Enhace the security of password by fuzzy controller

In this paper we use fuzzy controller for enhancing the security of password. In our results, also we use fuzzy controller for preventing of dictionary attack. In this attack when eavesdropping want to find one password, regardless of the user ID, if the password is 6 digits, before eavesdropping want to creates a list of 6 digit number (000000 to 999999) and then apply the hash function to every number, it must pass from fuzzy controller because digits or data should convert to fuzzy data and eavesdropping cannot create a list of six digits (depending on the password length) and cannot apply the hash function to every number and also is not able to convert fuzzy data to digits or real data. The result of this procedure is raising password security.