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Dhananjay S. Phatak, Qiang Tang, Alan T. Sherman, Warren D. Smith, Peter Ryan, † Kostas Kalpakis. 2014. DoubleMod and SingleMod: Simple Randomized Secret-Key Encryption with Bounded Homomorphicity

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Article

Dynamic Directional NxN Chart Based Text Based Substitution Cipher

1School of Computing and Informatics, University of Nairobi, Nairobi, Kenya


Journal of Computer Sciences and Applications. 2020, Vol. 8 No. 2, 56-61
DOI: 10.12691/jcsa-8-2-3
Copyright © 2020 Science and Education Publishing

Cite this paper:
Michael M Kangethe, Elisha Odira Abade. Dynamic Directional NxN Chart Based Text Based Substitution Cipher. Journal of Computer Sciences and Applications. 2020; 8(2):56-61. doi: 10.12691/jcsa-8-2-3.

Correspondence to: Michael  M Kangethe, School of Computing and Informatics, University of Nairobi, Nairobi, Kenya. Email: mich01mk@gmail.com

Abstract

The need for simple secure substitution encryption algorithms has risen due to complexities derived from current encryption algorithms, which over-complicate the process through many sub-processes and consume more space than necessary. This also creates the need for a secure string encryption approach that can also be applied using a simple pen and paper to encrypt and decrypt messages between each other. In this paper we present a technique based on a Non-Deterministic directional NxN chart-based encryption cipher as a solution to this problem. This will be achieved by using a 2-dimensional N by N chart as the key while using a dynamically selected directional approach to generate both the cipher and plain-text.

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