@article{MAKHILLJEAS201914417462,
    title = {New Cryptographic System of Romanized Arabic Text Based on Modified Playfiar},
    journal = {Journal of Engineering and Applied Sciences},
    volume = {14},
    number = {4},
    pages = {1331-1338},
    year = {2019},
    issn = {1816-949x},
    doi = {jeasci.2019.1331.1338},
    url = {https://makhillpublications.co/view-article.php?issn=1816-949x&doi=jeasci.2019.1331.1338},
    author = {Inas R.,Noor D. Al-,Enaam Hadi,Dhamyaa A. Al-,Huda F. Al- and},
    keywords = {Romanizing system,cryptographic,ciphertext,key generation,randomness,unicode,Knight tour},
    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.}
    }