Verifying the veracity and creator of a printed document
First Claim
1. A method comprising:
- encrypting pertinent information extracted from a document;
reducing the encrypted pertinent information to a verification mark; and
appending the verification mark to the document.
2 Assignments
0 Petitions
Accused Products
Abstract
A technique for identifying whether information in an original document has been altered in a copy thereof is described. A creator identifies the pertinent information in an original document, where the pertinent information may include image and text information. This pertinent information is encrypted and reduced to a verification mark such which is added to the original document. The pertinent information can be compressed prior to encryption. A verifying party receives a copy of the document along with an appended verification mark. The verification mark is decrypted and the information contained in the verification mark is reproduced and compared with the information contained in the copy. Any discrepancy between information contained in the verification mark, which is known to be true, with information in the copy indicates that the copy may have been altered.
38 Citations
29 Claims
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1. A method comprising:
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encrypting pertinent information extracted from a document;
reducing the encrypted pertinent information to a verification mark; and
appending the verification mark to the document. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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receiving a first document and a verification mark derived from encrypted information obtained from the first document;
reducing the first document and the verification mark to a computer readable format;
decrypting the encrypted information;
creating a second document from the decrypted pertinent information; and
comparing the first and second documents. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 24, 26, 28)
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21. One or more computer-readable media containing computer program instructions comprising instructions for:
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receiving a document that includes image and text fields;
identifying pertinent image and text fields in the document;
encrypting the pertinent image and text fields;
creating a verification mark based on the pertinent image and text fields; and
appending the verification mark to the document.
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23. One or more computer-readable media containing computer program instructions comprising instructions for:
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creating a computer readable version of a hard copy of a document appended with a verification mark that contains encrypted information;
decrypting the encrypted information contain in the verification mark;
creating a document based on the decrypted information; and
comparing the computer readable version with the created document based on the decrypted information.
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25. A computing device comprising:
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a processor;
a memory to store a document;
a document verification application module stored in memory executable on the processor to identify image and text fields of the document;
a cryptographic engine module stored in memory executable on the processor used to encrypt the identified image and text fields; and
a verification mark generator module stored in memory executable on the processor used to create a verification mark.
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27. A computing device comprising:
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a processor;
a memory;
a verification mark reader module stored in the memory executable on the processor to read a verification mark that is part of a document;
a cryptographic engine module stored in the memory executable on the processor to decrypt the verification mark; and
a document verification module stored in the memory executable on the processor to create a document based on information contained in the verification mark.
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29. A system comprising
a creation device to create a protected document that includes a verification mark, wherein the verification mark comprises pertinent information fields of an original document; - and
a verification device to scan the protected document and the verification mark, wherein the verification mark is used to recreate a document based on the pertinent information and the recreated document is compared with the scanned protected document.
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Specification