JP2022028369A - Data transmit/receive system, data transmit/receive method, data receive device, data receive method, and data receive program - Google Patents

Abstract

To provide a data transmit/receive system and a method and a data receive device, a method and a program with which, when submitting reports via a network, it is possible to conduct impartial deadline management taking increase in communication time into account.SOLUTION: There is provided a data transmit/receive system equipped with a data transmit device and a data receive device. The data transmit device comprises an identification information unit for holding identification information, a data specific value generation unit for generating a first data specific value, a first transmit unit for transmitting the first identification information and the first data specific value, and a second transmit unit for transmitting second identification information, with the data transmitted after the first data specific value is transmitted. The data receive unit comprises a first reception processing unit for acquiring date/time information, a storage unit for storing the first identification information, the first data specific value and the date/time information, and a second reception processing unit for generating a second data specific value on the basis of the data and when the first data specific value and the second data specific value agree, acknowledging the corresponding date/time information as submission date/time.SELECTED DRAWING: Figure 10

Description

The present invention relates to a technique for transmitting / receiving and receiving data such as files, and particularly to a technique for transmitting / receiving / receiving data such as homework and reports for which a submission deadline is set via a network.

In recent years, the flow of "informatization of education" has been advancing in the field of education, and with the development of ICT (Information and Communication Technology), the flow is accelerating more and more, and distance learning using ICT. The implementation of is also widely discussed. Some distance classes are held at major preparatory schools and cram schools, and some are also used for lectures for working adults at universities.

Reports on homework and assignments (hereinafter referred to simply as "assignments") imposed on students and students in distance learning are usually in the form of digitized data and are online via networks such as the Internet. It will be submitted at. Online submission of reports (hereinafter referred to as "online submission") is not limited to distance learning, but is also used for submitting reports for assignments given in face-to-face university lectures. In particular, smartphones have become widespread these days, and even if you do not own a personal computer, some students do own a smartphone, making it possible to submit online.

Reports to be submitted usually have a deadline. In the case of online submission, a submission deadline is also set, and students and students will submit the report via the network by the submission deadline. In this case, it is necessary to manage the deadline such as whether the report was submitted on time (hereinafter referred to as "deadline management") because it has a great influence on the grades and evaluations of students and students.

For example, in Japanese Patent Application Laid-Open No. 2002-297011 (Patent Document 1), deadline management is performed as one of the functions of the distance learning system. The distance learning system described in Patent Document 1 is a system in which an educational institution such as a university and an individual are connected via a communication network such as the Internet, and a lecture package containing video and audio data related to the lecture can be distributed. The period and the writable period on the electronic bulletin board related to the lecture are set. There is also a deadline for students to submit lecture-related reports, quizzes, and other assignments. Students confirm the theme of the report displayed on the screen of their personal computer, the questions of the quiz, and the deadline for submission, and send the answer data to the center server. At this time, if the submission deadline has already passed when the response data is sent from the student, the receipt of the response data will be refused.

Further, Japanese Patent Application Laid-Open No. 2015-15688 (Patent Document 2) discloses a technique relating to a method of managing report data submitted by a student. The system described in Patent Document 2 manages the submission of submitted reports within the deadline and the submission outside the deadline, sets the report acceptance end date and time of the report file submitted from the student terminal, and the report is the report acceptance end date and time. It is judged whether or not it has been submitted by. If it is determined that the report file has been submitted by the report acceptance end date and time, it is saved as a file within the submission deadline, and if it is submitted after the report acceptance end date and time, it is saved as a file outside the submission deadline.

Japanese Unexamined Patent Publication No. 2002-297011 Japanese Unexamined Patent Publication No. 2015-15688

However, in recent years, the number of reports submitted with images, moving images, etc. has increased, and some reports have a large capacity such as several hundred Mbytes or more. When communicating such a large amount of data via a network at home, on the move, or on the go, troubles due to the communication environment may occur. One of the troubles is the problem of communication time. Although the communication speed of the network is increasing year by year, it may take time to communicate a large amount of data due to the increase in traffic due to access concentration, the speed of the line directly connected to the terminal, and the like. In addition, depending on the contract details of smartphones, etc., an upper limit is set on the amount of data that can be used for high-speed network communication every month, and if the upper limit is exceeded, the communication speed will be limited and the speed will be slower. There is. This limit is often applied near the contract deadline (usually the last day of each month), so if the deadline for submitting a report is set close to the contract deadline and the report is submitted just before the deadline, the report will be sent. In the worst case, the report may not be submitted in time.

The present invention has been made due to the above-mentioned circumstances, and an object of the present invention is data transmission / reception capable of fair deadline management in consideration of an increase in communication time when submitting a report via a network. It is an object of the present invention to provide a system, a data transmission / reception method, a data reception device, a data reception method, and a data reception program.

The present invention relates to a data transmission / reception system including a data transmission device for transmitting data for which a submission deadline is set via a network and a data reception device for receiving the data. Data in which the transmitting device generates an identification information unit that holds identification information for identifying the data and a data-specific value that is a value peculiar to the data based on the data and uses it as the first data-specific value. The peculiar value generation unit, the identification information as the first identification information, the first transmission unit that transmits the first data peculiar value together with the first identification information, and the identification information as the second identification information, the second. A second transmission unit for transmitting the data together with the identification information is provided, the data is transmitted after the transmission of the first data-specific value, and the data receiving device transmits the first data-specific value and the first data. 1 The first reception processing unit that receives the identification information and acquires the date and time information related to the transmission and reception of the first data peculiar value is associated with the first identification information, the first data peculiar value, and the date and time information. The storage unit to be stored, the data and the second identification information are received, and the data-specific value is generated based on the received data to obtain the second data-specific value, which is stored in the storage unit. Among the first identification information, the first data peculiar value corresponding to the first identification information, which is the same value as the second identification information, and the second data peculiar value are compared, and the first data peculiar value and the first data peculiar value are compared. When the second data-specific values match, it is achieved by providing a second reception processing unit that recognizes the corresponding date and time information as the submission date and time.

The present invention also relates to a data transmission / reception method executed in a data transmission / reception system including a data transmission device for transmitting data for which a submission deadline is set via a network and a data reception device for receiving the data. The object of the present invention is to generate a data-specific value which is a value peculiar to the data based on the holding step in which the data transmitting device holds the identification information for identifying the data and the data. A data-specific value generation step as a first data-specific value, a first transmission step in which the identification information is used as the first identification information and the first data-specific value is transmitted together with the first identification information, and the first transmission step. After that, the identification information is used as the second identification information, and the second transmission step of transmitting the data together with the second identification information is executed, and the data receiving device performs the first data specific value and the first identification. A first reception processing step for receiving information and acquiring date and time information related to transmission and reception of the first data peculiar value, and a storage unit for storing the first data peculiar value and the date and time information in association with the first identification information. The storage step to be stored in the data and the second identification information are received, and the data specific value is generated based on the received data to obtain the second data specific value, which is stored in the storage unit. Among the first identification information, the first data peculiar value corresponding to the first identification information, which is the same value as the second identification information, and the second data peculiar value are compared, and the first data peculiar value is compared. When the second data-specific value matches, the second reception processing step of certifying the corresponding date and time information as the submission date and time is executed.

Further, the present invention relates to a data receiving device that receives data for which a submission deadline is set via a network, and the above object of the present invention is a value peculiar to the data and is generated based on the data. The first reception that receives the first data-specific value, which is a data-specific value, together with the first identification information, which is the identification information for identifying the data, and acquires the date and time information related to the transmission / reception of the first data-specific value. The identification information is stored in a processing unit, a storage unit that stores the first identification information, the first data peculiar value, and the date and time information in association with each other, and the data transmitted after the transmission of the first data peculiar value. Of the first identification information stored in the storage unit, the data-specific value is generated based on the received data and received together with the second identification information to obtain the second data-specific value. The first data-specific value corresponding to the first identification information, which is the same value as the second identification information, is compared with the second data-specific value, and the first data-specific value and the second data-specific value match. If so, it is achieved by providing a second reception processing unit that certifies the corresponding date and time information as the submission date and time.

