PATENT ABSTRACT
Provided are a method and an apparatus for managing online and offline documents using RFID technology. The method includes: pre-registering online and offline documents using radio frequency identification tag information stored in at least one of the online and offline documents to be output; determining whether the pre-registered online and offline documents are authorized to be output; and if it is determined that the pre-registered online and offline documents are authorized to be output, generating documents of the online and offline documents to be output and storing new radio frequency identification tag information in radio frequency identification tags attached to the documents to be output.

PATENT DESCRIPTION
[0001]     This application claims the priority of Korean Patent Application No. 10-2004-0087042, filed on Oct. 29, 2004, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.  
       BACKGROUND OF THE INVENTION  
       [0002]     1. Field of the Invention  
         [0003]     The present invention relates to a method and an apparatus for managing online and offline documents using radio frequency identification (RFID) technology, and more particularly, to a system for providing online and offline document security service using RFID technology.  
         [0004]     2. Description of the Related Art  
         [0005]     In recent days, enterprises, government and public offices, schools, monetary organizations, up-to-date technology research institutes, and the like manage internal document data and share information using a Knowledge Management System (KMS) or Electronic Document Management System (EDMS) so as to improve efficiency of affairs.  
         [0006]     However, in a conventional document security method, online documents are given security only against online accesses. Thus, matters printed online and copied and transmitted matters of the online printed matters cannot be managed. Also, methods and apparatuses for managing drain and scrap of documents output offline have not been suggested.  
       SUMMARY OF THE INVENTION  
       [0007]     The present invention provides a method and an apparatus for managing online and offline documents by which an online document can include RFID tag information in a management stage, RFID tags can include the RFID tag information using a document output apparatus in an output stage, the RFID tag information can be managed to be related to the original online document using an online document management server, new RFID tag information can be received from the online document management server to copy and transmit the online document including the RFID tags so as to store the new RFID tag information in the RFID tags, and the RFID tags can be attached to or included in the online document so as to be managed.  
         [0008]     The present invention also provides a method and an apparatus for managing online and offline documents by which drain of output documents outside offices, companies, or the like can be managed using an RFID reader and positions of documents to be scraped can be checked using the RFID reader so as to easily scrap the documents.  
         [0009]     According to an aspect of the present invention, there is provided an apparatus for managing online and offline documents using radio frequency identification technology, including: a document management server receiving radio frequency identification tag information stored in the online and offline documents from a document management client and a document output apparatus to manage the online and offline documents; a receiver receiving extracted radio frequency identification tag information from one of the document management client and the document output apparatus; a radio frequency identification tag information analyzer receiving and analyzing the radio frequency identification tag information and extracting history information of a document comprising the radio frequency identification tag information to generate a radio frequency identification tag information analysis signal; a document management information register receiving the radio frequency identification tag information analysis signal to store the history information of the document and generating new radio frequency identification tag information to be stored in a document to be output using the history information; a transmitter transmitting the new radio frequency identification tag information to one of the document management client and the document output apparatus extracting the radio frequency identification tag information; and a controller controlling an output and a circulation of the document using the radio frequency identification tag information analysis signal.  
         [0010]     According to another aspect of the present invention, there is provided a document output apparatus receiving data of an online document to be output and radio frequency identification tag information stored in the online document data from a document management client to output the online document as an offline document, including: a receiver receiving the data of the online document and the radio frequency identification tag information from the document management client and receiving new radio frequency identification tag information to be stored in radio frequency identification tags of a document to be output, the document being generated by a document management server, based on the radio frequency identification tag information; a transmitter transmitting the radio frequency identification tag information to the document management server; a printer output unit outputting an offline document based on the data of the online document and storing the new radio frequency identification tag information in radio frequency identification tags attached to the offline document; and a controller transmitting the data of the online document and the new radio frequency identification tag information received from the receiver to the printer output unit.  
