Document distribution method and document management method
First Claim
1. A method of distributing a structured document in which identifiers are respectively set for a plurality of information items in document data made of digitized data including text data, image data, music data, and/or other digitized data, and information content of each information item is enclosed in each respective identifier, the method comprising:
- (A) a step of creating access control information necessary to access the document data and separating the access control information into a first access control information and a second access control information, the first access control information and the second access control information complimentarily constituting the access control information;
(B) a step of specifying given data as administrative information-enclosing data and embedding the first access control information into the administrative information-enclosing data;
(C) a step of setting an administrative identifier for making the administrative information-enclosing data in which the first access control information is embedded be an information item in the document data; and
(D) a step of enclosing, in the administrative identifier, information content of the administrative information-enclosing data in which the first access control information is embedded, and the second access control information for extracting the first access control information from the administrative information-enclosing data to create the access control information for accessing the document data together with the first access control information.
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Accused Products
Abstract
A document distributing method is proposed using access control information separated into invisible data embedded as an electronic watermark and visible data described in a structured document to achieve prevention of unauthorized alteration of document data, authentication thereof, and prevention of unauthorized access thereto. The method has a step of separating access control information into a first access control information and a second access control information, a step of embedding the first access control information into administrative information-enclosing data, a step of setting an administrative identifier for making the administrative information-enclosing data in which the first access control information has been embedded be an information item in the document data, and a step of enclosing, in the administrative identifier, information content of the administrative information-enclosing data and the second access control information for creating the access control information for accessing the document data together with the first access control information.
105 Citations
21 Claims
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1. A method of distributing a structured document in which identifiers are respectively set for a plurality of information items in document data made of digitized data including text data, image data, music data, and/or other digitized data, and information content of each information item is enclosed in each respective identifier, the method comprising:
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(A) a step of creating access control information necessary to access the document data and separating the access control information into a first access control information and a second access control information, the first access control information and the second access control information complimentarily constituting the access control information;
(B) a step of specifying given data as administrative information-enclosing data and embedding the first access control information into the administrative information-enclosing data;
(C) a step of setting an administrative identifier for making the administrative information-enclosing data in which the first access control information is embedded be an information item in the document data; and
(D) a step of enclosing, in the administrative identifier, information content of the administrative information-enclosing data in which the first access control information is embedded, and the second access control information for extracting the first access control information from the administrative information-enclosing data to create the access control information for accessing the document data together with the first access control information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for creating data of a structured document in which identifiers are respectively set for a plurality of information items in document data made of digitized data including text data, image data, music data, and/or other digitized data, and information content of each information item is enclosed in each respective identifier, the apparatus comprising:
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an access control information-creating means for creating access control information necessary to access the document data;
a first administrative information-enclosing means for specifying given data as administrative information-enclosing data and enclosing a first access control information that constitutes a portion of the access control information in the administrative information-enclosing data;
a document structure-creating means for setting identifiers respectively for information items of the digitized data contained in the document data and enclosing information content of each information item in each respective identifier; and
a second administrative information-enclosing means for setting an administrative identifier for making the administrative information-enclosing data be an information item in the document data, and enclosing as an information content of the administrative identifier a second access control information that complimentarily constitutes the access control information together with the first access control information.
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13. An apparatus for accessing data of a structured document in which identifiers are respectively set for a plurality of information items in document data made of digitized data including text data, image data, music data, and/or other digitized data, and information content of each information item is enclosed in each respective identifier, the apparatus comprising:
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a document parsing means for parsing distributed document data;
a second access control information-extracting means for extracting a second access control information from an administrative identifier contained in the document data; and
a document data-accessing means for allowing access to the document data based on the second access control information and a first control information enclosed in administrative information-enclosing data contained in the document data.
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14. A computer executable program for executing a method of distributing a structured document in which identifiers are respectively set for a plurality of information items in document data made of digitized data including text data, image data, music data, and/or other digitized data, and information content of each information item is enclosed in each respective identifier, comprising:
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(A) a step of creating access control information necessary to access the document data and separating the access control information into a first access control information and a second access control information, the first access control information and the second access control information complimentarily constituting the access control information;
(B) a step of specifying given data as administrative information-enclosing data and embedding the first access control information into the administrative information-enclosing data;
(C) a step of setting an administrative identifier for making the administrative information-enclosing data in which the first access control information is embedded be an information item in the document data; and
(D) a step of enclosing, in the administrative identifier, information content of the administrative information-enclosing data in which the first access control information is embedded, and the second access control information for extracting the first access control information from the administrative information-enclosing data to create the access control information for accessing the document data together with the first access control information.
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15. A method of managing a document comprising:
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(A) a step of acquiring as digitized data information in which access control information is embedded as visually or auditorily unrecognizable watermark data;
(B) a step of extracting the access control information from the digitized data;
(C) a step of acquiring document information of the document data made of at least one of specific text data, image data, music data, and other digitized data that correspond to the access control information; and
(D) a step of creating a structured document in which identifiers are respectively set for a plurality of information items in the document information and information content of each information item is enclosed in each respective identifier. - View Dependent Claims (16, 17)
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18. A document management apparatus comprising:
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a data acquiring means for acquiring as digitized data information in which access control information is embedded as visually or auditorily unrecognizable watermark data;
an access control information-extracting means for extracting the access control information from the digitized data acquired by the data acquiring means;
a document information acquiring means for acquiring document information of the document data made of at least one of specific text data, image data, music data, and other digitized data that correspond to the access control information extracted from said access control information-extracting means; and
a structure text-creating means for creating a structured document in which identifiers are respectively set for a plurality of information items in the document information acquired by said document information acquiring means and information content of information item is enclosed in each respective identifier. - View Dependent Claims (19, 20)
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21. A computer executable program for executing a document management method comprising:
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(A) a step of acquiring as digitized data information in which access control information is embedded as visually or auditorily unrecognizable watermark data;
(B) a step of extracting the access control information from the digitized data;
(C) a step of acquiring document information of the document data made of at least one of specific text data, image data, music data, and other digitized data that correspond to the access control information; and
(D) a step of creating a structured document in which identifiers are respectively set for a plurality of information items in the document information and information content of each information item is enclosed in each respective identifier.
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Specification