Further, the present invention relates to a data receiving method for receiving data for which a submission deadline is set via a network, and the above object of the present invention is a value peculiar to the data and is generated based on the data. The first reception that receives the first data-specific value, which is a data-specific value, together with the first identification information, which is the identification information for identifying the data, and acquires the date and time information related to the transmission / reception of the first data-specific value. The step, the storage step of storing the first data peculiar value and the date and time information in the storage unit in association with the first identification information, and the data transmitted after the transmission of the first data peculiar value are described. Among the first identification information stored in the storage unit, the data is received together with the second identification information, which is the identification information, and the data specific value is generated based on the received data to obtain the second data specific value. , The first data-specific value corresponding to the first identification information, which is the same value as the second identification information, and the second data-specific value are compared, and the first data-specific value and the second data-specific value are compared. If they match, it is achieved by having a second reception processing step that certifies the corresponding date and time information as the submission date and time.

Further, the above object of the present invention is achieved by a data receiving program for executing the above data receiving method.

According to the data transmission / reception system, the data transmission / reception method, the data reception device, the data reception method, and the data reception program of the present invention, it is not the data of the report for which the submission deadline is set, but is specific to the data generated based on the data. Since the submission date and time is certified by sending and receiving values, it is possible to reduce the delay in the submission date and time due to the length of communication time of large volumes of data. Also, by checking the match between the data-specific value sent and the data-specific value generated from the data in the report sent thereafter, it is determined that the transmitted data has not been changed. Can be done.

It is a figure which shows the structural example of the data transmission / reception system which concerns on this invention. It is a sequence diagram which shows the outline of the operation procedure example of a data transmission / reception system. It is a block diagram which shows the configuration example of a student terminal. It is an image diagram which shows the example of the progress table. It is a figure which shows an example of a part of the screen of a student terminal which displays the progress of a report. It is a flowchart which shows the operation example of the student terminal in the authentication process. It is a flowchart which shows the operation example of the student terminal in the provisional submission process. It is a flowchart which shows the operation example of the student terminal in the report submission processing. It is a flowchart which shows the operation example of the student terminal in the progress display of a report. It is a block diagram which shows the configuration example of a server. It is an image diagram which shows the example of the management table. It is a flowchart which shows the operation example of a server in an authentication process. It is a flowchart which shows the operation example of the server in the provisional submission process. It is a flowchart which shows a part of the operation example of a server in a report submission process. It is a flowchart which shows a part of the operation example of a server in a report submission process. It is a flowchart which shows the operation example of the server in management information acquisition processing. It is a block diagram which shows the configuration example of the terminal for teachers. It is a figure which shows the example of a part of the screen of the teacher terminal which displays the submission status of a report. It is a flowchart which shows the operation example of the teacher terminal in the provisional submission process. It is a flowchart which shows a part of the operation example of the teacher terminal in the report submission processing. It is a flowchart which shows a part of the operation example of the teacher terminal in the report submission processing. It is a flowchart which shows the operation example of the teacher terminal in the management information acquisition processing. It is a sequence diagram which shows the outline of the operation procedure example in the authentication process and the provisional submission process when the authentication system is prepared.

In the present invention, report data (hereinafter referred to as "report data") for which a submission deadline is set by a student or a student (hereinafter, simply referred to as "student") via a network such as the Internet is used. Data-specific values, which are values specific to report data and are generated based on report data, are used to certify the submission date and time when sending to a data receiving device such as a shared server. The data-specific value is a value generated in a small capacity such as several Kbytes or less even when the original data has a large capacity such as several hundred Mbytes or more. Further, when the original data is changed, the data-specific value generated from the data before the change and the data-specific value generated from the changed data are different values. If no changes are made to the original data, the data-specific values will always be the same.

In the present invention, the data-specific value (first data-specific value) is transmitted to the data receiving device before the report data is transmitted. The data receiving device sets the date and time (date and time information) related to the transmission and reception of the data-specific value, such as the reception date and time of the data-specific value, as the provisional submission date and time of the report (hereinafter referred to as "provisional submission date and time"). The report data body is transmitted to the data receiving device after transmitting the data-specific value. The data receiving device that received the report data generates a data-specific value (second data-specific value) from the received report data, compares it with the previously received data-specific value, and if both match, changes to the report data. Is not added, and the provisional submission date and time is recognized as the official submission date and time.

As described above, in the present invention, since the submission date and time is determined based on the date and time related to the transmission and reception of the small capacity data-specific value, even if the communication speed of the network is slow due to the limitation of the communication speed or the like, the communication of the data-specific value is performed. Can be done in a short time, and troubles such as delay in submission date and time and transmission error due to long communication time can be avoided. In addition, even after the submission deadline has passed, the report can be submitted within the time allowed by the faculty member or instructor (hereinafter referred to simply as "teacher"), so there is no restriction on the communication speed. It is possible to submit in consideration of the student's situation, such as sending it from time to time. Furthermore, since the submission date and time are officially recognized by matching the data-specific values, it is possible to prevent falsification of the report.

Even if the present invention is realized for a data transmission / reception system including a data transmission device for generating and transmitting data-specific values and transmission of report data and a data reception device for performing the above-mentioned processing, the above-mentioned processing is performed. It may be realized for a data receiving device. In the latter case, an existing product or the like may be used as a device for generating and transmitting data-specific values and transmitting report data.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a configuration example of a data transmission / reception system according to the present invention. The data transmission / reception system 1 of the present embodiment is a student terminal (data transmission device) used by students 2, a server (data reception device) 3 for managing reports submitted by students, and a teacher terminal 4 used by teachers. And they are connected via a network 5 composed of the Internet and the like.

In this embodiment, a hash value is used as a data-specific value. The hash value is a fixed-length value obtained from the original data by a certain calculation procedure, and the calculation procedure for obtaining the hash value is called a hash function. The hash value has a constant length regardless of the length of the original data, and the same hash value is always obtained from the same data. In practice, a hash value having a length of several bytes to several tens of bytes is often used, so even if the report data has a large capacity, the capacity of the hash value obtained from the report data is small. Among the hash functions, there is what is called a cryptographic hash function with added cryptographic performance, and in this embodiment, the hash value is obtained by using the cryptographic hash function. The hash value obtained from the cryptographic hash function becomes a completely different value when the input value changes even by one bit. Therefore, if the hash value obtained from the report data is sent and then the report data is modified and sent, the hash value obtained from the sent report data will be different from the hash value sent in advance. Therefore, it is possible to detect that a change has been made to the report. Cryptographic hash functions are "very difficult to infer the original data from a hash value", "given a hash value obtained from one input value, another input with that hash value". It also has the properties that it is very difficult to find a value (weak collision resistance) and that it is very difficult to find two different input values that have the same hash value (strong collision resistance). Therefore, it is applied as an elemental technology of security technology such as encryption, authentication, and digital signature, and a standard is also set. Among the standards, SHA (Secure Hash Algorithm) -2 is used in this embodiment.

If the report submission may be managed without asking for weak collision resistance or strong collision resistance, a hash function other than a cryptographic hash function may be used. If the management does not have to be stricter than that, a checksum or the like may be used as a data-specific value other than the hash value.

The data transmission / reception system 1 manages report data for a plurality of tasks imposed by a plurality of teachers on a plurality of students. Each student is given a student ID for identification, each teacher is given a teacher ID for identification, and each task is given a task ID for identification. In addition to using numbers and symbols as student IDs, faculty IDs, and assignment IDs, student names, faculty names, and assignment names may be used. Each report data managed by the data transmission / reception system 1 can be distinguished by specifying a student ID, a teacher ID, and an assignment ID. The faculty ID is not necessary to distinguish the report data when the assignment IDs that are duplicated among the faculty members are not used, or when the number of faculty members who use the data transmission / reception system 1 is one at the same time. Therefore, it can be omitted. Further, in the case where the data transmission / reception system 1 manages only one problem at the same time, the problem ID is not necessary for distinguishing the report data, and thus can be omitted.