         [0011]     According to still another aspect of the present invention, there is provided a document output apparatus extracting an offline document to be output and radio frequency identification tag information stored in the offline document to output a new offline document, including: a copy input unit extracting data of the offline document; a radio frequency identification tag information extractor extracting the radio frequency identification tag information stored in radio frequency identification tags of the offline document; a transmitter transmitting the radio frequency identification tag information extracted by the radio frequency identification tag information extractor to a document management server; a receiver receiving the radio frequency identification tag information to be stored in radio frequency identification tags of a new offline document to be output from the document management server; a copy output unit outputting the new offline document based on the data of the offline document to be output and storing the new radio frequency identification tag information in radio frequency identification tags attached to the new offline document; and a controller transmitting the data of the offline document received from the copy input unit and the radio frequency identification tag information received from the receiver to the copy output unit.  
         [0012]     According to yet another aspect of the present invention, there is provided a receiver document output apparatus receiving output data of a document to be output and radio frequency identification tag information from a document management server using the document transmitted from a transmitter document output apparatus to the document management server, the radio frequency identification tag information, and receiver document output apparatus information, including: a receiver receiving the data of the document and the radio frequency identification tag information stored in the document from a document management client and receiving new radio frequency identification tag information to be stored in radio frequency identification tags of a document to be output, the document being generated by the document management server, based on the radio frequency identification information; a transmitter transmitting the radio frequency identification tag information to the document management server; a facsimile output unit outputting the offline document based on the data of the document and storing the new radio frequency identification tag information in radio frequency identification tags attached to the offline document; and a controller transmitting the data of the online document and the new radio frequency identification tag information received from the receiver to the facsimile output unit.  
         [0013]     According to yet another aspect of the present invention, there is provided a method of managing online and offline documents using a document management server receiving radio frequency identification tag information stored in the online and offline documents received from a document management client and a document output apparatus to manage the online and offline documents, including: pre-registering online and offline documents using radio frequency identification tag information stored in at least one of the online and offline documents to be output; determining whether the pre-registered online and offline documents are authorized to be output; and if it is determined that the pre-registered online and offline documents are authorized to be output, generating documents of the online and offline documents to be output and storing new radio frequency identification tag information in radio frequency identification tags attached to the documents to be output. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0014]     The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:  
         [0015]      FIG. 1  is a block diagram of an apparatus for managing online and offline documents using RFID technology according to an embodiment of the present invention;  
         [0016]      FIG. 2A  is a view illustrating a document output apparatus as shown in  FIG. 1  according to an embodiment of the present invention;  
         [0017]      FIG. 2B  is a view illustrating a document output apparatus as shown in  FIG. 1  according to another embodiment of the present invention;  
         [0018]      FIG. 2C  is a view illustrating a document output apparatus as shown in  FIG. 1  according to still another embodiment of the present invention  
         [0019]      FIG. 3  is a view illustrating a document management server shown in  FIG. 1  according to an embodiment of the present invention;  
         [0020]      FIG. 4  is a flowchart of a method of managing online and offline documents using RFID technology according to an embodiment of the present invention;  
         [0021]      FIG. 5  is a flowchart of operation S 400  of the method of  FIG. 4 ;  
         [0022]      FIG. 6  is a flowchart of operation S 420  of the method of  FIG. 4 ;  
         [0023]      FIG. 7  is a flowchart of operation S 440  of the method of  FIG. 4 ;  
         [0024]      FIG. 8  is a flowchart of operation S 460  of the method of  FIG. 4  according to an embodiment of the present invention; and  
         [0025]      FIG. 9  is flowchart of operation S 460  of the method of  FIG. 4  according to another embodiment of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0026]      FIG. 1  is a block diagram of an apparatus for managing online and offline documents using RFID technology according to an embodiment of the present invention.  
         [0027]     Referring to  FIG. 1 , the apparatus includes a document management server  100 , document management clients  110  and  150 , document output apparatuses  120  and  160 , and RFID readers  130  and  170 . Here, two document management clients  110  and  150 , two document output apparatuses  120  and  160 , and two RFID readers  130  and  170  are shown in  FIG. 1 . However, the structure of the apparatus shown in  FIG. 1  may be modified into various other forms.  
