JP7017868B2 - Program and timestamp management device - Google Patents

Description

The present invention relates to a program and a time stamp management device capable of managing time stamp tokens of an electronic file.

For example, a time stamp token is added to electronic data such as documents, images, videos, figures, and sounds, and proof that the electronic data existed at the date and time indicated by the time information included in the time stamp token (existence proof). , And time authentication technology that facilitates proof that the electronic data has not been tampered with after that date and time (integrity proof) has become widespread.

To explain this technique concretely by taking the case where the electronic data is document data as an example, the user generates a hash value of the document data contained in the document file and sends this hash value to a time authentication authority. Send and request the time stamp to be issued to the time certification body. In response to this, the time certification body generates a time stamp token by digitally signing the received hash value, time information indicating the time stamp issuance time, and the like. Then, the time certification body sends the time stamp token to the user who requested the issuance of the time stamp.

A user who receives a time stamp token from a time certification body adds the received time stamp token to a document file. For example, if the document file is a PDF file, the user can embed the time stamp token in the PDF file. As a result, the user can manage the document data and the time stamp token in a single document file.

In addition, a time stamp storage service that keeps time stamp tokens from users and stores them is currently being implemented by a specific institution. Specifically, the National Center for Industrial Property Information and Training (INPIT), an independent administrative agency, provides a time stamp storage service. Hereinafter, a specific institution that provides a time stamp storage service is referred to as a "time stamp storage institution". According to the time stamp storage service, the user can safely store the time stamp token for a long period of time by depositing it in the time stamp storage institution.

The following Patent Document 1 describes a technique for storing a hash value generated from an electronic file to be managed in a storage server operated by a public institution.

By the way, the time stamp storage service is provided to users by using technologies such as the Internet and web applications. A user can connect to a server of a time stamp storage organization via the Internet using a terminal device such as a personal computer, and send a time stamp token to be deposited to the server.

Specifically, the user first uses the application software installed in the terminal device to extract the time stamp token as a file from the electronic file to which the time stamp token to be deposited is added. Next, the user activates a web browser on the terminal device, accesses the website of the time stamp storage organization by the web browser, and displays a web page for depositing the time stamp token. The web page forms a form for specifying a time stamp token to be uploaded to the server of the time stamp storage organization and a form (upload button, etc.) for executing the upload of the specified time stamp token. The user specifies the time stamp token to be deposited by using the form for specifying the time stamp token to be uploaded. Then, the user presses the upload button to upload the specified time stamp token.

In addition, a form (memo field) in which a memo (text) about the specified time stamp token can be input is formed on the web page of the time stamp storage organization (for example, IMPIT) for depositing the time stamp token. ing. The user can enter a memo in the memo field after specifying the time stamp token to be uploaded and before executing the upload. The entered memo is uploaded to the server of the time stamp storage organization together with the specified time stamp token, and is stored in the server of the time stamp storage organization in the state associated with the time stamp token.

On the other hand, the user can obtain the deposited time stamp token from the time stamp storage organization. Specifically, the user accesses the website of the time stamp storage organization with a web browser, and displays a web page for downloading the deposited time stamp token from the server of the time stamp storage organization to the terminal device. The web page displays a list of time stamp tokens deposited by the user. The user can find and specify the time stamp token to be downloaded from the list, and download the specified time stamp token.

Further, in the above list, the file name of the deposited time stamp token and the above memo associated with the time stamp token are displayed for each time stamp token. The user can find out the time stamp token to download by referring to the displayed memo. In addition, a time stamp storage organization (for example, IMPIT) provides a function of searching for a time stamp token deposited by a user using a character string in a memo as a keyword. A user who has deposited a large number of time stamp tokens can use this function to find out which time stamp token to download.

Japanese Unexamined Patent Publication No. 2016-218554

As mentioned above, when the user downloads the deposited time stamp token from the server of the time stamp storage institution, the web page of the time stamp storage institution displays a list of the deposited time stamp tokens in the list. Displays the notes associated with the individual timestamp tokens deposited. These memos are entered by the user himself when uploading the time stamp token to the server of the time stamp storage organization.

When uploading the time stamp token to the server of the time stamp storage organization, if the user inputs a memo that accurately expresses the characteristics of the document file to which the time stamp token is attached, the deposited time stamp token When downloading from the server of the time stamp storage organization, the user can easily find the desired time stamp token from the list by using the memo as a clue. On the other hand, when uploading the time stamp token, if the user inputs a memo that does not accurately express the characteristics of the document file to which the time stamp token is attached, the deposited time stamp token is downloaded. At this time, it becomes difficult for the user to find the desired time stamp token from the list by using the memo as a clue. In this case, it may take a long time for the user to find the desired time stamp token in the list, and the user mistakenly specifies another time stamp token to download. There is a risk. Therefore, in order to make it easy to find the desired time stamp token from the list based on the memo when downloading the deposited time stamp token, the user should use the time stamp when uploading the time stamp token. You must enter a memo that accurately describes the characteristics of the document file to which the token is attached.

However, it is not easy to create a memo that accurately expresses the characteristics of a document file. Also, when uploading a time stamp token, it is troublesome to grasp the characteristics of the document file and create a memo to express it.

In addition, when multiple employees upload and download time stamp tokens in a company, etc., each employee extracts an arbitrary feature from various features of the document file when uploading the time stamp token. Creating a memo makes it difficult to find the desired time stamp token in the list using the memo as a clue when downloading the time stamp token. For example, if the characteristics of the document file extracted by the employee who created and entered the memo at the time of upload are unexpected characteristics for other employees who refer to the memo and download it, the employee who downloads it. Cannot determine the desired document file based on the memo, and may not be able to find the time stamp token corresponding to the document file in the list.

In the above Patent Document 1, a memo about the time stamp token is input when the time stamp token is deposited in the time stamp storage organization, and a memo is used when the deposited time stamp token is obtained from the time stamp storage organization. There is no mention of finding the desired timestamp token based on it.

The present invention has been made in view of, for example, the above-mentioned problems, and an object of the present invention is that it can support the input of a memo when depositing a time stamp token in a time stamp storage organization, and the time stamp token can be used as a time stamp token. It is an object of the present invention to provide a program and a time stamp management device capable of facilitating and speeding up the work of depositing a deposit in a stamp storage organization and the work of acquiring a deposited time stamp token from the time stamp storage organization.

In order to solve the above problems, the first program of the present invention uses a computer provided with a storage unit including a clipboard, which is a temporary storage area for temporarily storing data, and a display unit as a time stamp management device. It is a program to make it function, and the hash value calculated by the hash value calculation unit that calculates the hash value of the main body data included in the main body file and the hash value calculated by the hash value calculation unit are sent to the time stamp issuing organization, and the hash value is set. A time stamp token acquisition unit that receives the included time stamp token from the time stamp issuing organization, and a plurality of features that indicate the characteristics of the main body file after receiving the time stamp token by the time stamp token acquisition unit. The feature description data generation unit that generates the feature description data that is the data obtained by combining characters or character strings, and the feature description data that stores the feature description data generated by the feature description data generation unit in the clipboard or displays it on the display unit. It is characterized in that the computer functions as a time stamp management device provided with an output unit.

The main body file means an electronic file such as a document file, an image file, a moving image file, a graphic file, or an audio file to which a time stamp token is added. Further, the main body data means the substantive data included in the electronic file. For example, when the main body file is a document file, the data of the document included in the document file is the main body data, and when the main body file is an image file, the data of the image included in the image file is the main body. It is data.

According to the time stamp management device realized by the first program of the present invention, the time stamp token for the main body file is obtained from the time stamp issuing organization, attached to the main body file, and then the time stamp token is attached. It is possible to support the input of a memo about the time stamp token when depositing it in the time stamp storage organization.

Specifically, the time stamp management device realized by the first program of the present invention automatically generates feature description data after receiving the time stamp token to be added to the main body file from the time stamp issuing organization. This is stored in the clipboard and displayed on the display unit (for example, the display). The feature description data is data in which a plurality of characters or character strings representing a plurality of feature items indicating the features of the main body file are combined. The feature description data can be used as it is as a memo to be input in the memo field in the web page of the time stamp storage organization for depositing the time stamp token described above. That is, after visually checking the feature description data displayed on the display unit, the user can enter the memo in the memo field by pasting the feature description data stored in the clipboard into the memo field. Can be completed. Since the feature description data is automatically generated, the user does not need to grasp the features of the main body file and express the grasped features as a character string in order to create a memo. Therefore, the user can easily and quickly deposit the time stamp token in the time stamp storage organization.