The student terminal 2 is composed of a general-purpose information device having a communication function such as a personal computer, a tablet, and a smartphone, and is a dedicated application (application program) mounted on the student terminal 2 or a dedicated application and a general purpose. The functions described below are executed by combining the applications of. As the student terminal 2, a dedicated device may be used instead of a general-purpose information device. Further, a part of the functions executed by the student terminal 2 may be realized by Web access to the server 3.

The student terminal 2 obtains a hash value from the report data created by the student and transmits it to the server 3 via the network 5. After transmitting the hash value, the report data is transmitted to the server 3 via the network 5. In addition, the progress of each task for which a report should be submitted is displayed according to the request from the student who uses the student terminal 2. The student terminal 2 is basically prepared for each student, but one student terminal 2 may be shared by a plurality of students.

Since the server 3 receives a plurality of report data, the student ID, the teacher ID, and the assignment ID are required to identify the received report data as described above. However, the student ID is usually not kept secret and may be used and disguised by a third party other than the student. Therefore, in the data transmission / reception system 1, an access token is used instead of the student ID in the transmission of the report data from the student terminal 2 to the server 3. An access token is widely used in a web service, and is authentication information issued by a certificate authority to authenticate a user in order to use the web service, and is usually a random English word having a certain length. It will be paid out in numbers. The certificate authority is a Web server that holds information for authenticating the user and can authenticate the user, and the server 3 plays a role thereof. The server 3 authenticates the student who is the user based on the student ID and the preset password. The student terminal 2 transmits a student ID and password to the server 3, and the server 3 authenticates based on the transmitted student ID and password. When it is authenticated as an official user, an access token is generated and sent to the student terminal 2. As described above, in the transmission of the report data from the student terminal 2 to the server 3, the access token, the teacher ID and the assignment ID are used as identification information for identifying the report data. The access token, the teacher ID, and the assignment ID are also used as identification information in the transmission of the hash value from the student terminal 2 to the server 3. If the teacher ID and the assignment ID are optional, only the access token is used as the identification information. The details of the student terminal 2 will be described later.

The server 3 is a teacher's terminal that authenticates the student who submits the report, manages the hash value and report data transmitted from the student terminal 2, reports data and the managed information (hereinafter referred to as "management information"). Provide to 4. A general-purpose device is used as the server 3, and the above is performed by a dedicated application mounted on the server 3, or a combination of the dedicated application and the general-purpose application. As the server 3, a dedicated device may be used instead of a general-purpose device. Further, instead of preparing the server 3 for each system, the function of the server 3 may be provided as a cloud service. The details of the server 3 will be described later.

Like the student terminal 2, the teacher terminal 4 is composed of general-purpose information devices having communication functions such as a personal computer, a tablet, and a smartphone, and is a dedicated application mounted on the teacher terminal 4 or a dedicated device. By combining the above application and a general-purpose application, the report data transmitted from the server 3 is received, the management information held by the server 3 is displayed, and the like. As in the case of the student terminal 2, the teacher terminal 4 may use a dedicated device instead of a general-purpose information device, and a part of the functions executed by the teacher terminal 4 may be transferred to the server 3 on the Web. It may be realized by access. Further, the teacher terminal 4 may be prepared for each teacher or shared. The details of the teacher terminal 4 will be described later.

The outline of the operation procedure centering on the transmission / reception of data between the student terminal 2, the server 3, and the teacher terminal 4 in the data transmission / reception system 1 configured as described above will be described.

FIG. 2 is a sequence diagram showing an outline of an operation procedure example of the data transmission / reception system 1. The student who completes the report for the given task uses the student terminal 2 to send the hash value of the report data and the report data to the server 3. The teacher who gave the assignment uses the teacher terminal 4 to acquire the report data transmitted to the server 3. Although not shown, the student ID and password are associated and stored in advance in the server 3, and when the faculty member sets the assignment, the faculty ID, the assignment ID, and the submission deadline are associated with each other. Is remembered. Further, the teacher ID is stored in advance in the teacher terminal 4.

FIG. 2A shows a process for authenticating a student as an official user (hereinafter referred to as “authentication process”) and a process for transmitting and receiving a hash value of report data to determine a provisional submission date and time. It is a sequence diagram which shows the operation procedure example in (hereinafter referred to as "provisional submission processing").

First, the student terminal 2 inputs a student ID and a password and transmits them to the server 3 (step S1). The server 3 authenticates based on the received student ID and password, and when it authenticates that it is an official user, it generates an access token and sends it to the student terminal 2 together with the authentication result. If the user is not authenticated as an official user, an error is sent to the student terminal 2 as an authentication result. The student terminal 2 stores the received access token. The server 3 stores the generated access token in association with the student ID and password.

Next, the student terminal 2 inputs the faculty ID, the assignment ID, and the report data for the given assignment, obtains a hash value for the report data, and transmits the hash value to the server 3 together with the access token, the faculty ID, and the assignment ID (). Step S2).

The server 3 selects the received access token, teacher ID, and task ID from the stored access tokens, teacher IDs, and task IDs, stores hash values in association with them, and further receives them. The date and time of the change is specified, and it is also stored in association with the date and time information. This date and time information is the provisional submission date and time. Then, in order to notify the faculty terminal 4 that the hash value has been received, a notification notifying that fact (hereinafter referred to as "provisional submission notification") is sent to the faculty member together with the student ID and the assignment ID corresponding to the received access token. It is transmitted to the terminal 4 (step S3). Further, the date and time information and the submission deadline are compared, and the investigation result of whether or not the provisional submission date and time has passed the submission deadline is transmitted to the student terminal 2 together with the received hash value and the specified date and time information as the reception result. The student terminal 2 confirms the reception result and compares the received hash value with the transmitted hash value to confirm whether the hash value has been transmitted / received correctly. The received date and time information is retained for confirmation of progress. When it is not necessary to confirm whether the hash value has been transmitted / received correctly or when it is confirmed by other means, it is not necessary to transmit the hash value from the server 3 to the student terminal 2. In addition, when displaying the date and time information to confirm whether the submission deadline has passed, it is not necessary to investigate whether the submission deadline has passed.

FIG. 2B is a sequence diagram showing an example of an operation procedure of a process for transmitting / receiving report data (hereinafter referred to as “report submission process”).

After performing the provisional submission process, the student terminal 2 transmits the teacher ID, the assignment ID, and the report data for the assignment targeted for the provisional submission process to the server 3 together with the stored access token (step S4).

The server 3 obtains a hash value for the received report data, extracts a hash value corresponding to the received access token, the teacher ID, and the task ID from the stored hash values, and compares the hash values with the obtained hash values. If both hash values match, it is determined that no changes have been made to the report data, and the report data is stored and stored (for example, memory address, file name, etc.) (hereinafter referred to as "stored information"). ) Is stored in association with the access token, the teacher ID, and the assignment ID. Then, the date and time information that was supposed to be the provisional submission date and time is recognized as the official submission date and time. If both hash values do not match, it is determined that the report data has been changed and the report data is not stored. The comparison result of both hash values is transmitted to the student terminal 2. In addition, when both hash values match, in order to notify the teacher terminal 4 that the report data has been received, a notification notifying that fact (hereinafter referred to as "report submission notification") corresponds to the received access token. It is transmitted to the teacher terminal 4 together with the student ID and the assignment ID (step S5). Even if the two hash values do not match, the received report data may be stored and the teacher terminal 4 may be notified of the received report data.

The teacher terminal 4 that has received the report submission notification transmits the student ID, the teacher ID, and the assignment ID to the server 3 in order to acquire the report data corresponding to the notification (step S6). The server 3 identifies the report data based on the stored information corresponding to the received student ID, teacher ID, and assignment ID, and transmits the report data to the teacher terminal 4. If the report data to be acquired is not stored in the server 3, such as the faculty terminal 4 requesting the acquisition of the report data before receiving the report submission notification, the server 3 issues an error instead of the report data to the faculty terminal. Send to 4. The server 3 may transmit the report data to the teacher terminal 4 at the same time as the report submission notification. In this case, the above error does not occur.

FIG. 2C is a sequence diagram showing an example of an operation procedure of a process for transmitting / receiving management information (hereinafter referred to as “management information acquisition process”).

