During the period of his prophethood, the Prophet Muhammad used different methods and tactics in the battlefields before and during the battle in order to get access to secret information about his enemy, and avoid any harm to be inflicted by his enemies. These tactics which can be regarded as ‘secret languages’ consist of passwords, flag, coded language, sings on the cloths, foot trace, call to prayer, proclaiming God’s greatness (takbir), salutation etc. Using these secret languages and sings he managed to overcome his enemies, to avoid the harm to be inflicted by them and to spread Islam in a vast region. This was a success which was unprecedented in history