Further, the time stamp management device realized by the first program of the present invention generates feature description data by arithmetic processing. Therefore, the feature description data is generated according to a predetermined rule (that is, a preset program). Specifically, a predetermined feature is extracted from various features possessed by the main body file, and feature description data is generated. Therefore, in a company or the like, when a plurality of employees deposit the time stamp token in the time stamp storage organization, the feature description data generated by the time stamp management device realized by the first program of the present invention is used as a memo. By pasting it in the field, it is possible to form a memo that describes the characteristics of the main body file so that each employee can identify the main body file. That is, it is possible to avoid forming a memo that describes the characteristics of the main body file so that only some employees can identify the main body file. Therefore, when each employee obtains the deposited time stamp token from the time stamp storage organization, he / she can easily and quickly specify the desired time stamp token to be obtained based on the memo.

In order to solve the above problems, the second program of the present invention uses a computer provided with a storage unit including a clipboard, which is a temporary storage area for temporarily storing data, and a display unit as a time stamp management device. A time stamp token extraction unit that duplicates the time stamp token attached to the main body file and stores the duplicated time stamp token in a storage area other than the clipboard in the storage unit, and a time stamp token. This is data obtained by combining a plurality of characters or character strings representing a plurality of feature items indicating the characteristics of the main body file after the time stamp token duplicated by the extraction unit is stored in a storage area other than the clipboard in the storage unit. A time stamp management device including a feature description data generation unit that generates feature description data and a feature description data output unit that stores the feature description data generated by the feature description data generation unit in the clipboard or displays it on the display unit. It is characterized by making the computer function as.

According to the time stamp management device realized by the second program of the present invention, in the scene where the time stamp token added to the main body file is extracted from the main body file and the extracted time stamp token is deposited in the time stamp storage organization. It is possible to assist in entering a memo about the time stamp token.

Specifically, the time stamp management device realized by the second program of the present invention automatically generates feature description data after extracting the time stamp token from the main body file, and stores this in the clipboard . And it is displayed on the display. After visually checking the feature description data displayed on the display unit, the user completes the memo input work in the memo field by pasting the feature description data stored in the clipboard into the memo field. be able to. In this way, the user can easily and quickly deposit the time stamp token in the time stamp storage organization.

Further, according to the time stamp management device realized by the second program of the present invention, as with the time stamp management device realized by the first program of the present invention, among various features of the main body file, predetermined Features can be extracted to generate feature description data. Therefore, in a company or the like, when a plurality of employees deposit the time stamp token in the time stamp storage organization, the feature description data generated by the time stamp management device realized by the second program of the present invention is noted as a memo. By pasting it in the field, it is possible to avoid forming a memo that describes the characteristics of the main body file so that only some employees can identify the main body file. Therefore, when each employee obtains the deposited time stamp token from the time stamp storage organization, he / she can easily and quickly specify the desired time stamp token to be obtained based on the memo.

Further, in the first or second program of the present invention described above, the feature description data generation unit is acquired by the feature item acquisition unit and the feature item acquisition unit that acquire a plurality of feature items from the feature item acquisition source, respectively. It is provided with a character string generation unit that generates a plurality of characters or character strings that represent each of the plurality of characteristics, and a character string concatenation unit that combines a plurality of characters or character strings generated by the character string generation unit. The acquisition source preferably includes the meta information of the main body file or the attribute information of the main body file.

According to this aspect of the present invention, the feature description data that accurately expresses the features of the main body file is generated by generating the feature description data using the feature items acquired from the meta information or the attribute information of the main body file. Can be done. In addition, by generating a plurality of characters or character strings representing a plurality of feature items and combining them to generate feature description data, it is possible to easily generate feature description data that can be used as a memo as it is. can.

Further, in the above-mentioned first or second program of the present invention, the feature description setting information including the information indicating the feature matter acquisition source designated by the user and the feature matter designated by the user is clipboarded in the storage unit. It is stored in a storage area that is not , and the feature item acquisition unit selects a feature item acquisition source and a plurality of feature items based on the feature description setting information, and selects the plurality of features from the selected feature item acquisition source. It is preferable to acquire the matter.

According to this aspect of the present invention, the feature description data generation unit can generate feature description data using the feature items specified by the user acquired from the feature item acquisition source designated by the user. .. Therefore, by pasting the feature description data generated in this way as a memo in the memo field, the main body can be easily identified by each individual user or each employee in a company or the like. It is possible to form a memo that describes the characteristics of the file.

Further, in the first or second program of the present invention described above, a plurality of feature description setting information according to the type of the main body file is stored in a storage area other than the clipboard in the storage unit, and the feature matter acquisition unit is the main body. As a configuration that recognizes the file type, selects the feature description setting information according to the recognized main body file type, and selects the feature item acquisition source and multiple feature items based on the selected feature description setting information. May be good.

According to this aspect of the present invention, even if the characteristics of the main body file capable of discriminating the main body file differ depending on the type of the main body file, the user is realized by the first or second program of the present invention. By pasting the feature description data generated by the time stamp management device into the memo field as a memo, a memo that describes the characteristics of the main file so that the main file can be identified for each type of main file. Can be formed.

Further, in the first or second program of the present invention described above, the character string replacement setting information that defines the correspondence between the search character string and the replaced character string is stored in a storage area other than the clipboard in the storage unit, and is described above. If the feature description data contains a search character string, the feature description data generation unit replaces the search character string with the corresponding replaced character string based on the character string replacement setting information. It also has a replacement section.

According to this aspect of the present invention, the user specifies, for example, a name having a risk of secret leakage in the search character string, and specifies a word corresponding to the name in the character string after replacement. Thereby, the names and the like having a risk of secret leakage can be removed from the feature description data. Then, the user can remove the name or the like having a risk of secret leakage from the memo by pasting the feature description data as a memo in the memo field. In addition, the user may shorten the memo by specifying a long or difficult-to-read term in the search character string and specifying a short or easy-to-read abbreviation or abbreviation of the term in the replaced character string. You can, or you can make the memo easier to read.

In order to solve the above problems, the first time stamp management device of the present invention is a time stamp management device including a storage unit including a clipboard, which is a temporary storage area for temporarily storing data, and a display unit. Therefore, the hash value calculation unit that calculates the hash value of the main unit data included in the main unit file and the hash value calculated by the hash value calculation unit are sent to the time stamp issuing organization, and the time stamp token containing the hash value is sent. After receiving the time stamp token by the time stamp token acquisition unit received from the time stamp issuing organization and the time stamp token acquisition unit, multiple characters or character strings representing multiple characteristics indicating the characteristics of the main body file are combined. It is equipped with a feature description data generation unit that generates feature description data, which is the data that has been created, and a feature description data output unit that stores the feature description data generated by the feature description data generation unit in the clipboard or displays it on the display unit. It is characterized by being.

In order to solve the above problems, the second time stamp management device of the present invention is a time stamp management device including a storage unit including a clipboard, which is a temporary storage area for temporarily storing data, and a display unit. Therefore, the time stamp token extraction unit that duplicates the time stamp token attached to the main body file and stores the duplicated time stamp token in a storage area other than the clipboard in the storage unit, and the time stamp token extraction unit use the time stamp token extraction unit. Feature description data that generates feature description data that is data obtained by combining multiple characters or character strings that represent multiple feature items that indicate the features of the main body file after the data is stored in a storage area other than the clipboard in the storage unit. It is characterized by including a generation unit and a feature description data output unit that stores the feature description data generated by the feature description data generation unit in the clipboard or displays it on the display unit.
Further, in the second program of the present invention or the second time stamp management device described above, the time stamp management device includes a verification unit for verifying whether or not the main file has been tampered with, and extracts the time stamp token. As a result of verification by the verification unit, the unit duplicates the time stamp token attached to the main body file and stores the duplicated time stamp token in a storage area other than the clipboard in the storage unit when the main body file has not been tampered with. If the main file has been tampered with as a result of verification by the verification unit, the duplicate storage process may not be performed.