The teacher acquires the management information held by the server 3 via the teacher terminal 4 in order to confirm the progress of the task given by the teacher. The teacher terminal 4 transmits the teacher ID to the server 3 (step S7). The server 3 transmits the student ID, the assignment ID, the date / time information, and the status ID corresponding to the received teacher ID among the management information held to the teacher terminal 4. The status ID is a value assigned according to the submission status of the report.

The details of the student terminal 2 will be described.

FIG. 3 is a block diagram showing a configuration example of the student terminal 2. A general-purpose information device is used as the student terminal 2, and FIG. 3 shows only the components related to the present invention. This also applies to FIGS. 10 and 17, which show configuration examples of the server 3 and the teacher terminal 4 described later.

The student terminal 2 includes an identification information acquisition unit 21, an identification information storage unit 22, a data-specific value generation unit 23, a transmission unit 24 (first transmission unit) and 25 (second transmission unit), a transmission result confirmation unit 26, and progress. It includes a table storage unit 27 and a progress information acquisition unit 28. The identification information acquisition unit 21 is for authentication processing, the data-specific value generation unit 23 and transmission unit 24 are for provisional submission processing, the transmission unit 25 is for report submission processing, and the transmission result confirmation unit 26 is for provisional submission processing and report submission processing. Involved.

The identification information acquisition unit 21 inputs the student ID Sid and the password Pw input by the input function (keyboard, touch panel, etc.) of the student terminal 2 in the authentication process. For example, a login screen prompting the student to enter the student ID and password is displayed using a display function (display or the like) of the student terminal 2, and the student inputs the student ID and password. The identification information acquisition unit 21 transmits the input student ID Sid and password Pw to the server 3. Then, the authentication result Ar, which is the result of the authentication process on the server 3, is received. When the authentication result Ar is "OK" indicating that the student has been authenticated as an official user, the access token At transmitted together with the authentication result Ar is received and output to the identification information storage unit 22. If the authentication result Ar is "NG" indicating that the student has not been authenticated as an official user, a message indicating that fact ("not authenticated", etc.) is displayed on the student terminal 2. Display using the function.

The identification information storage unit 22 stores the access token At output from the identification information acquisition unit 21.

In the provisional submission process, the data-specific value generation unit 23 inputs the report data Rd and uses SHA-2 to generate the hash value Hv1 for the report data Rd. There are a plurality of types of SHA-2 depending on the length of the hash value to be generated, but the data-specific value generation unit 23 uses SHA-256 that generates a 256-bit hash value. The data-specific value generation unit 23 outputs the generated hash value Hv1 to the transmission unit 24 and the transmission result confirmation unit 26.

In the provisional submission process, the transmission unit 24 inputs the teacher ID Tid and the task ID Pid corresponding to the report data Rd input by the data specific value generation unit 23, which is input by the input function of the student terminal 2. Further, the access token At stored in the identification information storage unit 22 is read out, and the hash value Hv1 output from the data specific value generation unit 23 is input. Then, these are transmitted to the server 3. As the transmission method, a method realized as one of the functions of the dedicated application may be used, but the e-mail address is used as the teacher ID, and the access token At, the task ID Pid, and the hash value Hv1 are described in the e-mail. Alternatively, a method of sending an e-mail to an e-mail address that is a teacher ID may be used by using general-purpose e-mail software such as by attaching it.

In the report submission process, the transmission unit 25 inputs the report data Rd, the teacher ID Tid and the task ID Pid corresponding to the report data Rd, reads the access token At stored in the identification information storage unit 22, and reads them out as a server. Send to 3. As the transmission method, as in the transmission unit 24, a method using general-purpose e-mail software may be used in addition to the method realized as one of the functions of the dedicated application. That is, the e-mail address is used as the teacher ID, the access token At and the task ID Pid are described or attached to the e-mail, and the report data Rd is attached to the e-mail to the e-mail address which is the teacher ID. Send an email.

The progress table storage unit 27 stores a progress table for managing the progress of the report to be submitted. FIG. 4 is an image diagram showing an example of a progress table, in which the teacher ID, the assignment ID, the date and time information, and the progress ID are stored in association with each other. The progress ID is a value assigned according to the progress status. In the progress status, the report is completed and the hash value is sent, but the report data is not sent "waiting for data transmission", the hash value and the report data are sent "data sent", The hash value was sent, but the provisional submission date and time has passed the submission deadline, "expired", the hash value has been sent and received, an error has occurred, "submission error", and the hash value in the report submission process. There is a "data mismatch" situation in which a mismatch has occurred, and values 1 to 5 are sequentially assigned as progress IDs to each situation.

The transmission result confirmation unit 26 confirms the transmission results of the hash value Hv1 and the report data Rd transmitted to the server 3.

In the provisional submission process, the teacher ID Tid, the task ID Pid, and the hash value Hv1 input to the transmission unit 24 are also input to the transmission result confirmation unit 26. Further, after the access token At, the teacher ID Tid, the task ID Pid, and the hash value Hv1 are transmitted from the transmission unit 24 to the server 3, the reception result Rr, the hash value Hv2, and the date and time information Dt are transmitted from the server 3. The transmission result confirmation unit 26 receives them. The transmission result confirmation unit 26 compares the hash values Hv1 and Hv2, and if the values are different, determines that an error has occurred in the transmission / reception of the hash value, and sets the progress ID Aid to 4 (submission error). If the values are the same, check the reception result Rr. When the reception result Rr is "within the deadline" indicating that the provisional submission date and time is within the submission deadline, the progress ID Aid is set to 1 (waiting for data transmission), and "the provisional submission date and time has passed the submission deadline". In the case of "out of time limit", the progress ID Aid is set to 3 (expired). Then, the transmission result confirmation unit 26 stores the teacher ID Tid, the task ID Pid, the date and time information Dt, and the progress ID Aid in the progress table in the progress table storage unit 27. If the received access token At, teacher ID Tid, and task ID Pid are not appropriate, the server 3 transmits an error as the reception result Rr. Therefore, if the reception result Rr is an error, the transmission result confirmation unit 26 indicates that. Display a message ("inappropriate transmission data", etc.) using the display function of the student terminal 2. If the hash values Hv1 and Hv2 are different, a message indicating that fact (such as "an error has occurred in transmission / reception") may be displayed.

In the report submission process, the teacher ID Tid and the assignment ID Pid input to the transmission unit 25 are also input to the transmission result confirmation unit 26. Further, after the access token At, the teacher ID Tid, the task ID Pid, and the report data Rd are transmitted from the transmission unit 25 to the server 3, the comparison result Cr, which is the result of comparing the hash values, is transmitted from the server 3. The transmission result confirmation unit 26 inputs it. When the comparison result Cr is "match" indicating that the hash values match, the progress ID Aid is set to 2 (data has been transmitted), and when the comparison result Cr is "mismatch" indicating that the hash values do not match, the progress ID Aid is set. Is set to 5 (data mismatch). Then, the transmission result confirmation unit 26 updates the progress ID Aid corresponding to the input teacher ID Tid and task ID Pid to the progress table in the progress table storage unit 27. If the received access token At, teacher ID Tid, and task ID Pid are not appropriate, the server 3 transmits an error as the comparison result Cr. Therefore, if the comparison result Cr is an error, the transmission result confirmation unit 26 indicates that. Display a message ("inappropriate transmission data", etc.) using the display function of the student terminal 2. If the comparison result Cr is "mismatch", a message indicating that fact ("report has been changed", etc.) may be displayed.

The progress information acquisition unit 28 displays the progress status of the report to be submitted based on the progress table stored in the progress table storage unit 27. The input function of the student terminal 2 inputs a signal requesting display of the progress status (hereinafter referred to as “progress request signal”) Rqa to the progress information acquisition unit 28. For example, a progress status display button is displayed on the screen, and the progress request signal Rqa is generated by clicking or touching the button. The progress information acquisition unit 28 that has input the progress request signal Rqa reads out all the teacher IDs, assignment IDs, date / time information, and progress IDs stored in the progress table in the progress table storage unit 27. Then, the teacher name corresponding to the teacher ID, the task name corresponding to the task ID, the date and time information, and the progress status corresponding to the progress ID are displayed by the display function of the student terminal 2, for example, as shown in FIG. indicate. In FIG. 5, the assignment name is displayed in the “assignment” column, the faculty member name is displayed in the “submission destination” column, the date and time information is displayed in the “submission date and time” column, and the progress status is displayed in the “progress status” column. Regarding the correspondence between the faculty ID and the faculty name, the correspondence between the assignment ID and the assignment name, and the correspondence between the progress ID and the progress status, the correspondence between them is registered in the student terminal 2 in advance, and the correspondence is registered in the student terminal 2 at the time of display. Use correspondence. The information in the progress table may be displayed as it is without being converted into the faculty name, the assignment name, and the progress status.

