Message decipher Introduction Cryptography is a field of science in which a sender encrypt information from outside world and then deliver through insecure medium. A person who work in secret intelligence, must share a his location with his friends so that they should complete their mission, or a person who know how to read ancient texts can protect information from some bad people. The prefix "crypt" means "hidden" or "vault" and the suffix "graphy" stands for "writing." Every writing system have one common property and that is "encoded message property". According to this property if you don't know how to read it then you don't know about key. For example I write a line another language and check whether this property satisfy my hypothesis.                                      علم  انسا ن کا اک رشتہ ئے This is a message which i need to understand. There are two possibilities to understand this message