Electronic data management system and method

Details Electronic data management system and method Electronic data management system and method

2007-01-09

2007-01-09

Louis-Jacques, Jacques (Department: 2134)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C380S054000, C382S103000, C382S141000, C705S028000

Reexamination Certificate

active

09754376

ABSTRACT:
An electronic data management system for accurately determining the authenticity of the electronic data and the specification of the source of unauthenticated electronic data. A drawing output processor transmits original electronic drawing data A1to an order receiving unit with a tag T attached. The order receiving unit and a manufacturing unit transmit a manufacturer's copied data B2(T) copied from the original data A1(T) to an inspection unit. The inspection unit transmits the inspection result Fa for the product M, the client's copied data A2re-copied from the original data A1, and the manufacturer's copied data B2(T) to a determination unit. The determination unit compares the tag T extracted from the manufacturer's copied data B2with the original value of the client's copied data A2and the original value of the manufacturer's copied data B2and determines the authenticity of the client's copied data A2and the manufacturer's copied data B2.

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“A Watermark for Image Integrity and Ownership Verification” by Ping Wah Wong, IS&T's 1998 PICS Conference, May 17, 1998, pp. 374-379.

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