In such a configuration of the student terminal 2, an operation example of the student terminal 2 in each process will be described with reference to the flowcharts of FIGS. 6 to 9.

First, an operation example in the authentication process will be described. FIG. 6 is a flowchart showing an operation example thereof.

The identification information acquisition unit 21 inputs the student ID Sid and password Pw input to the student terminal 2 (step S10), and transmits them to the server 3 (step S11). After that, the identification information acquisition unit 21 waits for the authentication result Ar to be transmitted from the server 3.

When the identification information acquisition unit 21 receives the authentication result Ar transmitted from the server 3 (step S12), the identification information acquisition unit 21 confirms the authentication result Ar. When the authentication result Ar is "OK" (step S13), the access token At transmitted from the server 3 is received (step S14) and stored in the identification information storage unit 22 (step S15). When the authentication result Ar is "NG" (step S13), a message indicating that is displayed (step S16).

Next, an operation example in the provisional submission process will be described. FIG. 7 is a flowchart showing an operation example thereof.

The data-specific value generation unit 23 inputs the report data Rd (step S20) and generates the hash value Hv1 by SHA-256 (step S21). The generated hash value Hv1 is output to the transmission unit 24 and the transmission result confirmation unit 26.

The transmission unit 24 inputs the hash value Hv1 and the teacher ID Tid and the task ID Pid, reads out the access token At stored in the identification information storage unit 22, and reads the access token At, the teacher ID Tid, the task ID Pid, and the hash value Hv1. Is transmitted to the server 3 (step S22). After that, the student terminal 2 waits for the reception result Rr to be transmitted from the server 3 to the transmission result confirmation unit 26.

When the transmission result confirmation unit 26 receives the reception result Rr transmitted from the server 3 (step S23), the transmission result confirmation unit 26 confirms the reception result Rr (step S24). If the reception result Rr is not an error, the hash value Hv2 and the date and time information Dt are received, and the input hash value Hv1 and the hash value Hv2 are compared (step S25). When the hash values Hv1 and Hv2 are the same, the value corresponding to the reception result Rr is set in the progress ID Aid (step S26). When the hash values Hv1 and Hv2 are different values, 4 (submission error) is set in the progress ID Aid (step S27). Then, the teacher ID Tid, the task ID Pid, the date and time information Dt, and the progress ID Aid are stored in the progress table in the progress table storage unit 27 (step S28). If the reception result Rr is an error, a message indicating that is displayed (step S29).

An operation example in the report submission process will be described. FIG. 8 is a flowchart showing an operation example thereof.

The transmission unit 25 inputs the report data Rd, the teacher ID Tid, and the task ID Pid, reads out the access token At stored in the identification information storage unit 22, and reads the access token At, the teacher ID Tid, the task ID Pid, and the report data Rd. Is transmitted to the server 3 (step S30). After that, the student terminal 2 waits for the comparison result Cr to be transmitted from the server 3 to the transmission result confirmation unit 26.

When the transmission result confirmation unit 26 receives the comparison result Cr transmitted from the server 3 (step S31), the transmission result confirmation unit 26 confirms the comparison result Cr (step S32). If the comparison result Cr is not an error, a value corresponding to the comparison result Cr is set in the progress ID Aid (step S33). Then, the progress ID Aid corresponding to the input teacher ID Tid and task ID Pid is updated with respect to the progress table in the progress table storage unit 27 (step S34). If the comparison result Cr is an error, a message indicating that is displayed (step S35).

An operation example of the report progress display will be described. FIG. 9 is a flowchart showing an operation example thereof.

After inputting the progress request signal Rqa (step S40), the progress information acquisition unit 28 reads out all the teacher ID Tids, the assignment ID Pid, the date and time information Dt, and the progress ID Aid from the progress table in the progress table storage unit 27 (step S40). S41). Then, the teacher ID Tid, the task ID Pid, and the progress ID Aid are converted into the teacher name, the task name, and the progress status, respectively (step S42), and the teacher name, the task name, the date and time information, and the progress status are displayed (step S43). ..

The transmission units 24 and 25 may be combined into one transmission unit, and the transmission unit may execute the processing by the transmission units 24 and 25. Further, the progress information acquisition unit 28 may input a teacher ID or a teacher name and display only the progress status of the report for the task assigned by the teacher.

The details of the server 3 will be described.

FIG. 10 is a block diagram showing a configuration example of the server 3. The server 3 includes a storage unit 31, an authentication unit 32, a reception processing unit 33 (first reception processing unit) and 34 (second reception processing unit), and request processing units 35 and 36. The authentication unit 31 is involved in authentication processing, the reception processing unit 33 is involved in provisional submission processing, the reception processing unit 34 and request processing unit 35 are involved in report submission processing, and the request processing unit 36 is involved in management information acquisition processing.

The storage unit 32 stores a management table and report data for managing the progress of the report submitted by each student. The information stored in the management table is the management information.

FIG. 11 is an image diagram showing an example of a management table. Student IDs, passwords, and access tokens for each student are stored in the management table in association with each other, and further, teacher IDs, assignment IDs, submission deadlines, hash values, date and time information, status IDs, and storage information are supported for each student. It is stored with. The status ID assigned according to the report submission status takes a value of 0 to 2. The state ID = 0 indicates the status of "not submitted" in which the hash value has not been received, and the status ID = 1 indicates the status of "waiting for data transmission" in which the hash value has been received but the report data has not been received. , Status ID = 2 indicates the status of “data transmitted” for which the report data has been received.

The student ID and password are stored in the management table by the student ID and password registration work at the initial stage of using the data transmission / reception system 1 or when a new student who is assigned an assignment is added. In addition, every time a new assignment occurs, the teacher ID, assignment ID, and submission deadline of the faculty member in charge of the assignment are stored in the management table. 0 (not submitted) is set as the initial value for the state ID. In FIG. 11, items other than the state ID whose values are the initial values are left blank.

In the authentication process, the authentication unit 32 receives the student ID Sid and password Pw transmitted from the identification information acquisition unit 21 of the student terminal 2. Then, it is confirmed whether the received student ID Sid and password Pw exist in the management table in the storage unit 31. When existing in the management table, the authentication unit 31 sets the authentication result Ar to "OK", generates an access token Ar, and sends the authentication result Ar and the access token Ar to the student ID Sid and the password Pw. Send to. In addition, the generated access token At is stored in the management table as an access token for the received student ID. If it does not exist in the management table, the authentication unit 32 sets the authentication result Ar to "NG" and transmits it to the student terminal 2.

In the provisional submission process, the reception processing unit 33 receives the access token At, the teacher ID Tid, the assignment ID Pid, and the hash value Hv1 transmitted from the transmission unit 24 of the student terminal 2, and sets the date and time when they are received as date and time information. Let Dt be, and let the hash value Hv1 be the hash value Hv2. Then, the hash value Hv2 and the date and time information Dt are stored in the management table in the storage unit 31 as the hash value and the date and time information corresponding to the received access token At, the teacher ID Tid, and the task ID Pid. Further, the student ID corresponding to the access token At is specified from the management table, and the specified student ID Side and assignment ID Pid are transmitted to the teacher terminal 4 corresponding to the teacher ID Tid together with the provisional submission notification Tn. Furthermore, the submission deadline corresponding to the access token At, teacher ID Tid, and assignment ID Pid is read from the management table and compared with the date and time information Dt. If the date and time information Dt is within the submission deadline, the reception result Rr is set to "within the deadline". , If the submission deadline has passed, the reception result Rr is set to "out of deadline". The reception processing unit 33 transmits the reception result Rr, the hash value Hv2, and the date and time information Dt to the student terminal 2 corresponding to the received access token At. Further, the state ID corresponding to the access token At, the teacher ID Tid, and the task ID Pid in the management table is changed to 1 (waiting for data transmission). If the received access token At, teacher ID Tid, and assignment ID Pid do not exist in the management table, it is considered that the data transmitted from the student terminal 2 is not appropriate, and the reception result Rr is set as an error, and the student Send to the terminal 2.