         [0028]     The document output apparatuses  120  and  160  are controlled by the document management clients  110  and  150  and the document management servers  100  interconnected via a network to store RFID tag information in RFID tags attached to or included in documents to be output so as to output the documents including the RFID tag information. In detail, the document output apparatuses  120  and  160  may be printers, copiers, facsimiles, or the like. A printer, a copier, and facsimiles will be described in detail with reference to  FIGS. 2A through 2C .  
         [0029]     The document management clients  110  and  150  provide RFID tag information of online documents and data of documents to be output to the document output apparatuses  120  and  160 , respectively. The document management clients  110  and  150  are controlled by the document management server  100  so as to provide RFID tag information of online documents they have to the document management server  100 .  
         [0030]     The RFID readers  130  and  170  detect RFID tag information from RFID tags attached to output offline documents and provide RFID detection signals to the document management clients  110  and  150 . The document management clients  110  and  150  receive the RFID detection signals from the RFID readers  130  and  170  and transmit the RFID detection signals to the document management server  100 . In the present embodiment, the RFID readers  130  and  170  transmit the RFID detection signals to the document management clients  110  and  150 . However, according to an aspect of the present invention, the RFID readers  130  and  170  may directly transmit the RFID detection signals to the document management server  100 .  
         [0031]     The document management-server  100  determines whether to authorize an output of a corresponding document, manages values stored in the RFID tags and document information related to the RFID tags, and performs a log function of managing generation, output, copy, transmission, drain, and scrap of documents including RFID tags.  
         [0032]     The document management server  100  possesses information for accessing a document of each online management server according to a security level to determine whether to authorize an output of the document. The document management server  100  also includes information as to document level access authorities of receiver document output apparatuses for document output apparatuses for transmitting documents (for example, transmitting documents via facsimiles or the like). The more detailed structure of the document management server  100  will be described later with reference to  FIG. 3 .  
         [0033]      FIG. 2A  is a view illustrating an example of the document output apparatuses  120  and  160  shown in  FIG. 1 . Referring to  FIG. 2A , an offline output apparatus for an online document outputs an online document as an offline document like a printer  200 . The printer  200  transmits a document online to output the document offline and includes a transmitter  201 , a receiver  202 , a printer output unit  204 , and a controller  205 .  
         [0034]     The document management clients  110  and  150  transmit data of an online document to be output and RFID tag information to the receiver  202  of the printer  200 .  
         [0035]     The receiver  202  transmits the data of the online document to be output and the RFID tag information to the controller  205 .  
         [0036]     The controller  205  transmits the data of the online document to be output to the printer output unit  204  and the RFID tag information through the transmitter  201  to the document management server  100 .  
         [0037]     The document management server  100  generates new RFID tag information in consideration of the property of the RFID tag information received from the transmitter  201  and transmits the new RFID tag information to the receiver  202 .  
         [0038]     The receiver  202  receives the new RFID tag information from the document management server  100  and transmits the new RFID tag information to the controller  205 .  
         [0039]     The controller  205  transmits the new RFID tag information to the printer output unit  204 .  
         [0040]     The printer output unit  204  receives the data of the document from the controller  205  and includes the data of the document in an offline document to be output and stores the new RFID tag information in RFID tags formed in the offline document. Here, RFID tags are attached to or included in a document and output via the printer  200 .  
         [0041]      FIG. 2B  is a view illustrating another example of the document output apparatuses  120  and  160  shown in  FIG. 1 . Referring to  FIG. 2B , an offline output apparatus for an offline document outputs an offline document as a new offline document like a copier  220 . The copier  220  includes a transmitter  221 , a receiver  222 , a RFID tag information extractor  223 , a copy output unit  224 , a controller  225 , and a copy input unit  226 .  
         [0042]     The RFID tag information extractor  223  extracts RFID tag information from RFID tags attached to or included in an offline document and transmits the RFID tag information to the controller  225 .  
