A system and method for providing a customized on-line shopping interface and/or manufacturing is disclosed. The system uses customer's computer, location, URL, IP address, email domain, embedded promotion code, or other predetermined criteria to provide special product offerings and pricing for a particular class or subclass of customers. If an unauthorized user attempts to access the system, a series of screens containing non-customized pricing is presented to the intruder so as not to alert the intruder that he or she has reached the restricted content. Based on the authentication information, automated manufacturing processes and equipment may be utilized to produce the customized products.