QDP Authentication System Over Kerberos

In these days, password security is one of major part of security problems. With reference to the memory ability of human´s memory and the previous solution proposed over the text password, we can find graphical password as one of the best solution in this way. On the other hand, parallel by graphical password, query direct password (QDP) is one of the major studies in password security. As, Kerberos is one of main base of many systems in this part, we propose a methodology for implement the query direct password (QDP) over the Kerberos. In this paper at first we explain the text password and memory ability problem then try to explain the graphical password and its problem. Before we explain the Kerberos, firstly we go to the query direct password deeply and then explain Kerberos structure. Finally we will explain our proposed algorithm.