         [0043]     The copy input unit  226  copies an offline document to be currently output and transmits data of the offline document to the controller  225 .  
         [0044]     The transmitter  221  receives the extracted RFID tag information from the controller  225  and transmits the extracted RFID tag information to the document management server  100 .  
         [0045]     The document management server  100  generates new RFID tag information in consideration of the property of the RFID tag information received from the transmitter  221  and transmits the new RFID tag information to the receiver  222 .  
         [0046]     The receiver  222  receives the new RFID tag information from the document management server  100  and transmits the new RFID tag information to the controller  225 .  
         [0047]     The controller  225  transmits the new RFID tag information to the copy output unit  224 .  
         [0048]     The copy output unit  224  receives data of the document to be currently output from the controller  225 , outputs the data of the document by attaching the data of the document to an offline document, and stores the new RFID tag information in RFID tags formed in the offline document. Here, RFID tags are attached to or included in a document and output through the copier  220  to the outside.  
         [0049]      FIG. 2C  is a view illustrating another example of the document output apparatuses  120  and  160  shown in  FIG. 1 . Referring to  FIG. 2C , like a facsimile, when a transmitter output apparatus receives an online or offline document and transmits the online or offline document to a new transmitter output apparatus, the new transmitter output apparatus outputs the online or offline document as an offline document.  
         [0050]     A transmitter facsimile  240  includes a transmitter  241 , a receiver  242 , an RFID tag information extractor  243 , a facsimile output unit  244 , a controller  245 , and a facsimile information extractor  246 .  
         [0051]     A receiver facsimile  240 ′ includes a transmitter  241 ′, a receiver  242 ′, a RFID tag information extractor  243 ′, a facsimile output unit  244 ′, a controller  245 ′, and a facsimile information extractor  246 ′.  
         [0052]     A transmitter output unit for an online document will now be described.  
         [0053]     The document management client  110  transmits data of an online document to be output, RFID tag information, and receiver facsimile information to the receiver  242  of the transmitter facsimile  240 .  
         [0054]     The receiver  242  transmits the data of the online document, the RFID tag information, and the receiver facsimile information to the controller  245 .  
         [0055]     The controller  245  controls the transmitter  241  to transmit the data of the online document, the RFID tag information, and the receiver facsimile information to the document management server  100 .  
         [0056]     The document management server  100  checks the receiver facsimile  240 ′ using the receiver facsimile information received from the transmitter  241  and then transmits the data of the online document and the RFID tag information to the receiver facsimile  240 ′.  
         [0057]     The receiver  242 ′ of the receiver facsimile  240 ′ receives the data of the online document and the RFID tag information from the document management server  100 .  
         [0058]     The receiver  242 ′ transmits the data of the online document and the RFID tag information to the controller  245 ′.  
         [0059]     The controller  245 ′ transmits the data of the online document to the facsimile output unit  244 ′ and controls the transmitter  241 ′ to transmit the RFID tag information to the document management server  100 .  
         [0060]     The document management server  100  generates new RFID tag information in consideration of the property of the RFID tag information received from the transmitter  241 ′ and transmits the new RFID tag information to the receiver  242 ′.  
         [0061]     The receiver  242 ′ receives the new RFID tag information from the document management server  100  and transmits the new RFID tag information to the controller  245 ′.  
         [0062]     The controller  245 ′ transmits the new RFID tag information to the facsimile output unit  244 ′.  
         [0063]     The facsimile output unit  244 ′ receives the data of the document to be output from the controller  245 ′, outputs the data of the online document by attaching the data of the document to an offline document and stores the new RFID tag information in RFID tags formed in the offline document. Here, RFID tags are attached to or included in a document and output through the receiver facsimile  240 ′ to the outside.  
         [0064]     A transmitter output apparatus for an offline document will now be described.  
         [0065]     The RFID tag information extractor  223  extracts RFID tag information from an offline document and transmits the RFID tag information to the controller  225 .  
