Pre-Grant Publication Number: 20080177799
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Prior Art Detail
Summary / Description
| Summary / Description | A document security system for securely printing documents that are uniquely marked on each page of ordinary or specialized paper with a security mark such that copying and or alteration is prevented, the security mark comprising information relating to the document and further being unique to each page having specific information relating to each page of the document. |
Basic Information
| Type of Prior Art | Issued Patents - US |
| Country | United States of America |
| Patent/Application # | US20040080777A1 |
| Kind Code | United States (US) - United STATES Patent - A |
| Patentee Name | Smith, Wendell M.; Smith's Parish, Bermuda |
| Relevant Pages, Columns, or Lines | [0012], [0013], [0014], [0015] |
| URL | |
| Filing Date | August 6, 2003 |
| Additional Information | |
Notes / To Do
| Notes | |
Excerpt
Excerpt [0012] Therefore, what is desired is a document security system that will watermark each page as it prints so as to indicate whether unauthorized printing, alteration or duplication of a document has occurred. The watermark being provided such that it cannot be accurately copied or counterfeited, and containing machine readable encoded data unique to each page.
[0015] .... a security encryption/certification is carried through to print the file. The printed pages are marked with a security marking ("a watermark"0 that uniquely identifies that particular authentic page of the printed document.
[0018] ... The mark may be measurably, probably unique to that document and even to that particular page of the printed document. ... |
Relevance
Claims
1
A document integrity verification method comprising:
receiving an image format document representing a printed document, wherein the image format document represents a printed document containing a first original integrity verification code (IVC);
generating a first verification data sequence from the image format document, wherein generating a first verification data sequence comprises performing an optical character recognition (OCR) process on the image format document;
generating a first modified verification data sequence from the first verification data sequence in accordance with a set of modification rules, wherein at least one element of the first verification data sequence, between the first and final elements of the first verification data sequence, is modified in the first modified verification data sequence;
generating a first verification IVC, wherein generating a first verification IVC comprises performing a one-way operation on the first modified verification data sequence;
comparing the first verification IVC with the first original IVC; and
reporting an indication of tampering to the printed document, responsive to the comparison of the first verification IVC with the first original IVC.
Relevance
A 'watermark' described as a security marking is disclosed that identifies each particular page.
A 'watermark' described as a security marking is disclosed that identifies each particular page.
Claim Chart
All