In the report submission process, the reception processing unit 34 receives the access token At, the teacher ID Tid, the assignment ID Pid, and the report data Rd transmitted from the transmission unit 25 of the student terminal 2, and receives the access token At, the teacher ID Tid, and the report data Rd. The hash value Hv2 corresponding to the task ID Pid is read from the management table in the storage unit 31. Further, the same SHA-256 used by the data-specific value generation unit 23 in the student terminal 2 is used to generate a hash value Hv3 for the report data Rd and compare it with the hash value Hv2. If the hash values Hv2 and Hv3 match, the comparison result Cr is set as "match", and if they do not match, the comparison result Cr is set as "mismatch" and transmitted to the student terminal 2 corresponding to the received access token At. When the hash values Hv2 and Hv3 match, the report data Rd is stored in the storage unit 31, the stored location is set as the storage information Li, and the storage information corresponding to the access token At, the teacher ID Tid, and the task ID Pid is used. , Store information Li is stored in the management table. Further, the report submission notification Rn is transmitted to the teacher terminal 4 corresponding to the teacher ID Tid together with the student ID and the assignment ID corresponding to the access token At, and the access token At, the teacher ID Tid and the assignment ID Pid in the management table are transmitted. Change the status ID corresponding to 2 (data transmitted). If the received access token At, teacher ID Tid, and assignment ID Pid do not exist in the management table, it is considered that the data transmitted from the student terminal 2 is not appropriate, and the comparison result Cr is set as an error, and the student Send to the terminal 2.

In the report submission process, the request processing unit 35 reads the stored information Li corresponding to the student ID Sid, the teacher ID Tid, and the assignment ID Pid transmitted from the teacher terminal 4 from the management table, and reports data based on the stored information Li. Rd is read from the storage unit 31. Then, the read report data Rd is transmitted to the teacher terminal 4 corresponding to the teacher ID Tid. If the stored information Li corresponding to the student ID Sid, the teacher ID Tid, and the assignment ID Pid is not in the management table (the initial value remains), the report data Rd is not stored in the storage unit 31, and the report data Rd Instead, the error is transmitted to the teacher terminal 4 corresponding to the teacher ID Tid.

In the management information acquisition process, the request processing unit 36 has the student ID Side, the assignment ID Pid, the date and time information Dt, and the status ID among the management information in which the teacher ID Tid transmitted from the teacher terminal 4 is stored as the teacher ID. Cid is read from the management table in the storage unit 31, and they are transmitted to the teacher terminal 4 corresponding to the teacher ID Tid.

In such a configuration of the server 3, an operation example of the server 3 in each process will be described with reference to the flowcharts of FIGS. 12 to 16.

First, an operation example in the authentication process will be described. FIG. 12 is a flowchart showing an operation example thereof.

The authentication unit 32 receives the student ID Sid and password Pw transmitted from the student terminal 2 (step S50), and confirms whether they exist in the management table (step S51). If it exists in the management table, the authentication result Ar is set to "OK" (step S52), and the access token Ar is generated (step S53). Then, the authentication result Ar and the access token Ar are transmitted to the student terminal 2 (step S54), and the access token Ar is stored in the management table (step S55). If it does not exist in the management table, the authentication result Ar is set to "NG" (step S56) and transmitted to the student terminal 2 (step S57).

Next, an operation example in the provisional submission process will be described. FIG. 13 is a flowchart showing an operation example thereof. As described above, 0 (not submitted) is set as the initial value for the state ID in the management table.

The reception processing unit 33 receives the access token At, the teacher ID Tid, the assignment ID Pid, and the hash value Hv1 transmitted from the student terminal 2 (step S60), and sets the date and time when they are received as the date and time information Dt, and the hash value. Let Hv1 be the hash value Hv2. When the received access token At, the teacher ID Tid, and the task ID Pid are present in the management table (step S61), the hash value Hv2 and the date / time information Dt are stored in the management table (step S62). Then, the student ID Sid and the assignment ID Pid corresponding to the access token At are transmitted to the teacher terminal 4 corresponding to the teacher ID Tid together with the provisional submission notification Tn (step S63). Further, the submission deadline corresponding to the access token At, the teacher ID Tid, and the assignment ID Pid is read from the management table (step S64), and it is confirmed whether or not the date and time information Dt is within the submission deadline (step S65). If the date and time information Dt is within the submission deadline, the reception result Rr is set to "within the deadline" (step S66), and if the submission deadline has passed, the reception result Rr is set to "out of the deadline" (step S67). Then, the reception result Rr, the hash value Hv2, and the date and time information Dt are transmitted to the student terminal 2 (step S68). Further, the status ID in the management table is changed to 1 (waiting for data transmission) (step S69). When the received access token At, the teacher ID Tid, and the task ID Pid do not exist in the management table (step S61), the reception result Rr is set as an error and transmitted to the student terminal 2 (step S70).

An operation example in the report submission process will be described. 14 and 15 are flowcharts showing an operation example thereof. Of the report submission processes, FIG. 14 shows an operation example when the report data is transmitted from the student terminal 2 to the server 3, and FIG. 15 shows an operation example when the report data is transmitted from the server 3 to the teacher terminal 4. ..

In the operation example shown in FIG. 14, the reception processing unit 34 receives the access token At, the teacher ID Tid, the task ID Pid, and the report data Rd transmitted from the student terminal 2 (step S71). When the received access token At, the teacher ID Tid, and the task ID Pid are present in the management table (step S72), the hash value Hv2 is read from the management table (step S73). Then, the hash value Hv3 for the report data Rd is generated by SHA-256 (step S74) and compared with the hash value Hv2 (step S75). When the hash values Hv2 and Hv3 match, the comparison result Cr is set to "match" (step S76). Then, the report data Rd is stored in the storage unit 31 (step S77), and the stored information Li is stored in the management table (step S78). Further, the report submission notification Rn, the student ID corresponding to the access token At, and the assignment ID are transmitted to the teacher terminal 4 corresponding to the teacher ID Tid (step S79). Further, the status ID in the management table is changed to 2 (data has been transmitted) (step S80). When the hash values Hv2 and Hv3 do not match, the comparison result Cr is set as "mismatch" (step S81). When the received access token At, the teacher ID Tid, and the task ID Pid do not exist in the management table (step S72), the comparison result Cr is set as an error (step S82). The comparison result Cr is transmitted to the student terminal 2 (step S83).

In the operation example shown in FIG. 15, the request processing unit 35 receives the student ID Sid, the teacher ID Tid, and the assignment ID Pid transmitted from the teacher terminal 4 (step S84), and stores the stored information Li corresponding to them. Read from the management table (step S85). When the stored information Li exists in the management table (step S86), the report data Rd is read from the storage unit 31 based on the stored information Li (step S87), and is transmitted to the teacher terminal 4 corresponding to the teacher ID Tid (step S87). S88). When the stored information Li does not exist in the management table (the initial value remains) (step S86), an error is transmitted to the teacher terminal 4 corresponding to the teacher ID Tid (step S89).

An operation example in the management information acquisition process will be described. FIG. 16 is a flowchart showing an operation example thereof.

The request processing unit 36 receives the teacher ID Tid transmitted from the teacher terminal 4 (step S90), and inputs the student ID Sid, the assignment ID Pid, the date and time information Dt, and the status ID Cid corresponding to the teacher ID Tid from the management table. Read (step S91) and transmit to the teacher terminal 4 (step S92).

The reception processing units 33 and 34 may be combined into one reception processing unit, and the reception processing units 33 and 34 may execute the processing in the reception processing unit. The request processing units 35 and 36 may also be combined into one request processing unit, and the request processing units may execute the processing by the request processing units 35 and 36.

