1. A method of securely duplicating in a copying machine a document that includes a readable security device, the method comprising: reading the readable security device to determine contents of the readable security device; copying the document; generating a copy of the readable security device that includes data which is determined from the contents of the readable security device and that includes a distinct identification number to indicate a copy number of the document; attaching the copy of the readable security device to the copy of the document before the copy of the document exits the copying machine to generate a secure duplicate of the document; and storing information regarding the copying of the readable security device to provide a trace of each copy of the document and any copies of the copy of the document.