a system and method for providing a customized on - line shopping interface and / or manufacturing is disclosed . the system uses customer &# 39 ; 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 .