The details of the teacher terminal 4 will be described.

FIG. 17 is a block diagram showing a configuration example of the teacher terminal 4. The teacher terminal 4 includes an event detection unit 41, a report data acquisition unit 42, and a management information acquisition unit 43. The event detection unit 41 is related to the provisional submission process and the report submission process, the report data acquisition unit 42 is related to the report submission process, and the management information acquisition unit 43 is related to the management information acquisition process. As described above, the teacher ID is stored in advance in the teacher terminal 4.

When the event detection unit 41 receives the provisional submission notification Tn transmitted from the reception processing unit 33 of the server 3 in the provisional submission processing, the event detection unit 41 corresponds to the student ID Sid based on the student ID Sid and the assignment ID Pid transmitted at the same time. The display function of the faculty terminal 4 is to display a message indicating that the hash value of the report data corresponding to the assignment ID Pid has been sent from the student (such as "Student L has temporarily submitted the report of assignment A"). To display using.

Further, in the report submission process, when the event detection unit 41 receives the report submission notification Rn transmitted from the reception processing unit 34 of the server 3, the student ID Sid is based on the student ID Sid and the assignment ID Pid transmitted at the same time. Use the display function of the faculty terminal 4 to display a message (such as "Student L submitted the report of assignment A") indicating that the report data corresponding to the assignment ID Pid was sent from the student corresponding to And display.

The report data acquisition unit 42 acquires the report data Rd stored in the server 3 in the report submission process. The teacher inputs the student ID and the assignment ID for the report data to be acquired by the input function (keyboard, touch panel, etc.) of the teacher terminal 4. The report data acquisition unit 42 transmits the input student ID Sid and assignment ID Pid to the server 3 together with the teacher ID Tid stored in advance. Then, the report data Rd transmitted from the request processing unit 35 of the server 3 is received. If an error is sent instead of the report data Rd, a message to that effect (such as "report data does not exist") is displayed using the display function of the teacher terminal 4.

The management information acquisition unit 43 acquires necessary information from the management information held by the server 3 in the management information acquisition process, and displays the submission status of the report for the task assigned by the teacher. The input function of the teacher terminal 4 inputs a signal (hereinafter referred to as “status request signal”) Rqb requesting display of the report submission status to the management information acquisition unit 43. For example, a button for displaying the report submission status is displayed on the screen, and the status request signal Rqb is generated by clicking or touching the button. The management information acquisition unit 43 that has input the status request signal Rqb transmits the teacher ID Tid to the server 3. Then, based on the student ID Sid, the assignment ID Pid, the date and time information Dt, and the status ID Cid transmitted from the request processing unit 36 of the server 3, the student name corresponding to the student ID, the assignment name corresponding to the assignment ID, and the date and time information And, as shown in FIG. 18, for example, the report submission status corresponding to the status ID is displayed by the display function of the teacher terminal 4. In FIG. 18, the assignment name is displayed in the “assignment” column, the student name is displayed in the “submission source” column, the date and time information is displayed in the “submission date and time” column, and the report submission status is displayed in the “submission status” column. Regarding the correspondence between the student ID and the student name, the correspondence between the assignment ID and the assignment name, and the correspondence between the status ID and the report submission status, the correspondence between them is registered in advance in the faculty terminal 4, and when displayed. Use that correspondence. The received management information may be displayed as it is without being converted into the student name, the assignment name, and the report submission status.

In such a configuration of the teacher terminal 4, an operation example of the teacher terminal 4 in each process will be described with reference to the flowcharts of FIGS. 19 to 22.

First, an operation example in the provisional submission process will be described. FIG. 19 is a flowchart showing an operation example thereof.

The event detection unit 41 receives the provisional submission notification Tn, the student ID Sid, and the assignment ID Pid transmitted from the server 3 (step S100). Then, a message is displayed based on the student ID Sid and the assignment ID Pid (step S101).

An operation example in the report submission process will be described. 20 and 21 are flowcharts showing an operation example thereof. Of the report submission processes, FIG. 20 shows an operation example when the report data is transmitted to the server 3, and FIG. 21 shows an operation example when the report data is transmitted from the server 3 to the teacher terminal 4.

In the operation example shown in FIG. 20, the event detection unit 41 receives the report submission notification Rn, the student ID Sid, and the assignment ID Pid transmitted from the server 3 (step S110). Then, a message is displayed based on the student ID Sid and the assignment ID Pid (step S111).

In the operation example shown in FIG. 21, the report data acquisition unit 42 inputs the student ID Sid and the assignment ID Pid input to the teacher terminal 4 (step S112), and transmits them to the server 3 together with the teacher ID Tid (step S112). S113). After that, it waits for the report data Rd to be transmitted from the server 3. After receiving the report data Rd from the server 3 (step S114), the report data Rd is confirmed (step S115). If the report data Rd is not an error, the report data Rd is stored (step S116). If the report data Rd is an error, a message to that effect is displayed (step S117).

An operation example in the management information acquisition process will be described. FIG. 22 is a flowchart showing an operation example thereof.

After inputting the status request signal Rqb (step S120), the management information acquisition unit 43 transmits the teacher ID Tid to the server 3 (step S121). After that, it waits for the student ID Sid, the assignment ID Pid, the date and time information Dt, and the status ID Cid to be transmitted from the server 3. Upon receiving them (step S122), the student ID Tid, the assignment ID Pid, and the status ID Cid are converted into the student name, the assignment name, and the report submission status (step S123), respectively, and the student name, the assignment name, the date and time information, and the report. The submission status is displayed (step S124).

The management information acquisition unit 43 may display not only the report submission status corresponding to the teacher ID Tid but also the report submission status for all the teachers stored in the management table held by the server 3. Further, a student ID or student name or an assignment ID or assignment name may be input to display the report submission status for each student or assignment.

The following modifications can be made to the above-described embodiment.

In the above-described embodiment, the server 3 and the teacher terminal 4 are separated, but the server 3 and the teacher terminal 4 are combined into one, for example, the function of the teacher terminal 4 is mounted on the server 3, and the teacher , The submitted report or the like may be confirmed on the server 3. As a result, it is not necessary to send and receive data between the server 3 and the teacher terminal 4, and the system can be made compact.

Further, although the student authentication is performed by the server 3, a device or system (hereinafter referred to as “authentication system”) for performing authentication may be separately prepared. For example, when the authentication system 6 is prepared, the operation procedure in the authentication process and the provisional submission process is as shown in the sequence diagram shown in FIG. 23. That is, in the authentication process, the student terminal 2 transmits the student ID and password to the authentication system 6 (step S1A). The authentication system 6 uses the student ID and password information stored in advance to perform authentication based on the received student ID and password. If it is authenticated as an official user, an access token is generated and sent to the student terminal 2 together with the authentication result. If it is not authenticated as an official user, an error is sent as an authentication result to the student terminal 2. Send to. In the provisional submission process, the student terminal 2 transmits the student ID to the server 3 in addition to the access token, the teacher ID, the assignment ID, and the hash value (step S2A). The server 3 transmits the received access token to the authentication system 6 (step S2B). The authentication system 6 determines whether the received access token is appropriate, and transmits the determination result to the server 3. Based on the determination result from the authentication system 6, the server 3 uses the student ID instead of the access token to perform the subsequent processing. In the report submission process as well, the authentication system 6 confirms the access token transmitted from the student terminal 2 and performs the subsequent processes, as in the provisional submission process. This eliminates the need for the server 3 to perform the authentication process, and the authentication process can be shared by other systems and services.

In the above-described embodiment, the access token is used in transmitting the hash value and the report data from the student terminal 2 to the server 3, but fraudulent acts such as spoofing of the student ID are prevented by other means. In some cases, the student ID may be used. Other than the student ID, any information that can identify the student may be used.

Further, although the teacher ID is used in the request for acquisition of the report data and the management information from the teacher terminal 4 to the server 3, an access token may be used instead of the teacher ID. This makes it possible to prevent unauthorized access to the server 3.

