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Document modification detecting method, original document manuscript providing device, duplicated document detecting device, and document modification detection system

A detection method and copy technology, applied to computer parts, record carriers used by machines, instruments, etc., can solve problems such as not being able to store all in two-dimensional codes, and long-term key content

Inactive Publication Date: 2016-10-19
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] 3) When there are many key contents, it is impossible to store all of them in the QR code

Method used

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  • Document modification detecting method, original document manuscript providing device, duplicated document detecting device, and document modification detection system
  • Document modification detecting method, original document manuscript providing device, duplicated document detecting device, and document modification detection system
  • Document modification detecting method, original document manuscript providing device, duplicated document detecting device, and document modification detection system

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Embodiment Construction

[0029] figure 1 A document original and a copy of a document in the embodiment of the present invention are illustrated. Document originals generally contain characters, such as numeric characters or text characters. The copy of the document may be maliciously tampered with, figure 1 One of the cases is shown, that is, the contract amount is revised in the copy of the document original. Through the document modification detection method of the present invention, such modification can be detected and the position of the modified character can be determined.

[0030] The document modification detection method of the present invention will be specifically described below through specific implementation manners with reference to the accompanying drawings.

[0031] figure 2 A flowchart illustrating a document modification detection method according to an embodiment of the present invention.

[0032] Such as figure 2 As shown, in step S11, the copy of the original document w...

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Abstract

The invention relates to a document modification detecting method, an original document manuscript providing device, a duplicated document detecting device, and a document modification detection system. The document modification detecting method is used for detecting whether a duplicated document is modified relative to an original manuscript of the document, wherein the original manuscript includes a two-dimensional code including feature information of the document. The document modification detecting method comprises: scanning the duplicated document; reading the feature information in the two-dimensional code from the duplicated document; obtaining quadratic feature information, corresponding to the feature information, of the duplicated document; and comparing the feature information with the corresponding quadratic feature information to determine whether character modification exists in the duplicated document.

Description

technical field [0001] The invention relates to a document modification detection method, a document modification detection method, a document original manuscript providing device, a document copy detection device, and a document modification detection system. In particular, it relates to a method capable of checking out human-made modification of characters in a document. Background technique [0002] Documents such as contract texts and certificates and certificates issued by various authorities are often at risk of being tampered with and forged. Malicious users defraud a third party with a forged or tampered certification document, which will not only cause the third party to suffer deception and economic losses, but also cause a major blow to the authority and reputation of the certification document issuing institution. [0003] At present, the anti-tampering technology of paper documents on the market is roughly divided into several categories such as "special paper,...

Claims

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Application Information

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IPC IPC(8): G06K9/46G06K19/06
Inventor 彭利曹永刚
Owner RICOH KK