According to the present invention, it is possible to support the input of a memo when depositing a time stamp token in a time stamp storage organization. This makes it possible to facilitate and speed up the work of depositing the time stamp token in the time stamp storage organization and the work of acquiring the deposited time stamp token from the time stamp storage organization.

It is a block diagram which shows the time authentication system which includes the terminal apparatus which functions as the time stamp management apparatus realized by the program of embodiment of this invention. It is a block diagram which shows the terminal apparatus which functions as the time stamp management apparatus realized by the program of embodiment of this invention. It is explanatory drawing which shows the structure of the main body file. It is explanatory drawing which shows the other structure of the main body file. It is explanatory drawing which shows the content of the feature description data in embodiment of this invention. It is explanatory drawing which shows the web page for depositing a time stamp token. It is a flowchart which shows the time stamp addition processing in embodiment of this invention. It is a flowchart which shows the time stamp extraction process in embodiment of this invention. It is explanatory drawing which shows the feature matter acquisition source and the feature matter about a main body file. It is explanatory drawing which shows the content of the feature description setting file in embodiment of this invention. It is a flowchart which shows the feature description data generation processing in embodiment of this invention. It is explanatory drawing which shows the content of the character string replacement setting file in embodiment of this invention. It is a flowchart which shows the character string replacement process in embodiment of this invention. It is explanatory drawing which shows the specific example of the generation of the feature description data in embodiment of this invention.

(Time authentication system)
FIG. 1 shows a time authentication system 1. In FIG. 1, the time authentication system 1 includes a time stamp issuing server 2, a time distribution server 3, an electronic authentication management server 4, a time stamp storage server 5, and a terminal device 6. These are connected to each other so as to be able to communicate with each other via a computer network 7 such as the Internet.

The time stamp issuing server 2 is provided in a time certification body (TSA) as a time stamp issuing body, and issues a time stamp. That is, when the user transmits the hash value of the main body data 42 included in the main body file 41 (see FIG. 3 or 4) from the terminal device 6 to the time stamp issuing server 2 and requests the issuance of the time stamp. The time stamp issuing server 2 generates the time stamp token 43 by digitally signing the hash value transmitted from the terminal device 6 and the time information indicating the time stamp issuing time. Further, the time stamp issuing server 2 adds the digital certificate of the time authentication authority to the time stamp token 43. Then, the time stamp issuing server 2 transmits the time stamp token 43 to the terminal device 6 of the user who requested the issuance of the time stamp. The user adds the time stamp token 43 transmitted from the time stamp issuing server 2 to the main body file 41. On the other hand, the time distribution server 3 is provided in the time distribution organization (TAA), distributes the time to the time authentication organization, and audits the clock of the time authentication organization. Further, the electronic authentication management server 4 is provided in the electronic authentication organization (CA) and issues and revokes the electronic certificate.

The time stamp storage server 5 is provided in the time stamp storage organization and stores the time stamp token 43. That is, when the user transmits the time stamp token 43 from the terminal device 6 to the time stamp storage server 5 and requests the storage of the time stamp token 43, the time stamp storage server 5 uses the time stamp transmitted from the terminal device 6. Store the token 43. Further, when the user requests the transmission of the time stamp token 43, the time stamp storage server 5 transmits the stored time stamp token 43 to the terminal device 6 of the user who requested the transmission of the time stamp token 43. do.

(Terminal device)
FIG. 2 shows a terminal device 6 that functions as a time stamp management device realized by the program of the embodiment of the present invention. The terminal device 6 is a terminal device used by a user and has the following functions.
(1) Function as a viewer to display the contents of the main body data 42 included in the main body file 41 (2) Function to add a time stamp token 43 to the main body file 41 (3) Main body file 41 to which the time stamp token 43 is added Function to extract the time stamp token 43 from (4) Function to verify whether or not the main body file 41 has been tampered with based on the time stamp token 43 (5) Feature description data 51 representing the characteristics of the main body file 41 (see FIG. 5) The terminal device 6 is, for example, a personal computer, and includes an arithmetic processing unit 11, a temporary storage unit 12, an operation unit 13, a display unit 14, a communication unit 15, and an external storage unit 16. The arithmetic processing unit 11 is, for example, a CPU (Central Processing Unit). The temporary storage unit 12 is a storage device that can be directly accessed by the arithmetic processing unit 11 and is used for reading and writing data and the like required for processing performed by the arithmetic processing unit 11, and is, for example, a main storage device. The operation unit 13 is, for example, a keyboard, a pointing device, or the like. The display unit 14 is a display device such as a display. The communication unit 15 is a communication control circuit for communicating with other devices via the computer network 7. The external storage unit 16 is a storage device used for long-term storage of data and the like, and is, for example, a hard disk. Although not shown, the terminal device 6 includes a port for connecting a portable external storage device such as a USB (universal serial bus) memory, an optical disk drive device, and the like.

Further, the arithmetic processing unit 11 includes a browsing control unit 21, a hash value calculation unit 22, a time stamp token acquisition unit 23, a time stamp token addition unit 24, a feature description data generation unit 25, a feature description data output unit 27, and a verification unit 28. And a time stamp token extraction unit 29 is provided. These are realized by having the arithmetic processing unit 11 read and execute the program of the embodiment of the present invention for making the computer function as a time stamp management device.

The browsing control unit 21 has a function of displaying the contents of the main body data 42 included in the main body file 41 on the display unit 14. The hash value calculation unit 22 has a function of calculating the hash value of the main body data 42 included in the main body file 41 in the time stamp token addition process described later. In the time stamp token addition process, the time stamp token acquisition unit 23 transmits the hash value calculated by the hash value calculation unit 22 to the time stamp issuing server 2 of the time authentication organization, and the time stamp token 43 including the hash value. Has a function of receiving from the time stamp issuing server 2. The time stamp token addition unit 24 has a function of adding the time stamp token 43 to the main body file 41. The feature description data generation unit 25 has a function of generating feature description data 51 in the time stamp token addition process and the time stamp token extraction process, which will be described later. As will be described later, the feature description data generation unit 25 includes a feature item acquisition unit 31, a character string generation unit 32, a character string combination unit 33, and a character string replacement unit 34. The feature description data output unit 27 stores the feature description data 51 generated by the feature description data generation unit 25 in the temporary storage unit 12 and displays it on the display unit 14 in the time stamp token addition process and the time stamp token extraction process. Has the function of The verification unit 28 has a function of verifying whether or not the main body file 41 has been tampered with after the time indicated by the time information included in the time stamp token 43 in the time stamp token extraction process. Further, the verification unit 28 has a function of verifying the digital certificate attached to the time stamp token 43 attached to the main body file 41. The time stamp token extraction unit 29 has a function of extracting the time stamp token 43 added to the main body file 41 from the main body file 41 and storing the extracted time stamp token 43 in the external storage unit 16 in the time stamp token extraction process. Have.

(Main body file)
3 and 4 show the structure of the main file 41. Specifically, FIG. 3 shows the structure of the main body file 41 when the main body file 41 is an ordinary file that is not a packaged PDF (registered trademark) file, and FIG. 4 shows the case where the main body file 41 is a packaged PDF file. The structure of the main body file 41 is shown.

The main body file 41 is an electronic file such as a document file, an image file, a moving image file, a graphic file, or an audio file to which the time stamp token 43 is added. When the electronic file to which the time stamp token 43 is attached is a packaged PDF file described later, the packaged PDF file is the main body file 41.

As shown in FIG. 3, the main body file 41 includes main body data 42, meta information 44, and attribute information 45. Further, when the time stamp token 43 is added to the main body file 41, the main body file 41 includes the time stamp token 43.

The main body data 42 is substantive data included in the main body file 41. For example, when the main body file 41 is a document file, the document data included in the document file is the main body data 42, and when the main body file 41 is an image file, the image data included in the image file is. This is the main body data 42.