         [0066]     The facsimile information extractor  246  extracts data of a document to be output and information as to a receiver facsimile to which the document is to be transmitted and transmits the data of the document and the information as to the receiver facsimile to the controller  245 .  
         [0067]     The transmitter  241  receives the RFID tag information, the data of the document, and the receiver facsimile information from the controller  245  and transmits the RFID tag information, the data of the document, and the receiver facsimile information to the document management server  100 .  
         [0068]     The document management server  100  receives the data of the document, the RFID tag information, and the receiver facsimile information from the transmitter  241  and transmits the data of the document, the RFID tag information to the transmitter facsimile  240 ′.  
         [0069]     The receiver  242 ′ of the receiver facsimile  240 ′ receives the data of the document and the RFID tag information from the document management server  100 .  
         [0070]     The receiver  242 ′ transmits the data of the document and the RFID tag information to the controller  245 ′.  
         [0071]     The controller  245 ′ transmits the data of the document to the facsimile output unit  244 ′ and controls the transmitter  241 ′ to transmit the RFID tag information to the document management server  100 .  
         [0072]     The document management server  100  generates new RFID tag information in consideration of the property of the RFID tag information received from the transmitter  241 ′ and transmits the new RFID tag information to the receiver  242 ′.  
         [0073]     The receiver  242 ′ receives the new RFID tag information from the document management server  100  and transmits the new RFID tag information to the controller  245 ′.  
         [0074]     The controller  245 ′ transmits the new RFID tag information to the facsimile output unit  244 ′.  
         [0075]     The facsimile output unit  244 ′ receives the data of the document to be output from the controller  245 ′, outputs the data of the document by attaching the data of the document to an offline document, and stores the new RFID tag information in RFID tags formed in the offline document. Here, RFID tags are attached to or included in a document and output through the receiver facsimile  240 ′ to the outside.  
         [0076]     Referring to  FIGS. 2A through 2C , a document output apparatus can be classified into three types: an offline output apparatus for an online document, an offline output apparatus for an offline document (a paper document to which RFID tags are attached or in which RFID tags are included, the RFID tags including information as to the paper document), and a transmitter output apparatus for online and offline documents. The printer  200 , the copier  220 , and the facsimile  240  have been described with reference to  FIGS. 2A through 2C . However, a document output apparatus may be various forms.  
         [0077]      FIG. 3  is a view illustrating the document management server  100  shown in  FIG. 1  according to an embodiment of the present invention. Referring to  FIG. 3 , the document management server  100  includes a transmitter  300 , a receiver  310 , a document management information register  320 , a RFID tag information analyzer  330 , a facsimile information analyzer  340 , an output authorization determiner  350 , a display unit  360 , and a controller  370 .  
         [0078]     A case where the document output apparatuses  120  and  160  are printers and copiers will now be described.  
         [0079]     The receiver  310  receives RFID tag information from the document output apparatuses  120  and  160 . The receiver  310  also receives RFID tag information of an online document from the document management clients  110  and  150 .  
         [0080]     The receiver  310  transmits the RFID tag information to the controller  370 . The controller  370  transmits the RFID tag information received from the receiver  310  to the RFID tag information analyzer  330 .  
         [0081]     The RFID tag information analyzer  330  analyzes the RFID tag information to detect various types of history information as to the online document. Thus, generation, print, copy, transmission, drain, and scrap histories of the online document can be managed. The RFID tag information analyzer  330  transmits an RFID tag information analysis signal generated by analyzing the RFID tag information to the controller  370 .  
         [0082]     The controller  370  transmits the RFID tag information analysis signal to the document management information register  320 . The document management information register  320  stores new document management information as to a corresponding document and transmits new RFID tag information to the controller  370 .  
         [0083]     The controller  370  controls the transmitter  300  to transmit the new RFID tag information to the document output apparatuses  120  and  160  or the document management clients  110  and  150 .  
         [0084]     A case where the document output apparatuses  120  and  160  are facsimiles will now be described.  
         [0085]     The receiver  310  receives RFID tag information, data of a document to be output, and receiver facsimile information from the document output apparatuses  120  and  160 .  
