ini, pendekatan Avalanche Effect digunakan sebagai alat ukur model super enkripsi yang diusulkan.…”

Section: Pendahuluanunclassified

Pengamanan Data melalui Model Super Enkripsi Autokey Cipher dan Transposisi Kolom

Fadlan¹,

Haryansyah²,

Rosmini³

2021

RESTI

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One of the essential instruments in the cyber era is data. Therefore, maintaining data security is an important thing to do. One way that can be done to maintain data security is through cryptography. In cryptography, two basic techniques are commonly used, namely substitution techniques and transposition techniques. One of the weaknesses of the basic cryptographic techniques is the lower level of data security. This study proposed a super encryption model in securing data by combining cryptographic algorithms with substitution techniques, i.e., autokey cipher and transposition, i.e., columnar transposition cipher. This study used the Avalanche Effect method as a measurement tool for the proposed super encryption model. The test results have shown that the proposed super encryption model can provide a better level of security. The avalanche effect test on the five data test shows that the average AE value of the proposed super encryption model is 30.76%. This value is higher than the single autokey cipher algorithm of 1.66% and column transposition with a value of 18.03%. Other results from the five data test have shown that the proposed model has a high level of accuracy of 100% in terms of the decryption process results, which is the same as the initial data before going through the encryption process.

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Section: Pendahuluanunclassified

Pengamanan Data melalui Model Super Enkripsi Autokey Cipher dan Transposisi Kolom

Fadlan¹,

Haryansyah²,

Rosmini³

2021

RESTI

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“…This method is not secure against ciphertext-only attack (COA). 54 Low complexity security algorithm (LSA) is a different data security research method. 55 The progress of the nodes is the first step.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Another major issue of data security in WSNs is that the existing data encryption approaches have either very high response time or high computational time. AES-HECC 54 has high computation time and EGASON 1 led to high response time. A new secure algorithm that will consume less computational time and less response time is introduced.…”

Section: Motivationmentioning

confidence: 99%

An efficient cryptographic technique using modified Diffie–Hellman in wireless sensor networks

Ali

Humaria

Ramzan

et al. 2020

International Journal of Distributed Sensor Networks

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In wireless sensor networks, the sensors transfer data through radio signals to a remote base station. Sensor nodes are used to sense environmental conditions such as temperature, strain, humidity, sound, vibration, and position. Data security is a major issue in wireless sensor networks since data travel over the naturally exposed wireless channel where malicious attackers may get access to critical information. The sensors in wireless sensor networks are resource-constrained devices whereas the existing data security approaches have complex security mechanisms with high computational and response times affecting the network lifetime. Furthermore, existing systems, such as secure efficient encryption algorithm, use the Diffie–Hellman approach for key generation and exchange; however, Diffie–Hellman is highly vulnerable to the man-in-the-middle attack. This article introduces a data security approach with less computational and response times based on a modified version of Diffie–Hellman. The Diffie–Hellman has been modified to secure it against attacks by generating a hash of each value that is transmitted over the network. The proposed approach has been analyzed for security against various attacks. Furthermore, it has also been analyzed in terms of encryption/decryption time, computation time, and key generation time for different sizes of data. The comparative analysis with the existing approaches shows that the proposed approach performs better in most of the cases.

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“…Then, the columns are permutated based on the key. The letters are read column by column to create the ciphertext [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Double or multiple columnar ciphers are used to improve the security of the single columnar cipher. The same key can be applied, or other keys are required in multiple rounds of the columnar cipher process [18]. Myszkowski is a variation of the columnar cipher with a key of repeated letters that are given the same order.…”

Section: Introductionmentioning

confidence: 99%

A Novel Secure Transposition Cipher Technique using Arbitrary Zigzag Patterns

Al-Kasasbeh¹

2022

IJACSA

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Symmetric cipher cryptography is an efficient technique for encrypting bits and letters to maintain secure communication and data confidentiality. Compared to asymmetric cipher cryptography, symmetric cipher has the speed advantage required for various real-time applications. Yet, with the distribution of micro-devices and the wider utilization of the Internet of Things (IoT) and Wireless Sensor Network (WSN), lightweight algorithms are required to operate on such devices.This paper proposes a symmetric cipher based on a scheme consisting of multiple zigzag patterns, a secret key of variable length, and block data of variable size. The proposed system uses transposition principles to generate various encryption patterns with a particular initial point over a grid. The total number of cells in the grid and its dimension are variable. Various patterns can be created for the same grid, leading to different outcomes on different grids. For a grid of n cells, a total of n! * (n-1!) total patterns can be generated. This information is encapsulated in the private key. Thus, the huge number of possible patterns and the variation of the grid size, which are kept hidden, maintain the security of the proposed technique. Moreover, variable padding can be used; two paddings with different lengths lead to a completely different output even with the same pattern and the same inputs, which improves the security of the proposed system.

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Cryptanalysis of columnar transposition cipher with long keys

Cited by 12 publications

References 4 publications

Pengamanan Data melalui Model Super Enkripsi Autokey Cipher dan Transposisi Kolom

Pengamanan Data melalui Model Super Enkripsi Autokey Cipher dan Transposisi Kolom

An efficient cryptographic technique using modified Diffie–Hellman in wireless sensor networks

A Novel Secure Transposition Cipher Technique using Arbitrary Zigzag Patterns

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