The meta information 44 is data indicating formal or additional matters relating to the main body file 41. The items of the matters indicated by the meta information 44 differ depending on the type of the main body file 41. For example, when the main body file 41 is a document file, the items of the items indicated by the meta information 44 are the creation date and time, the creator, the update date and time, the updater, the title, the subject, and the like of the main body file 41. When the main body file 41 is an image file, the items of the items indicated by the meta information 44 are the image shooting date and time, the image copyright, the image size, the image width, the image height, and the image resolution. , Camera manufacturer, camera aperture value, camera ISO sensitivity, shutter speed, etc. When the main body file 41 is a moving image file, the items indicated by the meta information 44 include the frame width, frame height, data speed, total bit rate, frame rate, and the like of the moving image.

The attribute information 45 is data indicating the attributes of the main body file 41. The attribute information 45 includes data indicating usage restrictions (whether or not it is read-only) of the main body file 41, data indicating display restrictions (whether or not it is a hidden file) of the main body file 41, and the like.

On the other hand, the bag PDF file is a composite file formed by attaching one or more attachments to the PDF file. According to the package PDF file, a plurality of attached files are attached to the package PDF file, and the hash value of the data including the actual data such as the document data in the package PDF file body and the plurality of attached files is included. By adding the time stamp token to the package PDF file, it is possible to collectively prove the existence and completeness of a plurality of attached files attached to the package PDF file based on the time stamp token. ..

When the main body file 41 is a packaged PDF file, the main body file 41 contains the main body data 46, the attached file management information 47, one or more attached files 48, the meta information 49, and the attribute information 50, as shown in FIG. It is included. Further, when the time stamp token 43 is added to the main body file 41, the main body file 41 includes the time stamp token 43. The text data 46 is substantive data such as document data included in the bag PDF file body. The attached file management information 47 is data related to the management of the attached file attached to the packaged PDF file. The attached file management information 47 includes the reception number, category, purpose / use, registrant, attached file name, etc. of the attached file 48. The attached file 48 is an electronic file such as a document file, an image file, a moving image file, a graphic file, or an audio file attached to the package PDF file. The meta information 49 and the attribute information 50 are the same as the meta information 44 and the attribute information 45 of the main body file 41 which is not the package PDF file.

(Characteristic description data)
FIG. 5 shows an example of the feature description data 51. Specifically, it shows a state in which the feature description data 51 is opened by a text editor. The feature description data 51 is data in which a plurality of characters or character strings representing a plurality of feature items indicating the features of the main body file 41 are combined. The feature description data 51 is text data. The characters or character strings in the feature description data 51 are hiragana, kana, kanji, numbers, punctuation marks, commas, alphabets, symbols, symbols, and the like, and are not particularly limited. For example, in the feature description data 51 shown in FIG. 5, "2017/2/15" is a character string representing a feature item indicating the feature of the main body file 41. Further, the "T product plan" is also a character string representing the feature items indicating the features of the main body file 41. Further, "◯" is a character representing a feature item indicating the feature of the main body file 41. On the other hand, "update date", "title" and "read-only" are character strings directly specified by the user as described later, and "," is a delimiter. In the feature description data 51, "update date", "2017/2/15", "title", "T product plan", "read-only" and "○" are combined with "," in between. .. For convenience of explanation, in the description of the following embodiments, the "character string" includes not only an array of a plurality of characters but also a single character.

As will be described later, the feature description data 51 is automatically generated by the terminal device 6 in the time stamp token addition process or the time stamp token extraction process. Further, as described below, the user can use the feature description data 51 as a memo to be input to the memo field 92 when depositing the time stamp token 43 in the time stamp storage organization.

(Deposit of time stamp token)
FIG. 6 shows the procedure for depositing the time stamp token 43 to the time stamp storage organization. The user deposits the time stamp token 43 in the time stamp storage organization by the following procedure, for example.

First, the user executes the time stamp token addition process or the time stamp token extraction process described later by the terminal device 6. As a result, the time stamp token 43 is stored as a file in the external storage unit 16, and the feature description data 51 is stored in the temporary storage area (for example, the clipboard) in the temporary storage unit 12.

Next, the user starts a web browser on the terminal device 6, accesses the website of the time stamp storage organization by the web browser, and deposits the time stamp token 43 on the web page (hereinafter referred to as "this". The deposit page ") is displayed. As shown in (1) in FIG. 6, a designation button 91 for designating a time stamp token is formed on the deposit page.

Next, the user presses the designated button 91 (clicks with the mouse). As a result, a window for designating the time stamp token is displayed, and the user uses the window to specify the time stamp token 43 stored in the external storage unit 16. When the user has completed the specification of the time stamp token 43, the file name of the time stamp token 43 specified by the user is displayed on the deposit page as shown in (2) in FIG. 6, and the time is displayed. A memo field 92 for the stamp token 43 is formed. Any character string (text) can be input as a memo in the memo field 92.

Next, the user pastes, for example, the feature description data 51 stored in the clipboard into the memo field 92. As a result, as shown in (3) in FIG. 6, the feature description data 51 is input to the memo field 92 as a memo.

When it is desired to deposit a plurality of time stamp tokens 43 at one time, the user can (a) execute the time stamp token addition process or the time stamp token extraction process by the terminal device 6, and (b) execute the time stamp token 43. The designation and (c) pasting of the feature description data 51 to the memo field 92 are repeated. (4) in FIG. 6 shows a deposit page after the work of (a), (b) and (c) is repeated three times by the user.

Next, the user presses the upload button (deposit execution button) 93 formed in the deposit page. As a result, the three time stamp tokens 43 designated by the user and the data (text data) of the three memos about them are uploaded (sent) to the time stamp storage server 5. The uploaded time stamp token 43 and the data of the memo about the uploaded time stamp token 43 are stored in the time stamp storage server 5 in a state of being associated with each other.

When acquiring the deposited time stamp token 43 from the time stamp storage organization, the user activates a web browser on the terminal device 6, accesses the website of the time stamp storage organization by the web browser, and deposits the time stamp token 43. A web page for downloading the time stamp token 43 from the time stamp storage server 5 to the terminal device 6 is displayed. The web page displays a list of time stamp tokens 43 deposited by the user, and the file name and memo of the time stamp token 43 are displayed in the list. The user can find and specify the desired time stamp token 43 based on the file name and the memo, and download the specified time stamp token. In addition, the user can search for the time stamp token 43 deposited by the user using the character string in the memo as a keyword.

(Timestamp token addition process)
FIG. 7 shows the time stamp token addition process. The time stamp token addition process is a process of adding the time stamp token 43 to the main body file 41 designated by the user. Further, in the time stamp token addition process, in addition to the process of adding the time stamp token 43 to the main body file 41, a process of storing the time stamp token 43 for deposit is performed. Further, in the time stamp token addition process, in addition to these processes, a process of generating the feature description data 51 of the main body file 41, storing the generated feature description data 51 in the clipboard, for example, and displaying the feature description data 51 on the display unit 14 is performed. Will be. According to the time stamp token addition process, the user can simultaneously add the time stamp token 43 to the main file 41 and prepare for depositing the time stamp token 43 in the time stamp storage organization.

The specific contents of the time stamp token addition process are as follows. That is, when the user operates the operation unit 13, specifies the desired main body file 41 stored in the external storage unit 16, and inputs an instruction to execute the time stamp token addition process to the terminal device 6, the time stamp is entered. The token addition process is started.

As shown in FIG. 7, in the time stamp token addition process, the arithmetic processing unit 11 first selects the main body file 41 designated by the user (step S1). Subsequently, the hash value calculation unit 22 calculates the hash value of the main body data 42 of the selected main body file 41 (step S2).

Subsequently, the time stamp token acquisition unit 23 transmits the hash value calculated by the hash value calculation unit 22 and the time stamp issuance request to the time stamp issuance server 2 (step S3). Then, the time stamp token acquisition unit 23 receives the time stamp token 43 transmitted by the time stamp issuing server 2 in response to the time stamp issuing request (step S4).

Subsequently, the time stamp token addition unit 24 generates a copy of the received time stamp token 43, and then adds the received time stamp token 43 to the main body file 41 selected in step S1 (step S5). .. Further, the time stamp token addition unit 24 stores the copied time stamp token 43 in the external storage unit 16 as a time stamp token for deposit (step S6).

