The Hush Cryptosystem

TL;DR

The Hush Cryptosystem is a novel method for hiding encrypted data within Arabic sentences, using grammatical substitution and Hidden Markov Models to deceive observer-supporting software.

Contribution

It introduces a new cryptosystem that employs grammatical substitution and Hidden Markov Models to conceal encrypted data in Arabic sentences.

Findings

Successfully hides encrypted data in Arabic sentences

Deceives observer-supporting software effectively

Passes statistical tests for data concealment

Abstract

In this paper we describe a new cryptosystem we call "The Hush Cryptosystem" for hiding encrypted data in innocent Arabic sentences. The main purpose of this cryptosystem is to fool observer-supporting software into thinking that the encrypted data is not encrypted at all. We employ a modified Word Substitution Method known as the Grammatical Substitution Method in our cryptosystem. We also make use of Hidden Markov Models. We test our cryptosystem using a computer program written in the Java Programming Language. Finally, we test the output of our cryptosystem using statistical tests.