Stream Cipher Based on Chaotic Maps

Information Security has still the aim of many agencies and organisations. They have great attention to cryptosystems to ensure the security of their information. So, scientists and researchers had proposed many cryptosystems and improve their performance via new methods and techniques. Most recent studies depended on the chaotic map with cipher systems which had gained most researchers to improve its security and robustness. The continued studies had mentioned several methods to strength these chaotic based ciphers and the randomness of its keystream generation. Some of the studies had proposed successful cipher techniques while others had not or advised further improvement. Another side, this paper tests chaotic maps which had used in the cipher algorithms to evaluate its randomness. In general, this paper gives a review of recent stream cipher based on chaotic maps. It also shows the randomness evaluation of chaotic maps. The survey recommended that Chen map is the most random method.