To secure the information in the World Wide Web, websites ask users to create their own login identification andpassword, where in general a password is a simple string of characters. To make the information more secure, an access code of anarray of alphanumeric and special characters can be generated by using a Petri net model. A string language can be generated bylabelling transitions of a Petri net. Similarly two dimensional array languages can also be generated by Petri nets. Coloured Petrinet has also been defined to generate array language. This kind of access would be a three factor authentication. In this paper wepropose and develop the application of array generating Petri net to enhance information security.
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