Importance

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Abstract

A method is described for creating an authenticated, verifiable reproduction of an electronic document. A master document is first created in a first format, and a DACm is created and linked to or stored with the master document. The master document is then opened and the DAC of the opened document is verified. If the DAC of the opened document is equal to DACm, the reproduction can proceed. The master document is then converted or reproduced into a format different from the first format to make a reproduced document. A DACr is created for the reproduced document, and DACm and DACr are either embedded into the reproduced document or stored in a linked storage system. Accordingly, two different versions of the master document exist, but each can be verified and authenticated separately. The method of the present invention provides for increased security in an environment where electronic documents can be created in one format and converted into another format.

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First Claim