Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
1998-01-02
2001-07-24
Hong, Stephen S. (Department: 2176)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000
Reexamination Certificate
active
06266680
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method for electronically checking documents as to their authenticity. Particularly the present invention relates to a method for electronically checking documents as to their authenticity, in which an official seal is not put on the document, but the document itself shows to be notarized, and the authenticity of a document can be electronically confirmed.
2. Description of the Prior Art
Notarization refers to the fact that the content of the document is same as the content of the original document, and the document is issued by the organization which has issued the original document. Conventionally, notarization is executed in such a manner that a document transmitted from a remote place, or a document printed by a printer is attached with a paper of special format on which an official seal is stamped by the notarizing organization, thereby proving the notarization.
However, in accordance with the progress of the copying technique, the above described conventional notarizing method has become unreliable because the notarization itself can be copied. Thus there can be involved fraudulence and forgery. Further, in the conventional notarizing method, there is a disadvantage that the notarizing organization has to be visited however remotely it may be located.
SUMMARY OF THE INVENTION
The present invention is intended to overcome the above described disadvantages of the conventional technique.
Therefore it is an object of the present invention to provide a method for electronically checking documents as to their authenticity, in which an official seal is not put on the document, but the document itself shows to be notarized, and the authenticity of the document can be electronically confirmed.
In achieving the above object, the method for electronically checking authenticity of documents according to the present invention includes the steps of: forming a document with an electronically authenticity-checking format to indicate that a document has been notarized without using an official seal (first step); and determining whether the document with the electronically authenticity-checking format has been notarized (second step) to
The first step includes the steps of: forming a bit map image for the document to be electronically notarized, and using a rectangular mask to inspect the information of the bit map in a certain direction, so as to form a total image information consisting of a series of bit streams of; applying a hash function to the total image information consisting of bit streams to form a hash value as a unique value for the total image information; storing a serial number of the document and the hash value into a data base (13th step); judging as to whether a notarization should be conformed by on-line or off-line; encrypting the hash value by using a customary encrypting method in a case where on-line confirmation has been adopted as a result of the, and using an opening key encrypting method in a case where the off-line method has been selected; and forming a document with an electronically authenticity-checking format including the serial number of the document, the hash value and the encrypted hash value, and outputting the document
The second step includes the steps of: receiving a document to be confirmed from among documents with electrically authenticity-checking format of the first step; locating an inspection start point at a left position of the document, and receiving a document-related information from a top right position of the document; inspecting an actual document by using a mask having the same size as that of the document based on the document-related information, and converting the image information into bit streams; forming a hash value for the bit streams by using a hash function; obtaining an encrypted hash value at a line next to an inspection end point; determining whether the document is to be inspected by on-line or not, so as to use an encrypting key same as that of the customary encrypting method in a case where an on-line inspection is executed, and so as to decode the encrypted hash value by using the opening key in a case where an off-line inspection is executed; and comparing the hash value for the bit streams with the encrypted hash value decoded, and notifying to a user an authenticity of the document if the two values correspond with each other.
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Cho Hyeon Sung
Cho Hyun Kyu
Ham Ho Sang
Lee Kyeong Ho
Song Byoung Youl
Antonelli Terry Stout & Kraus LLP
Electronics and Telecommunications Research Institute
Hong Stephen S.
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