%0 Journal Article %T The Hush Cryptosystem %A Sari Haj Hussein %J Computer Science %D 2012 %I arXiv %R 10.1145/1626195.1626224 %X 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. %U http://arxiv.org/abs/1205.3021v1