An on-line VBI printing system that includes one or more cryptographic
modules and a central database. The cryptographic modules are capable of
implementing a variety of required security standards. A client system
provides a user friendly GUI for facilitating the interface of the user
to the system. The GUI system includes wizards that help the user
step-by-step with processes of registration, logging into the system, and
printing the VBI. In one aspect, the invention describes an on-line
system for securely printing an advertisement on a VBI.