Dihedral Cryptographic Technique

Abstract

        This paper focuses on a new  technique of cryptography in abstract  algebra. We first give the necessary review on  Dihedral group and cryptography .We definition a new alphabetic of  characters by  additive character “blank†,thus we have (27)  characters {26  letters and  “blank†},therefore we use  modular  27 instead 26 such that we use the reflection and rotation which exists in Dihedral group to change the arrange of vectors of characters in plain text.