         [0086]     The controller  370  receives the receiver facsimile information from the receiver  310  and transmits the receiver facsimile information to the facsimile information analyzer  340 .  
         [0087]     The facsimile information analyzer  340  receives the receiver facsimile information from the controller  370 , analyzes the receiver facsimile information to determine whether a receiver facsimile can receive the receiver facsimile information, and if it is determined that the receiver facsimile can receive the receiver facsimile information, transmits information as to a position of the receiver facsimile to the controller  370 .  
         [0088]     The controller  370  receives the information as to the position of the receiver facsimile from the facsimile information analyzer  340  and transmits the data of the document and the RFID tag information received from the receiver  310  through the transmitter  300  to the receiver facsimile.  
         [0089]     It has been described that the controller  370  transmits the data of the document and the RFID tag information received from the receiver  310  through the transmitter  300 . However, the controller  370  may directly transmit the RFID tag information received from the receiver  310  to the RFID tag information analyzer  330 , store the RFID tag information in the document management information register  320  using the RFID tag analysis signal analyzed by the RFID tag information analyzer  330 , and transmit the new RFID tag information generated using the RFID tag analysis signal through the transmitter  300  to the receiver facsimile.  
         [0090]      FIG. 4  is a flowchart of a method of managing online and offline documents using RFID technology according to an embodiment of the present invention. Referring to  FIG. 4 , in operation S 400 , RFID tag information stored in RFID tags of an online document generated by the document management clients  110  and  150  and an offline document output by the document output apparatuses  120  and  160  are registered.  
         [0091]     In operation S 420 , a determination is made as to whether the online and offline documents are authorized to be printed, copied, and transmitted. In operation S 440 , printed, copied, and transmitted matters of the online and offline documents are generated and RFID tag information is stored in RFID tags of the printed, copied, and transmitted matters (documents to be output).  
         [0092]     In operation S 460 , drain and scrap of the output offline document are managed by the RFID readers  130  and  170 .  
         [0093]     Operations S 400 , S 420 , and  460  of the method of  FIG. 4  will be describe in more detail below.  
         [0094]      FIG. 5  is a flowchart of operation S 400  of the method of  FIG. 4 . Referring to  FIG. 5 , in operation S 500 , the document management server  100  sets security levels of online and offline documents using RFID tag information.  
         [0095]     In operation S 520 , the document management server  100  sets ranges in which the online and offline documents are printed, copied, and transmitted, for example, a number of times online and offline documents are output and time limits for outputting the online and offline documents.  
         [0096]     In operation S 540 , the document management server  100  determines ranges in which the online and offline documents are to be drained. Here, the document management server  100  stores new RFID tag information of documents generated when the online document is printed and the offline document is copied and transmitted.  
         [0097]      FIG. 6  is a flowchart of operation S 420  of the method of  FIG. 4 . Referring to  FIG. 6 , in operation S 600 , the document management server  100  authenticates a user desiring to output online and offline documents. In other words, for the user authentication, the document management server  100  checks user authentication information to determine whether the user using a current document output apparatus has an authority to access the document management server  100 . In detail, the user authentication may be performed using various encryption methods.  
         [0098]     In operation S 620 , the document management server  100  authenticates access ranges of the online and offline documents according to security levels using information as to the online and offline documents pre-registered in operation S 400 . In other words, the document management server  100  checks access information according to the security levels to determine whether the user having the authority to access the document management server  100  have an authority to access a corresponding document level.  
         [0099]     In operation S 640 , the output authorization determiner  350  of the document management server  100  determines whether the online and offline documents are authorized to be output using user authentication information and the access information according to the security levels.  
         [0100]      FIG. 7  is a flowchart of operation S 440  of the method of  FIG. 4 . Referring to  FIG. 7 , in operation S 700 , receivers of the document output apparatuses  120  and  160  receive new RFID tag information from the document management server  100 .  
         [0101]     In operation S 720 , the document output apparatuses  120  and  160  store the new RFID tag information in RFID tags attached to a document to be output.  
