Authors : Inas R. Shareef, Noor D. Al- Shakarchy, Enaam Hadi Abd, Dhamyaa A. Al- Nasrawi, Huda F. Al- Shahad and Hiba J. Aleqabie
Abstract: One of the most spoken language in the world today is Arabic language. The other hand the development of applied e-Government in most fields, required using of internet, many treatments may be in Arabic language. The most critical challenge is to achieve a sufficient level of security and prevent unauthorized users from acknowledged on important information during transmission of data. The researches of encryption and decryption Arabic languages can be considered few and old. In this study, new method was proposed consist of three major steps: firstly, romanize Arabic text that mean convert from Arabic alphabet to Latin alphabet. Secondly, the rominized text encrypted/decrypted with modified Playfair cipher using 6×8 matrix and unicode. The encryption/decryption implemented by generating Knight tour key. Finally, Deromanizing process to get Arabic plain text. The proposed system was evaluated by (statistical characteristics, frequency test and serial test and entropy). The experimental results proved that the romanizing process provide the confusion and diffusion concepts which are the goal of any cipher system. These concepts supply the randomness of ciphertext and make system more robust against any third parity.
Inas R. Shareef, Noor D. Al- Shakarchy, Enaam Hadi Abd, Dhamyaa A. Al- Nasrawi, Huda F. Al- Shahad and Hiba J. Aleqabie, 2019. New Cryptographic System of Romanized Arabic Text Based on Modified Playfiar. Journal of Engineering and Applied Sciences, 14: 1331-1338.