Subsequently, the feature description data generation unit 25 generates the feature description data 51 of the main body file 41 selected in step S1 and stores it in the external storage unit 16 (step S7).

Subsequently, the feature description data output unit 27 stores the generated feature description data 51 in the temporary storage area (for example, the clipboard) of the temporary storage unit 12 (step S8). Further, the feature description data output unit 27 displays the generated feature description data 51 on the display unit 14 (step S9).

(Timestamp token extraction process)
FIG. 8 shows the time stamp token extraction process. The time stamp token extraction process is a process of extracting the time stamp token 43 from the main body file 41 to which the time stamp token 43 is added. Further, in the time stamp token extraction process, the presence or absence of falsification of the main body file 41 is verified before the time stamp token 43 is extracted. Further, in the time stamp token extraction process, in addition to these processes, a process of generating the feature description data 51 of the main body file 41, storing the generated feature description data 51 in the clipboard, for example, and displaying the feature description data 51 on the display unit 14 is performed. Will be.

The specific contents of the time stamp token extraction process are as follows. That is, when the user operates the operation unit 13, specifies the desired main body file 41 stored in the external storage unit 16, and inputs an instruction to execute the time stamp token extraction process to the terminal device 6, the time stamp is entered. The token extraction process is started.

As shown in FIG. 8, in the time stamp token extraction process, the arithmetic processing unit 11 first selects the main body file 41 designated by the user (step S21). Subsequently, the verification unit 28 verifies whether or not the selected main body file 41 has been tampered with (step S22). Specifically, the verification unit 28 calculates the hash value of the main body data 42 in the main body file 41. Then, the verification unit 28 compares the calculated hash value with the hash value (hash value at the time of issuing the time stamp) included in the time stamp token 43 added to the main body file 41. Then, when both hash values match, the verification unit 28 determines that the main body file 41 has not been tampered with after the date and time indicated by the time information included in the time stamp token 43. On the other hand, when both hash values do not match, the verification unit 28 determines that the main body file 41 has been tampered with after the above date and time. The verification unit 28 also verifies the validity of the digital certificate of the time certification body attached to the time stamp token 43. Specifically, the verification unit 28 determines whether the expiration date of the digital certificate has not expired, whether the signature of the digital certificate is normal, and whether the digital certificate has expired for a reason other than the expiration date. Etc. are judged. If the main file 41 has been tampered with, or if the digital certificate is invalid, the time stamp token extraction process is stopped. In this case, the time stamp token 43 is not extracted from the main body file 41, and the feature description data 51 is not generated.

When the main body file 41 has not been tampered with and the digital certificate has validity, the time stamp token extraction unit 29 extracts the time stamp token 43 from the main body file 41 selected in step S21. That is, the time stamp token extraction unit 29 duplicates the time stamp token 43 added to the main body file 41, and stores the duplicated time stamp token 43 in the external storage unit 16 (step S23).

Subsequently, the feature description data generation unit 25 generates the feature description data 51 of the main body file 41 selected in step S21 and stores it in the external storage unit 16 (step S24).

Subsequently, the feature description data output unit 27 stores the generated feature description data 51 in the temporary storage area (for example, the clipboard) of the temporary storage unit 12 (step S25). Further, the feature description data output unit 27 displays the generated feature description data 51 on the display unit 14 (step S26).

(Generation of feature description data)
The feature description data 51 is automatically generated by the feature description data generation process. The feature description data generation process is executed in the time stamp token addition process (step S7 in FIG. 7). Further, the feature description data generation process is also executed in the time stamp token extraction process (step S24 in FIG. 8).

The feature description data generation process is executed by the feature description data generation unit 25 of the terminal device 6. As shown in FIG. 2, the feature description data generation unit 25 includes a feature item acquisition unit 31, a character string generation unit 32, a character string combination unit 33, and a character string replacement unit 34. As described above, the feature description data 51 is data in which a plurality of character strings representing a plurality of feature items indicating the features of the main body file 41 are combined. In order to generate such feature description data 51, the feature item acquisition unit 31 performs a process of acquiring a plurality of feature items indicating the features of the main body file 41 from the feature item acquisition source. Further, the character string generation unit 32 performs a process of generating a plurality of character strings representing each of the plurality of feature items acquired by the feature item acquisition unit 31. Further, the character string combining unit 33 performs a process of combining a plurality of character strings generated by the character string generation unit 32. Further, the character string replacement unit 34 performs a character string replacement process of replacing the search character string in the feature description data 51 with the corresponding replaced character string.

FIG. 9 shows a feature item acquisition source and a feature item. The feature item acquisition source is a feature item acquisition source indicating the features of the main body file 41. As shown in FIG. 9, when the main body file 41 is not a bag PDF file, the feature acquisition source is, for example, the meta information 44 of the main body file 41 and the attribute information 45 of the main body file 41 (see FIG. 3). When the main body file 41 is a packaged PDF file and there is only one attached file, the feature acquisition source is the meta information 44 of the attached file 48 and the attribute information 45 of the attached file 48. When the main body file 41 is a package PDF file and the number of attached files is two or more, the feature item acquisition source is the attached file management information 47 possessed by the main body file 41.

The feature items are each item included in the feature item acquisition source, that is, the meta information 44 of the main body file 41, the attribute information 45 of the main body file 41, the meta information 44 of the attached file 48, the attribute information 45 of the attached file 48, And each item included in the attached file management information 47 possessed by the main body file 41 which is a package PDF file. For example, as shown in FIG. 9, the feature items are the creation date and time included in the meta information 44 of the main body file 41, and the usage restrictions (whether or not they are read-only) included in the attribute information 45 of the main body file 41. Yes, it is a category or the like included in the attached file management information 47.

(Feature description setting file)
FIG. 10 shows an example of the contents of the feature description setting file 55. The user can arbitrarily specify the feature matter acquisition source of the feature matter described as the feature description data 51, the feature matter, and the number of output characters of the character string corresponding to the feature matter. The specified contents of the feature matter acquisition source, the feature matter and the number of output characters by the user are stored in the external storage unit 16 as the feature description setting file 55. In the feature description data generation process, the feature description data generation unit 25 generates the feature description data 51 based on the feature description setting file 55. The feature description setting file 55 is a specific example of the feature description setting information.

As shown in FIG. 10, in the feature description setting file 55, the feature matter acquisition source designated by the user, the feature matter designated by the user from the feature matter acquisition sources, and the characters corresponding to the feature matter are included in the feature description setting file 55. Multiple combinations consisting of the number of output characters in the column are recorded. For example, No. 1 in FIG. 2 "meta information, update date and time 10" indicates that the feature item acquisition source is the meta information 44 of the main body file 41 or the attached file 48, the feature item is the update date and time, and the number of output characters is 10. There is. The number of output characters means a fixed number of characters (counted in half-width characters) of a character string representing one feature item described as a part of the feature description data 51. When the number of characters in the character string representing one feature item is larger than the number of output characters, the portion of the character string corresponding to the number of output characters is described as a part of the feature description data 51. On the other hand, when the number of characters in the character string representing one feature is smaller than the number of output characters, a blank is inserted in the portion less than the number of output characters.

Further, the user can directly specify a character string to be described as a part of the feature description data 51. When the user directly specifies a character string to be described as a part of the feature description data 51, the feature description setting file 55 contains a command "directly specify the character string" and a character to be described as a part of the feature description data 51. The column itself and the number of characters in the string are recorded. For example, No. 1 in FIG. "Character string direct designation, update date and time, 8" in 1 indicates that the character string "update date and time" is described as a part of the feature description data 51.

Further, the user can set the delimiter used in the feature description data 51, the maximum number of characters of the feature description data 51, the storage location of the feature description setting file 55, and the file name of the feature description setting file 55. These settings are also recorded in the feature description setting file 55. In the feature description data generation process, a plurality of character strings representing the feature items and a combination of a plurality of directly designated character strings are described as the feature description data 51. The delimiter is a character indicating a plurality of character strings representing characteristic items and a character string indicating a delimiter for each character string of a plurality of directly specified character strings. The maximum number of characters is the maximum number of characters of the entire character string (that is, the entire character string after combination) that can be described as the feature description data 51. The maximum number of characters is set to, for example, the maximum number of characters that can be input in the memo field 92.

