JP2001282624A - Method and system for saving original of electronic document - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem where an electronic document, which is authorized as the original needs to be specified and denial by an applicant and alterations in a reception side need to be prevented since both the applicant side and reception side, can make a copy of the electronic document, when an application is made by using the electronic document. SOLUTION: A reception-side computer 4 adds a log 7, etc., including reception time to a received written application 6, and the written application 6, corresponding log 7, etc., are subjected to digital signature together and are stored as the written application original 10 in a storage device. The written application original 10 is ciphered and saved as the ciphered original 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a method and a system for validating and storing an original of an electronic document.

[0002]

2. Description of the Related Art With the development of the Internet network and the spread of personal computers, digitized documents are transmitted via networks and business processes are performed on received digitized documents. However, as a characteristic of digitized documents,
The original is left on the side that created and sent the digitized document, and the duplicate document is sent. Also, the side that has received and accepted the digitized document can freely copy the digitized document. Therefore, it is necessary to specify which of these digitized documents and their duplicates is the original.

[0003] When a paper document is exchanged between a creator and a recipient, or when an application is submitted using a paper document, the original is clarified by a stamp or signature, and the applicant and the receiver agree. Without mutual possession of the originals. However, when applying for an electronic document, the original data is uncertain as described above. Also, the applicant can modify the digitized application form on the applicant side or the receiving side after the application. In addition, there is no possibility that the two may become inconsistent due to force majeure between the time when the applicant sends out the digitized document and the time when the receiver receives the digitized document. Further, the applicant can also deny the application form received by the receiving side.

[0004]

As described above, in order to smoothly apply for a document using an electronic document, it is necessary to specify a document that is recognized as an original. Also, the receiving side of the digitized document needs to prevent denial by the applicant. Further, it is necessary to prevent the electronic document from being altered by the receiving side of the electronic document.

An object of the present invention is to provide a method and a system for storing an original of an electronic document which solves the above problems.

[0006]

According to the present invention, a computer which receives a digitized document input from the outside adds a log or the like including the time at which the digitized document was received to a computer.
The invention is characterized by a method and a system for storing an original of an electronic document, in which the digitalized document and the log corresponding thereto are collectively digitally signed and stored in a storage device.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of a system for storing an original of an electronic document according to the present embodiment. The system includes an applicant computer 2, a reception computer 4, and a wide area network 3 such as the Internet for connecting the two. The storage device of the applicant computer 2 stores an application 1 which is one of the electronic documents. The receiving computer 4 has a storage device for storing the application form 6, the log 7, the description 8, the original 10 such as the application, and the encrypted original 12. The applicant computer 2 prepares the application form 1, and receives it via the network 3.
Send to Alternatively, the applicant may submit an application form in paper form to a reception desk of a receiving local government or the like. The reception-side computer 4 is a computer system including a computer at a window generally serving as a client terminal and a server computer for managing files. The memory of the receiving computer 4 stores the programs of the application receiving unit 5, the original document creating unit 9 and the sub original document storing unit 11, and is executed by the receiving computer 4.

The application receiving unit 5 receives data input from the application 1 or a paper application transmitted from the applicant's computer 2 via the network 3, and stores the data as an application 6 in a storage device. Also, a log 7 collected along with the reception of the application form and a description 8 showing the situation at the time of receiving the application form.
Is stored in the storage device. The original creation unit 9 collectively applies the digital signature to the application form 6, the log 7, and the explanatory note 8, and stores the digital signature as an original 10 such as an application form in a storage device. The sub-original storage unit 11 encrypts the original 10 such as an application form, and
Is stored in the storage device.

FIG. 2 is a flowchart showing the flow of the processing of the application form receiving unit 5. The application form receiving unit 5 receives the application form 1 received in the form of e-mail via the network 3 or is input via a keyboard of a client terminal, an OCR (optical character recognition mechanism), a floppy (registered trademark) disk, or the like. The received application form is received and assigned a reference number (step 21), and stored in the storage device as application form 6 (step 22). Further, the application form receiving unit 5 creates the log 7 for the application form and stores it in the storage device (step 23). This log 7 includes the reference number, the date and time when the application was received or entered, the name of the application document, the name of the applicant, the reception form (e-mail, keyboard input, storage medium input, etc.) The proof of. Also, the explanation 8 to which the same reference number is added is stored in the storage device (step 24). The description 8 includes the invoice of the e-mail that sent the application, the situation when the paper application or storage medium input by the counter staff was received from the applicant, and the like. It does not matter if there is no description 8.

FIG. 3 shows the original data creation unit 9 and the sub original data storage unit 1.
3 is a flowchart illustrating a flow of a first process. The original creation unit 9 inputs the application form 6, the log 7, and the description 8 which are stored in the storage device and have the same reference number (step 3).
1) A digital signature is created for the whole of the combined electronic document and is additionally recorded in the electronic document (step 32). Here, the log 7 and the digital signature will replace the conventional reception stamp. Generally, a digital signature is
This is information obtained by taking a hash value for the content of the digitized document and encrypting this hash value with an encryption key. When checking whether or not the digitized document has been tampered with, it is possible to verify the presence or absence of tampering by taking a hash value of the contents of the original and comparing the encrypted hash value with the decrypted hash value.

