JP4977060B2 - Trail management system, transmission device, and reception device - Google Patents

Description

  The present invention relates to a trail management system that performs trail management of communication messages, a transmission device that transmits the communication messages, and a reception device that receives the communication messages.

  In recent years, it has been desired to enable post-verification (that is, auditing) that processes on an information processing system have been executed reliably and without fraud. For example, in an information processing system that executes business processes related to accounting, it is common to audit whether proper accounting processing is being executed based on report information output by the information processing system. A technique for generating and managing such report information is called a trail management technique. The report information is output in a general access history format or a format that complies with applicable laws. In the case of an information processing system that operates data, it is common to output an access history for data, a snapshot along the time axis of data, or the like.

  Further, when receiving data from another system in a communication message format as in a distributed system, it is conceivable to store the communication message itself as a history. Also in this case, the transmitted / received communication message is often stored as a snapshot. This is important from the viewpoint of non-repudiation related to transmission / reception of communication messages. In general, a method of applying a digital signature to a communication message and saving a snapshot of the communication message is known. Thereby, the denial of a series of communication messages can be prevented.

In addition, a technique for reducing the used capacity of a storage device on the information processing apparatus side that receives data has been proposed (for example, Patent Document 1).
JP 2007-004453 A

  In the prior art, the communication message itself is stored in order to apply an electronic signature or the like to the communication message itself. However, this may lead to an increase in the amount of stored data in trail management. Particularly in recent years, since the amount of information of communication messages themselves has been increasing, it is desirable to take a data storage means for more efficient trail management. Therefore, even if the communication message is stored as data in a compressed format such as a hash value, it is difficult to perform post-verification of the content of the communication message.

  For this reason, it is possible to consistently guarantee from generation and transmission of communication messages to storage of data for trail management (can prevent non-repudiation for transmission of communication contents), and the amount of stored data for trail management It is hoped to reduce this.

  The present invention has been made in view of the above circumstances, and provides a trail management system, a transmission device, and a reception device capable of reliably performing trail management while reducing the amount of stored data necessary for trail management. The purpose is to provide.

  The trail management system according to the present invention is a trail management system including a transmission device that transmits a communication message and a reception device that receives the communication message, and the transmission device transmits the content of the communication message to be transmitted to the reception device. A trail content of the communication message content is generated by converting to a certain description format, a hash value is generated from the generated trail content using a hash algorithm, and the generated hash value and a digital signature algorithm are used. Security processing is performed on an information group including at least first identification information for specifying the description format, second identification information for specifying the hash algorithm, and third identification information for specifying the electronic signature algorithm. And the electronic signature value obtained by the above and the first to third identification information First trail data generating means for generating trace message data, generating trail data including the generated trail content and the generated trail message data, and trail data generated by the first trail data generating means Communication data generating means for generating a communication message including the first trail data storing means for storing the message in the first recording medium, and the contents of the communication message and the trail message data generated by the first trail data generating means And a first communication means for transmitting the communication message generated by the communication message generating means to the receiving device, wherein the receiving device receives a communication message transmitted from the transmitting device. Analyzing the communication message received by the communication means and the second communication means, Communication message analysis means for extracting communication message contents and the trail message data, and communication message contents extracted by the communication message analysis means are included in the trail message data extracted by the communication message analysis means. By converting to the description format specified by the identification information of one, the trail content of the communication message content is generated, and the generated trail content is specified by the second identification information included in the trail message data. A hash value is generated using the hash algorithm, and the electronic value included in the trail message data is generated using the generated hash value and the electronic signature algorithm specified by the third identification information included in the trail message data. To check if the signature value is correct Moreover, trail message data verifying means for verifying whether or not the trail message data has been tampered with, and when the trail message data verifying means has verified that the message has not been tampered with, Second trail data generating means for generating trail data including the extracted trail message data, and a second trail for storing the trail data generated by the second trail data generating means in a second recording medium And a data storage means.

  The transmitting device according to the present invention is a transmitting device that transmits a communication message to a receiving device, and converts the content of the communication message to be transmitted to the receiving device into a description format, thereby converting the trail content of the communication message content. Generating a hash value using a hash algorithm from the generated trail content, and using the generated hash value and a digital signature algorithm, at least first identification information for specifying the description format, An electronic signature value obtained by applying security processing to an information group including second identification information specifying a hash algorithm and third identification information specifying the electronic signature algorithm; and the first to third identifications Generating trail message data including information, and generating the generated trail content and the generated trail message. Trail data generation means for generating trail data including sage data, trail data storage means for storing the trail data generated by the trail data generation means in a recording medium, the communication message content and the trail data generation means A communication message generating means for generating a communication message including the generated trail message data; and a first communication means for transmitting the communication message generated by the communication message generating means to the receiving device. And

  The receiving device according to the present invention is a receiving device that receives a communication message transmitted from a transmitting device, the communication device receiving a communication message transmitted from the transmitting device, and the communication device receiving the communication message. A communication message analysis unit that analyzes a communication message and extracts communication message content and trail message data from the communication message, and a communication message content extracted by the communication message analysis unit is extracted by the communication message analysis unit. By converting to the description format specified by the first identification information included in the trail message data, a trail content of the communication message content is generated, and from the generated trail content, a second content included in the trail message data is generated. Using the hash algorithm specified by the identification information of 2. Whether or not the electronic signature value included in the trail message data is correct by generating a hash value and using the generated hash value and the electronic signature algorithm specified by the third identification information included in the trail message data And verifying whether or not the trail message data has been tampered with, and verifying that the message has not been tampered with by the trail message data verifying means. Second trail data generating means for generating trail data including the trail contents and the extracted trail message data, and the trail data generated by the second trail data generating means is stored in the second recording medium. And a second trail data storage unit.

