Michael M Kangethe^1,, Elisha Odira Abade¹

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.

encryption, decryption, ascii, strings, plain text, cipher text, multi dimension, hex, non-deterministic, random selection, text cipher, key chart, IV (Initialization Vector), XY (Horizontal/Row, Vertical/Column)