Image forming apparatus and computer-readable storage medium for computer program

A computer-readable storage medium storing thereon a computer program used in a computer provided in an image forming apparatus for performing an image-related process, the computer program causing the image forming apparatus to implement:

• a first authentication portion that performs a first authentication process on a user who is to log onto the image forming apparatus;
• a second authentication portion that performs a second authentication process on the user successfully authenticated by the first authentication portion, and thereby determines whether or not the user is permitted to log onto the image forming apparatus;
• a first authentication information storage portion that stores therein first authentication information used for the first authentication process performed by the first authentication portion;
• a second authentication information storage portion that stores therein second authentication information used for the second authentication process performed by the second authentication portion;
• an associated information storage portion that stores therein associated information for associating the first authentication information with the second authentication information;
• and
• a cooperative setting portion that performs setting therethrough, on a user-by-user basis, whether or not the first authentication process and the second authentication process are performed in combination with each other,
• wherein, if the user for whom setting is performed such that the first authentication process and the second authentication process are performed in combination with each other is successfully authenticated by the first authentication portion, then the image forming apparatus is caused to determine that the user is to be permitted to log onto the image forming apparatus based on the associated information and end the second authentication process, and, if the user for whom setting is performed such that the first authentication process and the second authentication process are not performed in combination with each other is successfully authenticated by the first authentication portion, then the image forming apparatus is caused to perform the second authentication process on said user not based on the associated information.