The user operates the terminal device 6 to specify in advance the feature item acquisition source and the feature item of the feature item to be described as the feature description data 51. When the user specifies these feature item acquisition sources and feature items, the terminal device 6 generates the feature description setting file 55 and stores it in the external storage unit 16.

Further, the user can specify different specifications for each type of the main body file 41 with respect to the feature item acquisition source and the feature items of the feature items described as the feature description data 51. For example, when the main body file 41 is not a packaged PDF file, the feature acquisition source is the meta information 44 of the main body file 41 and the attribute information 45 of the main body file 41, whereas the main body file 41 is the packaged bag PDF file. When there are two or more attached files, the feature acquisition source is the attached file management information 47 possessed by the main body file 41. Further, the item of meta information is different depending on whether the main body file 41 is a document file or the main body file 41 is an image file. As described above, the feature item acquisition source or the feature item differs depending on the type of the main body file 41. The terminal device 6 generates a plurality of feature description setting files 55 for each type of the main body file 41 according to the designation by the user, and stores them in the external storage unit 16.

(Characteristic description data generation process)
FIG. 11 shows the specific contents of the feature description data generation process. In the feature description data generation process, a character string representing a feature item or a character string corresponding to a command directly specified by the character string is combined with a delimiter in between to generate the feature description data 51. In this generation process, a storage area for arranging character strings is formed in the storage area of the temporary storage unit 12. This storage area is called a "feature description data generation area".

In the feature description data generation process shown in FIG. 11, first, the feature description data generation unit 25 forms the feature description data generation area in the storage area of the temporary storage unit 12 (step S31).

Subsequently, the feature item acquisition unit 31 recognizes the type of the main body file 41 selected in the time stamp token addition process (step S1 in FIG. 7) or the time stamp token extraction process (step S21 in FIG. 8) (step S1 in FIG. 7). Step S32).

Subsequently, the feature item acquisition unit 31 selects the feature description setting file 55 according to the type of the recognized main body file 41, and reads the selected feature description setting file 55 from the external storage unit 16 (step S33).

Subsequently, the feature item acquisition unit 31 selects one character string generation unit in the selected feature description setting file 55 (step S34). As described above, in the feature description setting file 55, the feature matter acquisition source specified by the user, the feature matter specified by the user from the feature matter acquisition sources, and the character string corresponding to the feature matter are contained in the feature description setting file 55. Multiple combinations consisting of the number of output characters are recorded. Further, in the feature description setting file 55, a combination of a command for directly specifying a character string, a character string itself described as a part of the feature description data 51, and the number of characters in the character string is recorded in the feature description setting file 55. Has been done. The "character string generation unit" means each of these combinations. For example, No. 1 in FIG. "Character string direct designation, update date and time, 8" in 1 corresponds to one character string generation unit, and No. 1 in FIG. 2 "meta information, update date and time, 10" corresponds to one character string generation unit. The feature item acquisition unit 31 selects a character string generation unit according to the order of the character string generation units recorded in the selected feature description setting file 55.

Subsequently, the feature item acquisition unit 31 determines whether or not the command for directly specifying the character string is included in the selected character string generation unit (step S35).

When the selected character string generation unit includes a command for directly specifying the character string (step S35: YES), the feature item acquisition unit 31 transfers the character string itself corresponding to the command from the feature description setting file 55. Read (step S36).

Subsequently, the character string joining unit 33 writes the read character string in the feature description data generation area (step S37). Specifically, when the character string has not been written in the feature description data generation area at all, the character string joining unit 33 writes the read character string at the beginning of the feature description data generation area. On the other hand, when the character string (including the delimiter character) has already been written in the feature description data generation area, the character string joining unit 33 has already written the read character string in the feature description data generation area. Write immediately after the end of the string. Since the read character string is written immediately after the end of the character string already written in the feature description data generation area, the read character string is combined with the character string already written in the feature description data generation area. To.

On the other hand, when the selected character string generation unit does not include the command for directly specifying the character string (step S35: NO), the feature item acquisition unit 31 is the feature item acquisition source included in the selected character string generation unit. And according to the features, select the feature acquisition source and select the features included in the selected feature acquisition source. Then, the feature matter acquisition unit 31 refers to the selected feature matter acquisition source (for example, meta information 44 or attribute information 45, etc.) in the main body file 41, and determines whether or not the selected feature matter (for example, update date / time or read-only). (Shown data, etc.) is read (step S38).

Subsequently, the character string generation unit 32 generates a character string (text data) corresponding to the read feature item (step S39). If the read feature item is text data in the first place, step S39 is skipped.

Subsequently, the character string joining unit 33 writes the character string corresponding to the feature item in the feature description data generation area (step S40). Specifically, when the character string has not been written in the feature description data generation area at all, the character string joining unit 33 writes the character string corresponding to the feature item at the beginning of the feature description data generation area. On the other hand, when a character string (including a delimiter) has already been written in the feature description data generation area, the character string joining unit 33 has already written the character string corresponding to the feature item in the feature description data generation area. Write immediately after the end of the string. The character string corresponding to the feature item is written immediately after the end of the character string already written in the feature description data generation area, so that the character string corresponding to the feature item is already written in the feature description data generation area. Combined with a column.

Subsequently, the feature item acquisition unit 31 determines whether or not the processing from steps S34 to S40 has been completed for all the character string generation units in the feature description setting file 55 selected in step S33 (step S41).

If the processing from steps S34 to S40 has not been completed for all the character string generation units in the feature description setting file 55 selected in step S33 (step S41: NO), the character string joining unit 33 moves to step S33. The delimiter recorded in the selected feature description setting file 55 is read, and this delimiter is added immediately after the end of the character string already written in the feature description data generation area (step S42). After that, the process returns to step S34, and in step S34, the feature item acquisition unit 31 selects the next one character string generation unit in the feature description setting file 55, and the processes from steps S35 to S40 are executed.

On the other hand, when the processing from steps S34 to S40 is completed for all the character string generation units in the feature description setting file 55 selected in step S33 (step S41: YES), the character string replacement unit 34 replaces the character string. The process is executed (step S43).

When the character string replacement process is completed, the feature description data 51 is completed. The feature description data generation unit 25 stores the completed feature description data 51 in the external storage unit 16 (step S44).

(Character string replacement process)
FIG. 12 shows an example of the character string replacement setting file 57 used in the character string replacement process, and FIG. 13 shows the specific contents of the character string replacement process. The character string replacement process is a process of replacing a specific character string in the character string of the feature description data 51 with another character string according to the user's specification. The user can specify the character string before replacement and the character string after replacement. The specified contents of the character string before replacement and the character string after replacement by the user are stored in the external storage unit 16 as the character string replacement setting file 57. In the character string replacement process, the character string replacement unit 34 performs the character string replacement process based on the character string replacement setting file 57.

As shown in FIG. 12, in the character string replacement setting file 57, the character string before replacement specified by the user is recorded as a search character string, and the character string after replacement is recorded as a character string after replacement. The search character string and the replaced character string are recorded in association with each other. The character string replacement setting file 57 is a specific example of the character string replacement setting information.

The character string replacement process is executed in the feature description data generation process (step S43 in FIG. 11). The specific contents of the character string replacement process are as follows. That is, as shown in FIG. 13, the character string replacement unit 34 first reads one search character string from the character string replacement setting file 57 (step S51). Subsequently, the character string replacement unit 34 searches for the search character string in the combined character string written in the feature description data generation area (step S52). Then, when the search character string is found in the combined character string written in the feature description data generation area (step S53: YES), the replacement corresponding to the search character string is performed from the character string replacement setting file 57. The post-character string is read, and the search character string in the combined character string written in the feature description data generation area is replaced with the read and replaced character string (step S54). The character string replacement unit 34 performs the processes from steps S51 to S54 for all the search character strings recorded in the character string replacement setting file 57. After that, the character string replacement unit 34 displays the replacement result on the display unit 14 in order to make the user confirm the replacement result (step S55: YES, step S56).