In the above-described embodiment, the date and time when the server 3 receives the hash value transmitted from the student terminal 2 is used as the date and time information, but the date and time when the student terminal 2 transmits the hash value is also used. good. In this case, the student terminal 2 transmits the date and time information to the server 3 in addition to the access token, the teacher ID, the assignment ID, and the hash value, and the transmission of the date and time information from the server 3 to the student terminal 2 is performed. It becomes unnecessary.

Further, although the student terminal 2 has a progress table for managing the progress of the report to be submitted, the server 3 may have the progress table. That is, the server 3 holds a progress table for each student, and each student accesses the server 3 from the student terminal 2 and acquires the information of the progress table held by the server 3 when checking the progress status of the report. do. As a result, the student terminal 2 can reduce the processing and storage capacity for managing the progress table. Further, the management table owned by the server 3 and the progress table may be fused and managed as one table. As a result, the information can be managed collectively, and efficient management can be achieved.

In the above-described embodiment, the transmission of the report data from the student terminal 2 to the server 3 is performed based on the student's judgment such as inputting the task ID to the student terminal 2, but the student terminal 2 May monitor the congestion status of the network and automatically send the report data when it is determined that high-speed communication is possible. This saves the student the trouble of determining when to send the report data.

Also, regarding report data transmission, if the report data transmission deadline is set, the server 3 will send a warning or the like to the student terminal 2 that has not sent the report data when the transmission deadline is approaching. May be. Regarding the submission deadline, such a warning or the like may be sent. That is, a warning or the like is transmitted from the server 3 to the student terminal 2 that has not transmitted the hash value even when the submission deadline is approaching. This makes it possible to prevent students from forgetting to send.

Although the above-described embodiment is intended for managing the deadline of the report for the subject, the present invention can be applied not only to the report but also to the data for which the submission deadline is set.

In the above-described embodiment, the identification information storage unit 22, the progress table storage unit 27, and the storage unit 31 are used as memories, and the processing of other components is realized as a program as described above to configure the computer and the memory. It is feasible with. Each component can be realized by hardware such as a dedicated IC (Integrated Circuit) or FPGA (Field Programmable Gate Array). Further, although the above-described embodiment is described in the form of a system or an apparatus, the present invention can also take the form of a method or a program.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

1 Data transmission / reception system 2 Student terminal 3 Server 4 Teacher terminal 5 Network 6 Authentication system 21 Identification information acquisition unit 22 Identification information storage unit 23 Data specific value generation unit 24, 25 Transmission unit 26 Transmission result confirmation unit 27 Progress table storage unit 28 Progress information acquisition unit 31 Storage unit 32 Authentication unit 33, 34 Reception processing unit 35, 36 Request processing unit 41 Event detection unit 42 Report data acquisition unit 43 Management information acquisition unit

Claims (14)

A data transmission / reception system including a data transmission device for transmitting data for which a submission deadline is set via a network and a data reception device for receiving the data.
The data transmission device
An identification information unit that holds identification information for identifying the data,
Based on the data, a data-specific value generator that generates a data-specific value that is a value unique to the data and sets it as the first data-specific value, and a data-specific value generator.
A first transmission unit that uses the identification information as the first identification information and transmits the first data-specific value together with the first identification information.
The identification information is used as the second identification information, and a second transmission unit for transmitting the data together with the second identification information is provided.
After the transmission of the value peculiar to the first data, the data is transmitted, and the data is transmitted.
The data receiving device
A first reception processing unit that receives the first data-specific value and the first identification information and acquires date and time information related to transmission / reception of the first data-specific value.
A storage unit that stores the first identification information, the value peculiar to the first data, and the date and time information in association with each other.
Of the first identification information stored in the storage unit, the data and the second identification information are received, the data-specific value is generated based on the received data to obtain the second data-specific value, and the data is stored in the storage unit. , The first data-specific value corresponding to the first identification information, which is the same value as the second identification information, and the second data-specific value are compared, and the first data-specific value and the second data-specific value are compared. A data transmission / reception system comprising a second reception processing unit that recognizes the corresponding date / time information as the submission date / time when the data matches. The data transmission / reception system according to claim 1, wherein the data-specific value is a value generated in a small capacity even when the data has a large capacity. The data transmission / reception system according to claim 2, wherein the data-specific value is a hash value. The data transmission / reception system according to any one of claims 1 to 3, wherein the date and time information is the date and time when the first reception processing unit receives the value peculiar to the first data. The data receiving device transmits the result of comparison between the first data peculiar value and the second data peculiar value in the second receiving processing unit to the data transmitting device that transmitted the first data peculiar value. The data transmission / reception system according to any one of claims 1 to 4. The invention according to any one of claims 1 to 5, wherein the data receiving device returns the first data peculiar value received by the first receiving processing unit to the data transmitting device that has transmitted the first data peculiar value. Data transmission / reception system. The data transmission / reception system according to any one of claims 1 to 6, wherein the first reception processing unit determines whether or not the date and time information has passed the submission deadline. A data transmission / reception method executed in a data transmission / reception system including a data transmission device for transmitting data for which a submission deadline is set via a network and a data reception device for receiving the data.
The data transmission device
A retention step that retains identification information for identifying the data,
Based on the data, a data-specific value generation step of generating a data-specific value which is a value peculiar to the data and making it a first data-specific value, and a data-specific value generation step.
A first transmission step in which the identification information is used as the first identification information and the value peculiar to the first data is transmitted together with the first identification information.
After the first transmission step, the identification information is used as the second identification information, and the second transmission step of transmitting the data together with the second identification information is executed.
The data receiving device
A first reception processing step of receiving the first data peculiar value and the first identification information and acquiring date and time information related to transmission / reception of the first data peculiar value.
A storage step of storing the first data peculiar value and the date and time information in the storage unit in association with the first identification information.
Of the first identification information stored in the storage unit, the data and the second identification information are received, the data-specific value is generated based on the received data to obtain the second data-specific value, and the data is stored in the storage unit. , The first data-specific value corresponding to the first identification information, which is the same value as the second identification information, and the second data-specific value are compared, and the first data-specific value and the second data-specific value are compared. A data transmission / reception method comprising executing a second reception processing step of certifying the corresponding date / time information as a submission date / time when the data matches. A data receiving device that receives data for which a submission deadline has been set via a network.
The first data-specific value, which is a value peculiar to the data and is a data-specific value generated based on the data, is received together with the first identification information which is the identification information for identifying the data, and the first is described. The first reception processing unit that acquires date and time information related to the transmission and reception of data-specific values,
A storage unit that stores the first identification information, the value peculiar to the first data, and the date and time information in association with each other.
The data transmitted after the transmission of the first data peculiar value is received together with the second identification information which is the identification information, and the data peculiar value is generated based on the received data to be peculiar to the second data. Of the first identification information stored in the storage unit, the first data-specific value and the second data-specific value corresponding to the first identification information, which are the same values as the second identification information. When the first data peculiar value and the second data peculiar value match, the data receiving device is provided with a second receiving processing unit that recognizes the corresponding date and time information as the submission date and time. .. The data receiving device according to claim 9, wherein the data-specific value is a value generated in a small capacity even when the data has a large capacity. The data receiving device according to claim 10, wherein the data-specific value is a hash value. The data receiving device according to any one of claims 9 to 11, wherein the date and time information is the date and time when the first receiving processing unit receives the first data specific value. It is a data reception method that receives data for which a submission deadline is set via a network.
The first data-specific value, which is a value peculiar to the data and is a data-specific value generated based on the data, is received together with the first identification information which is the identification information for identifying the data, and the first is described. The first reception step to acquire the date and time information related to the transmission and reception of data-specific values, and
A storage step of storing the first data peculiar value and the date and time information in the storage unit in association with the first identification information.
The data transmitted after the transmission of the first data peculiar value is received together with the second identification information which is the identification information, and the data peculiar value is generated based on the received data to be peculiar to the second data. Of the first identification information stored in the storage unit, the first data-specific value and the second data-specific value corresponding to the first identification information, which are the same values as the second identification information. The data receiving method is characterized by having a second reception processing step for certifying the corresponding date and time information as the submission date and time when the first data peculiar value and the second data peculiar value match. .. A data receiving program for causing a computer to execute the data receiving method according to claim 13.

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