Next, the original document creation unit 9 registers the original document 10 such as an application to which a digital signature has been added in a storage device (step 33). The original 10 such as an application form is referred to at the time of business processing in the local government. It is possible to check the falsification of the original 10 such as the application form by referring to the digital signature in the business process. Next, the original document creator 9 deletes the application form 6, the log 7, and the description 8 relating to the reference number from the storage device (step 34).

Next, the sub-original storage unit 11 inputs the original 10 such as the application form from the storage device (step 35), and performs an encryption process on the original 10 such as the application form to create an encrypted original (step 35). 36) Then, the created sub original is stored and stored in the storage device as the encrypted original 12 (step 37). When the falsification is detected as a result of checking the digital signature of the original 10 such as an application, or when it is suspected that the application 6 has been falsified by an action from the applicant, the encrypted original 12 is used. Is opened and decrypted, and the presence or absence of tampering is verified.

As described above, in the present embodiment, the log 7 is added to the application 6 received by the receiving computer 4, and the original application 10 such as a digitally signed application is obtained. It is possible to determine that 10 is the original, and it is possible to prevent rejection from the applicant. Further, it is possible to verify that the original document 10 such as an application has been digitally signed, and whether the original document 10 such as an application has been falsified inside the receiving side by storing the encrypted original 12.

There are two types of application forms 1 transmitted from the applicant, one without the digital signature of the applicant and one with the digital signature. In the latter case, the reception-side computer 4 may apply the digital signature of the reception side together with the application 6, the log 7, and the description 8 including the digital signature of the applicant.

[0016]

As described above, according to the present invention, the original of the application form that can be trusted by the receiving side can be determined by the receiving side performing a receiving stamp and a digital signature corresponding to the receiving stamp. Regarding denial from the transmission side, it is possible to prevent denial by the presence of the digital signature performed on the transmission side. Also for electronic application forms without digital signature,
The receiving side decompresses the original of the received document determined by the present invention with the digital signature of the receiving party, so that it is possible to determine not only the receiving side alone device such as the applicant's electronic application form, network relay log information, receiving time Since the information from the independent devices is comprehensively verified, the information can be used as a digital signature on the receiver side, but the objectivity of the original on the receiver side can be obtained. It is possible to prevent non-repudiation of the transmission applicant assuming that the original is correct. In addition, since the original is confirmed after reception on the receiving side, it is possible to confirm whether there is falsification or the like inside the receiving side thereafter.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a system according to an embodiment.

FIG. 2 is a flowchart showing a flow of processing of an application form receiving unit 5 of the embodiment.

FIG. 3 is an original data creation unit 9 and a secondary original data storage unit 11 according to the embodiment;
3 is a flowchart showing the flow of the processing of FIG.

[Explanation of symbols]

5: Application form receiving section, 6: Application form, 7: Log, 8: Explanation,
9: Original copy creation unit, 10: Original copy of application form, etc., 11: Secondary original copy storage unit, 12: Encrypted original copy

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masanori Furuya 1099 Ozenji Temple, Aso-ku, Kawasaki City, Kanagawa Prefecture Inside the Hitachi, Ltd.System Development Laboratory (72) Inventor Satoshi Yashiro 1099 Ozenji Temple, Aso-ku, Kawasaki City, Kanagawa Prefecture (72) Inventor Junichi Miura 5-2-1, Omika-cho, Hitachi City, Ibaraki F-term (reference) 5B017 AA08 BA07 BB10 CA16 5J104 AA09 AA11 LA05 LA06 NA12 PA08 9A001 EE03 JJ07 JJ25 JJ34 LL03

Claims (5)

[Claims] 1. A computer which receives a digitized document input from the outside, adds a log including a time at which the digitized document was received to the digitized document, and collects the log corresponding to the digitized document into a digital form. A method for storing an original of an electronic document, wherein the original is signed and stored in a storage device. 2. The electronic document further includes, in addition to the log, a descriptive sentence indicating a situation when the electronic document is received,
2. The method according to claim 1, wherein the digital document, the corresponding log and the corresponding description are collectively digitally signed. 3. The method according to claim 1, wherein the digitized document, the log and the digital signature are collectively encrypted and stored in a storage device. 4. A computer system for externally inputting and receiving a digitized document, wherein the computer system adds a log including a time at which the digitized document was received to the input digitized document; An original document storage device comprising means for collectively applying a digital signature to a log corresponding to the digitized document and means for storing the digitalized document and a log thereof in a storage device. System to do. 5. The computer system further comprises means for collectively encrypting the electronic document, the log and the digital signature, and means for storing the encrypted information in a storage device. A system for storing an original of an electronic document according to claim 4.