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Browse Prior Art Database

Watermark data-hiding for print out by printer firmware

IP.com Disclosure Number: IPCOM000014398D
Original Publication Date: 1999-Nov-01
Included in the Prior Art Database: 2003-Jun-19
Document File: 3 page(s) / 56K

Publishing Venue

IBM

Related People

Hisashi Suzuki: AUTHOR

Abstract

Disclosed is a printing method for print-out with invisible signature. This method can be protected the correspondence with the print-out and the electronic documented matter ,and can be prevented reliability of the print-out from the criminal falsify. The invisible signature that is embedded with "watermark" of print-out includes printer hardware identifier, print owner information, time of print and document information. The watermark is generated by printer driver of host, and rasterizer of printer firmware will combine it with print body image. First, operator inputs document information such as document ID and user name via printer driver. When rasterizer generates a page image, printer firmware acquires the document information, and requests printer hardware for printer hardware related information such as printer hardware identifier, time of print and page number by page. Printer firmware encrypts signature that includes both the document information and printer hardware related information, and embeds the signature by data-hiding method. And the rasterizer combines the signature with the print body for creation of the complete one page output image. Using scanner, the watermark embedded signature image can be extracted from every page from the print-outs, and the hidden information can be deciphered by using data-hiding method. By using this method, printed out material such as confidential document or official document, can be helped to keep the correspondence the print-out with the electronic documented matter and can be prevented from the following criminal situation A. Inadequate print out situation and inadequate document distribution by the characteristics of the electronic documented materials.

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Watermark data-hiding for print out by printer firmware

Disclosed is a printing method for print-out with invisible signature. This method can be protected the correspondence with the print-out and the electronic documented matter ,and can be prevented reliability of the print-out from the criminal falsify. The invisible signature that is embedded with "watermark" of print-out includes printer hardware identifier, print owner information, time of print and document information.

The watermark is generated by printer driver of host, and rasterizer of printer firmware will combine it with print body image. First, operator inputs document information such as document ID and user name via printer driver. When rasterizer generates a page image, printer firmware acquires the document information, and requests printer hardware for printer hardware related information such as printer hardware identifier, time of print and page number by page. Printer firmware encrypts signature that includes both the document information and printer hardware related information, and embeds the signature by data-hiding method. And the rasterizer combines the signature with the print body for creation of the complete one page output image. Using scanner, the watermark embedded signature image can be extracted from every page from the print-outs, and the hidden information can be deciphered by using data-hiding method.

By using this method, printed out material such as confidential document...