(Specific example of feature description data generation)
FIG. 14 shows a specific example of generation of feature description data 51 for a main body file 41 that is not a bag PDF file. As shown in FIG. 14, first, in the feature description data generation process, writing (combining the character strings) of the character string based on the feature description setting file 55 to the feature description data generation area is executed. Specifically, since the first character string generation unit in the feature description setting file 55 includes a command for directly specifying a character string and a character string of "update date and time", the character string "update date and time" is used. It is written at the beginning of the feature description data generation area.

Next, in the feature description data generation area, "," is written as a delimiter immediately after the character string "update date and time".

Next, the second character string generation unit in the feature description setting file 55 includes the meta information 44 as the feature matter acquisition source, and includes the update date and time as the feature matter. The update date and time of the main body file 41 in the meta information 44 of the main body file 41 is February 15, 2017. Therefore, the character string "2017/2/15" is written immediately after the delimiter in the feature description data generation area.

Next, in the feature description data generation area, "," is written as a delimiter immediately after the character string "2017/2/15".

Next, since the third character string generation unit in the feature description setting file 55 includes a command for directly specifying the character string and the character string of the "title", the character string "title" is used to generate the feature description data. Written immediately after the last delimiter in the area.

Next, in the feature description data generation area, "," is written as a delimiter immediately after the character string "title".

Next, the fourth character string generation unit in the feature description setting file 55 includes meta information 44 as a feature matter acquisition source, and includes a title as a feature matter. Further, the title of the main body file 41 in the meta information 44 of the main body file 41 is the TimePro plan. Therefore, the character string "TimePro plan" is written immediately after the last delimiter in the feature description data generation area.

Next, in the feature description data generation area, "," is written as a delimiter immediately after the character string "TimePro plan".

Next, since the fifth character string generation unit in the feature description setting file 55 includes a command for directly specifying the character string and a "read-only" character string, the character string "read-only" is the feature description. Written immediately after the last delimiter in the data generation area.

Next, in the feature description data generation area, "," is written as a delimiter immediately after the character string "read-only".

Next, the sixth character string generation unit in the feature description setting file 55 includes attribute information as a feature item acquisition source, and data indicating usage restrictions (read-only or not) as feature items. .. Further, the data indicating the usage restriction of the main body file 41 in the attribute information 45 of the main body file 41 is ◯ (○ indicates that there is a usage restriction). Therefore, the character string "○" is written immediately after the last delimiter in the feature description data generation area. As a result, the writing of the character string based on the feature description setting file 55 to the feature description data generation area is completed.

Next, the character string is replaced based on the character string replacement setting file 57. In the character string replacement setting file 57, the character string "TimePro" is recorded as the search character string, and the character string "T product" is recorded as the corresponding replacement character string. Further, the character string "TimePro" is included in the character string 59 written in the feature description data generation area at this stage. Therefore, "TimePro" is replaced with "T product". As a result, the feature description data 51 is completed. That is, the completed feature description data 51 is "update date / time, 2017/2/15, title, T product plan, read-only, ◯".

As described above, the terminal device 6 functioning as the time stamp management device realized by the program of the embodiment of the present invention automatically generates the feature description data 51 of the main body file 41 in the time stamp token granting process. The generated feature description data 51 is stored in the temporary storage area (for example, the clipboard) and displayed on the display unit 14. As a result, the user obtains the time stamp token 43 for the main body file 41 from the time authentication organization, adds it to the main body file 41, and then deposits the time stamp token 43 in the time stamp storage organization. The feature description data 51 of the main body file 41 can be obtained. After confirming the contents of the feature description data 51 by looking at the display unit 14, the user, for example, puts the feature description data 51 stored in the clipboard in the memo field 92 (see FIG. 6) in the deposit page of the time stamp storage organization. By pasting, the work of inputting a memo into the memo field 92 can be completed. Since the user does not need to grasp the features of the main body file 41 and express the grasped features with a character string in order to create a memo, the work of depositing the time stamp token 43 in the time stamp storage organization is performed. It can be done easily and quickly.

Further, the terminal device 6 according to the embodiment of the present invention automatically generates the feature description data 51 of the main body file 41 in the time stamp token extraction process, and stores the generated feature description data 51 in a temporary storage area (for example, a clipboard). It is stored and displayed on the display unit 14. As a result, the user extracts the time stamp token 43 added to the main body file 41 from the main body file 41, and deposits the extracted time stamp token 43 in the time stamp storage organization. In this situation, the feature description data 51 of the main body file 41 Can be obtained. As a result, the user can complete the work of inputting the memo in the memo field 92 by pasting the feature description data 51 in the memo field 92 after checking the feature description data 51 by looking at the display unit 14. Therefore, the work of depositing the time stamp token 43 in the time stamp storage organization can be easily and quickly performed.

Further, the terminal device 6 in the embodiment of the present invention generates the feature description data 51 using the feature items acquired from the meta information 44 or the attribute information 45 of the main body file 41. As a result, the feature description data 51 that accurately expresses the features of the main body file 41 can be generated. Therefore, when the user inputs the feature description data 51 as a memo in the memo field 92 when depositing the time stamp token 43 in the time stamp storage institution, the user obtains the deposited time stamp token 43 from the time stamp storage institution. , The main body file 41 corresponding to the time stamp token 43 can be easily and accurately determined based on the memo. Therefore, the user can easily and quickly acquire the deposited time stamp token 43 from the time stamp storage organization.

Further, according to the terminal device 6 in the embodiment of the present invention, a plurality of character strings representing each of the plurality of feature items are generated, and the plurality of character strings are combined to generate the feature description data 51. Therefore, the main body file 41 is provided. It is possible to generate feature description data 51 that expresses the features of the above in a multifaceted manner.

Further, the terminal device 6 in the embodiment of the present invention generates the feature description data 51 based on the feature description setting file 55 in which the specified contents such as the feature matter acquisition source and the feature matter by the user are recorded. As a result, the terminal device 6 can generate the feature description data 51 using the feature items specified by the user, which are acquired from the feature item acquisition source designated by the user. Therefore, by pasting the feature description data 51 generated in this way as a memo in the memo field, each user or each employee in the company or the like can create the main body file 41 corresponding to the time stamp token 43. It is possible to form a memo in which the features of the main body file 41 that can be easily identified are described.

Further, the terminal device 6 in the embodiment of the present invention generates a plurality of feature description setting files 55 for each type of the main body file 41 in advance, and when the feature description data 51 is generated, the feature description setting files 55 are included in the plurality of feature description setting files 55. Select the feature description setting file 55 according to the type of the main body file 41, and generate the feature description data 51 based on the selected feature description setting file 55. Thereby, even if the characteristics of the main body file 41 capable of discriminating the main body file 41 differ depending on the type of the main body file 41, the characteristics of the main body file 41 capable of discriminating the main body file 41 are described. The feature description data 51 can be generated. Therefore, when the user inputs the feature description data 51 as a memo in the memo field 92 when depositing the time stamp token 43 in the time stamp storage institution, the user obtains the deposited time stamp token 43 from the time stamp storage institution. , Various main body files 41 can be easily and accurately discriminated based on the memo.

Further, the terminal device 6 in the embodiment of the present invention replaces the search character string in the feature description data 51 (character string written in the feature description data generation area) with the replacement character string according to the user's designation. As a result, the user can specify, for example, a name with a risk of secret leakage in the search character string, and specify a word corresponding to the name without risk of secret leakage in the character string after replacement. Dangerous names and the like can be removed from the feature description data 51. Then, the user can remove the name or the like having a risk of secret leakage from the memo by pasting the feature description data 51 as a memo in the memo field 92. Further, the user can easily form a memo, an easy-to-read memo, a short memo, etc. that meet the input restrictions of the memo field 92 by appropriately setting the search character string and the replaced character string.

In the above-described embodiment, the case where the feature description data 51 is generated for each main body file 41 is taken as an example, but a plurality of feature description data 51 are uniformly generated for each of the plurality of main body files 41. You may do so. In this case, an external file describing the file names of the plurality of main body files 41 and the plurality of feature description data 51 so that the correspondence between the plurality of main body files 41 and the plurality of feature description data 51 can be grasped. The file names of the plurality of main body files 41 and the plurality of feature description data 51 are displayed in a storage unit 16 so that the correspondence between the plurality of main body files 41 and the plurality of feature description data 51 can be grasped. It is preferable to display it on the unit 14.