         [0102]     In operation S 740 , the document output apparatuses  120  and  160  output the document to which the RFID tags are attached.  
         [0103]      FIG. 8  is a flowchart of operation S 460  of the method of  FIG. 4  according to an embodiment of the present invention. Referring to  FIG. 8 , in operation S 800 , the receiver  310  of the document management server  100  receives RFID tag information obtained by reading RFID tags of an offline document using the RFID readers  130  and  170 . Here, the receiver  310  may directly receive the RFID tag information from the RFID readers  130  and  170 . In a case where the RFID readers  130  and  170  interface with the document management clients  110  and  150 , respectively, the receiver  310  may receive the RFID tag information from the document management clients  110  and  150 .  
         [0104]     In operation S 820 , the RFID tag information analyzer  330  of the document management server  100  analyzes the RFID tag information to generate the RFID tag information analysis signal.  
         [0105]     In operation S 840 , the document management server  100  manages history information of an output document using the RFID tag information analysis signal. In detail, the document management server  100  stores and manages the RFID tag information in the document management information register  320 .  
         [0106]      FIG. 9  is a flowchart of operation S 460  of the method of  FIG. 4  according to another embodiment of the present invention. Referring to  FIG. 9 , in operation S 900 , the receiver  310  of the document management server  100  receives RFID tag information obtained by reading RFID tags of an offline document using the RFID readers  130  and  170 . Here, the receiver  310  may directly receive the RFID tag information from the RFID readers  130  and  170 . In a case where the RFID readers  130  and  170  interface with the document management clients  110  and  150 , respectively, the receiver  310  may receive the RFID tag information from the document management clients  110  and  150 .  
         [0107]     In operation S 920 , the RFID tag information analyzer  330  of the document management server  100  analyzes the RFID tag information to generate the RFID tag information analysis signal.  
         [0108]     In operation S 940 , the document management server  100  determines whether documents read by the RFID readers  130  and  170  include a document to be scraped. Here, the determination as to whether the documents includes the document to be scraped is made by comparing the RFID tag information analysis signal with the document management information stored in the document management information register  320 . If the document management server  100  determines in operation S 940  that the documents do not include the document to be scraped, the document management server  100  returns to operation S 900 . If the document management server  100  determines in operation S 940  that the documents include the document to be scraped, the document management server  100  proceeds to operation S 960 .  
         [0109]     In operation S 960 , the document management server  100  checks a position of the document to be scraped through the RFID tag information analyzer  330  and controls the document management clients  110  and  150  through the transmitter  300  to scrap the document. The document management server  100  may directly output a document scrap signal to a corresponding document output apparatus. In this case, the document management server  100  may display the document scrap signal on the display unit  360 .  
         [0110]     As described above, in a method and an apparatus for managing online and offline documents using RFID technology, a document security system can be provided so as to improve security, stability, and the convenience of a user.  
         [0111]     Also, log information can be recorded and observed from the generation of each document to the scrap of the each document to check whether a document on which security level is output, copied, and transmitted to an authenticated user. In addition, drain of a security document outside an office or a company can be observed. When the security document is output, copied, and transmitted, RFID tags can be included in or attached to documents output from RFID output apparatuses. Thus, these documents can be managed. As a result, the overall document security service can be provided to online and offline documents.  
         [0112]     Accordingly, the method and the apparatus of the present invention can be applied to army-related organizations or the government departments necessarily requiring security against offline documents and departments of companies in charge of new technology development. Thus, the companies can completely prevent documents from being drained by insiders. Also, a manager operating a system can minimize the management of networks and stably manage original document files to preserve intellectual property rights and to efficiently operate system.  
         [0113]     The invention can also be embodied as computer readable codes on a computer readable recording medium. The computer readable recording medium is any data storage device that can store data which can be thereafter read by a computer system. Examples of the computer readable recording medium include read-only memory (ROM), random-access memory (RAM), CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and carrier waves (such as data transmission through the Internet). The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.  
         [0114]     While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.