Patent ID: 6751632
Filing Date: 2004-06-15
Classification: G06F,Y10S

Abstract:
A method of creating an authenticated verifiable electronic reproduction of an electronic master document while preserving the integrity and authenticity of said master document and said reproduction said method comprising the steps of:(a) creating the master document under a first format; (b) creating a document authentication code (DACm) linked to the master document; (c) making the master document available to a user; (d) for securely reproducing the document, performing the sub-steps of: (i) opening the master document; (ii) creating a DACmo linked to the opened master document; (iii) retrieving DACm; (iv) comparing DACm to DACmo and proceeding to the following sub-step only if DACm is equal to DACmo; (v) reproducing the document in a format different from the first format to create a reproduced document; (vi) creating a DACr for the reproduced document; and (vii) linking DACm and DACr to the reproduced document.