Further, in the above-described embodiment, the meta information 44, the attribute information 45, and the attached file management information 47 of the main body file 41 are given as examples as the feature item acquisition source of the main body file 41, but the feature matter acquisition source of the main body file 41 is given. Is not limited to these. For example, information indicating the verification result of whether or not the main body file 41 has been tampered with may be used as a feature item acquisition source.

Further, in the above-described embodiment, the case where the main body file 41 and the digital certificate are verified before the time stamp token 43 is extracted from the main body file 41 in the time stamp token extraction process has been given as an example. May not be done.

Further, in the terminal device 6, the function of adding the time stamp token 43 to the main body file 41, the function of extracting the time stamp token 43 from the main body file 41, or the function of generating and outputting the feature description data 51 is provided in the main body file 41. It may be integrated with the function as a viewer for displaying the contents of the main body data 42 included in. That is, when the content of the main body data 42 is displayed on the display unit 14, the main body file 41 displaying the content of the main body data 42 is subjected to a time stamp token addition process (feature description data generation / output process). (Including), or may be automatically selected as the target of the time stamp token extraction process (including the generation / output process of feature description data).

Further, in the above-described embodiment, the case where the feature description data 51 is used as a memo to be input to the memo field 92 of the web page of the time stamp storage organization for depositing the time stamp token 43 has been described, but the feature description data 51 has been described. The use of is not limited to this. For example, an employee of a company or the like can use the feature description data 51 to manage the time stamp token 43 in the company.

Further, the terminal device that functions as a time stamp management device by the program of the present invention is not limited to a personal computer, and may be another type of terminal device such as a tablet terminal or a smartphone.

Further, the present invention can be appropriately modified within the scope of the claims and within a range not contrary to the gist or idea of the invention that can be read from the entire specification, and the program and the time stamp management device accompanied by such changes are also the present invention. It is included in the technical idea of.

The present invention can be used as a technical means for supporting the work of depositing a time stamp token in a time stamp storage organization.

2 Timestamp issuing server 5 Timestamp storage server 6 Terminal device 12 Temporary storage unit 14 Display unit 16 External storage unit 22 Hash value calculation unit 23 Timestamp token acquisition unit 24 Timestamp token addition unit 25 Feature description data generation unit 27 Feature description Data output unit 29 Timestamp token extraction unit 31 Feature information acquisition unit 32 Character string generation unit 33 Character string combination unit 34 Character string replacement unit 41 Main unit file 42 Main unit data 43 Timestamp token 44 Meta information 45 Attribute information 47 Attachment management information 48 Attached file 51 Feature description data 55 Feature description setting file (feature description setting information)
57 Character string replacement setting file

Claims (10)

A program for making a computer equipped with a storage unit including a clipboard, which is a temporary storage area for temporarily storing data, and a display unit, function as a time stamp management device.
A hash value calculation unit that calculates the hash value of the main unit data included in the main unit file, and
A time stamp token acquisition unit that transmits the hash value calculated by the hash value calculation unit to the time stamp issuing organization and receives a time stamp token containing the hash value from the time stamp issuing organization.
After receiving the time stamp token by the time stamp token acquisition unit, a feature that generates feature description data which is data obtained by combining a plurality of characters or character strings representing a plurality of feature items indicating the features of the main body file. Descriptive data generator and
To make the computer function as the time stamp management device including the feature description data output unit that stores the feature description data generated by the feature description data generation unit in the clipboard or displays it on the display unit . Characterized program. A program for making a computer equipped with a storage unit including a clipboard, which is a temporary storage area for temporarily storing data, and a display unit, function as a time stamp management device.
A time stamp token extraction unit that duplicates the time stamp token attached to the main body file and stores the duplicated time stamp token in a storage area other than the clipboard in the storage unit.
After the time stamp token duplicated by the time stamp token extraction unit is stored in the storage area other than the clipboard in the storage unit, a plurality of characters or a plurality of characters each representing a plurality of feature items indicating the characteristics of the main body file or A feature description data generator that generates feature description data that is data that combines character strings,
To make the computer function as the time stamp management device including the feature description data output unit that stores the feature description data generated by the feature description data generation unit in the clipboard or displays it on the display unit . Characterized program. The feature description data generation unit is
The feature item acquisition unit that acquires the plurality of feature items from the feature item acquisition source, respectively,
A character string generation unit that generates a plurality of characters or character strings representing the plurality of feature items acquired by the feature item acquisition unit, and a character string generation unit.
It is provided with a character string joining unit that joins the plurality of characters or character strings generated by the character string generating unit.
The program according to claim 1 or 2, wherein the feature acquisition source includes meta information of the main body file or attribute information of the main body file. The feature description setting information including the information indicating the feature item acquisition source designated by the user and the information indicating the feature item designated by the user is stored in the storage unit in the storage area other than the clipboard .
The feature item acquisition unit selects the feature item acquisition source and the plurality of feature items respectively based on the feature description setting information, and acquires the selected plurality of feature items from the selected feature item acquisition source. The program according to claim 3. A plurality of the feature description setting information corresponding to the type of the main body file are stored in the storage area other than the clipboard in the storage unit .
The feature matter acquisition unit recognizes the type of the main body file, selects the feature description setting information corresponding to the recognized type of the main body file, and based on the selected feature description setting information, the feature matter acquisition source and the feature matter acquisition source. The program according to claim 4, wherein each of the plurality of features is selected. The character string replacement setting information that defines the correspondence between the search character string and the replaced character string is stored in the storage unit in the storage unit in a storage area other than the clipboard .
When the feature description data includes a search character string, the feature description data generation unit replaces the search character string with the corresponding replaced character string based on the character string replacement setting information. The program according to any one of claims 3 to 5, further comprising a character string replacement unit. It is equipped with a verification unit that verifies whether the main body file has been tampered with.
As a result of the verification by the verification unit, the time stamp token extraction unit duplicates the time stamp token added to the main body file and stores the duplicated time stamp token when the main body file has not been tampered with. A claim characterized in that a duplicate storage process for storing in a storage area other than the clipboard is performed in the unit, and the duplicate storage process is not performed when the main body file is tampered with as a result of verification by the verification unit. The program described in Item 2. A time stamp management device including a storage unit including a clipboard, which is a temporary storage area for temporarily storing data, and a display unit.
A hash value calculation unit that calculates the hash value of the main unit data included in the main unit file, and
A time stamp token acquisition unit that transmits the hash value calculated by the hash value calculation unit to the time stamp issuing organization and receives a time stamp token containing the hash value from the time stamp issuing organization.
After receiving the time stamp token by the time stamp token acquisition unit, a feature that generates feature description data which is data obtained by combining a plurality of characters or character strings representing a plurality of feature items indicating the features of the main body file. Descriptive data generator and
A time stamp management device including a feature description data output unit that stores the feature description data generated by the feature description data generation unit in the clipboard or displays the feature description data on the display unit. A time stamp management device including a storage unit including a clipboard, which is a temporary storage area for temporarily storing data, and a display unit.
A time stamp token extraction unit that duplicates the time stamp token attached to the main body file and stores the duplicated time stamp token in a storage area other than the clipboard in the storage unit.
After the time stamp token is stored in the storage area other than the clipboard by the time stamp token extraction unit, a plurality of characters or character strings representing a plurality of feature items indicating the characteristics of the main body file are stored. A feature description data generator that generates feature description data that is combined data,
A time stamp management device including a feature description data output unit that stores the feature description data generated by the feature description data generation unit in the clipboard or displays the feature description data on the display unit. It is equipped with a verification unit that verifies whether the main body file has been tampered with.
As a result of the verification by the verification unit, the time stamp token extraction unit duplicates the time stamp token added to the main body file and stores the duplicated time stamp token when the main body file has not been tampered with. A claim characterized in that a duplicate storage process for storing in a storage area other than the clipboard is performed in the unit, and the duplicate storage process is not performed when the main body file is tampered with as a result of verification by the verification unit. Item 9. The time stamp management device according to Item 9.

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