In this paper, 'Password Generating Tile Array Token Interval Timed Coloured Petri Nets' is proposed to create a secured password. The proposed method provides a new process of authentication for individuals to secure their password. In spite of using only alphabets and characters as a password, the web users can use tiles as their password, which has alphabets or characters on it. It provides a new security to protect the information and gives a big challenge for the hackers to identify the password. The main objective of this paper is 'to provide high security with low-computational cost'. The proposed password generating tile array token interval timed coloured Petri nets (PGTAITCPN) method provides low computational cost 45.6%, low latency 65.3% and high-security level 95.6% better performance when compared with the existing methods, such as MEAS and OTPT.