  According to the present invention, it is possible to reliably perform trail management while reducing the amount of stored data necessary for trail management.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
First, a first embodiment of the present invention will be described.
FIG. 1 is a diagram showing an example of a schematic configuration of a trail management system according to the first embodiment of the present invention.

  This trail management system includes a transmission device 1 and a reception device 2 connected via a network N. Although not shown in FIG. 1, the transmission device 1 can communicate with a transmission-side application connected to the transmission device 1, and the reception device 2 is connected to the reception device 2. Communication with the receiving application is possible. The connection form between the transmission apparatus 1 and the transmission side application may be any form as long as communication between the two is possible. For example, the transmission side application may be deployed on the same physical device as the transmission device 1 or may be deployed on a different physical device. Similarly, the connection form between the receiving device 2 and the receiving application may be any form as long as communication between the two is possible. For example, the receiving-side application may be deployed on the same physical device as the receiving device 2 or may be deployed on a different physical device.

  The transmission device 1 generates trail contents indicating the trail from the communication message contents passed from the transmission side application, and stores the generated trail contents and trail data including the trail message data obtained from the trail contents in a recording medium. And an information processing device (computer) capable of transmitting a communication message including the content of the communication message and the trail message data to the receiving device 2. The content of the communication message is data transmitted and received between the transmission side application and the reception side application via the transmission device 1 and the reception device 2.

  The receiving device 2 receives a communication message transmitted from the transmitting device 1, generates a trail content indicating the trail from the communication message content included in the communication message, and obtains information obtained from the trail content, etc. And verifying whether or not the trail message data included in the communication message is falsified, and if there is no falsification, the trail data and the trail data including the trail message data are stored in a recording medium, and the communication message content is stored in the recording medium. It is an information processing apparatus (computer) that can be passed to a receiving application.

  FIG. 2 is a diagram illustrating an example of a functional configuration of the transmission device 1 illustrated in FIG.

  The transmission apparatus 1 includes a control unit 10, an input interface unit 11, a communication message content acquisition unit 12, a trail data generation unit 13, a security processing unit 14, a key management unit 15, a key storage unit 15A, a trail data storage unit 16, and a communication message. It has various functions such as a generation unit 17 and a communication unit 18.

  The control unit 10 is a function for controlling events and data in the transmission device 1. The control unit 10 executes commands for various functions and delivers data necessary for processing. It is also possible to omit the use of a certain function and make a direct call between other functions.

  The input interface unit 11 is a function for receiving data from the transmission-side application 1A that is a higher-level application. This data is data that the transmission side application desires to send to the reception side application, and specifically corresponds to the content of the communication message.

  The communication message content acquisition unit 12 is a function for acquiring communication message content from a higher-level application.

  The trail data generation unit 13 is a function for generating trail data including trail content and trail message data from the communication message content acquired by the communication message content acquisition unit 12. Further, the trail data generation unit 13 acquires from other functions additional information (information not included in the communication message content) necessary for generating the trail data other than the communication message content and generating the trail message data. For example, time information (preferably a time stamp) indicating trail data generation time, communication message destination information (Uniform Resource Identifier, Internet Protocol address, etc.), electronic signature key and key information related to the electronic signature key, etc. Can be mentioned. These pieces of information are field information (described later) depending on the description format of the trail data, and are defined in the trail data description format. Each piece of information is desirably acquired by an acquisition unit suitable for the information. For example, the time information is obtained from an external time stamp service.

  The security processing unit 14 is a function for generating a digital signature and encrypting data. In this embodiment, an example used to generate a digital signature will be described. It also includes a function for generating or acquiring time information such as a time stamp. The security processing unit 14 realizes a function corresponding to the security requirement required as the format of the trail data.

  The key management unit 15 is a function for managing information such as an encryption key used by the security processing unit 14. The key storage unit 15A is a database used by the key management unit 15 to store information such as an encryption key.

  The trail data storage unit 16 is a function or database that stores the trail data generated by the trail data generation unit 13.

  The communication message generation unit 17 has a function of generating a communication message from the communication message content input by the input interface unit 11 and the trail message data generated by the trail data generation unit 13.

  The communication unit 18 has a function of communicating with the receiving device 2 and transmitting the communication message generated by the communication message generating unit 17 to the receiving device 2. When performing entity authentication in communication with the receiving device 2, it is desirable to use this function. The communication protocol is not limited to a specific one, and any standard or the like may be used.

  FIG. 3 is a diagram illustrating an example of a functional configuration of the receiving device 2 illustrated in FIG.

  The receiving device 2 includes a control unit 20, a communication unit 21, a communication message analysis unit 22, a communication message content acquisition unit 23, a trail message data verification unit 24, a security processing unit 25, a key management unit 26, a key storage unit 26A, and trail data. It has various functions such as a generation unit 27, a trail data storage unit 28, and an output interface unit 29.

  The control unit 20 is a function for controlling events and data in the receiving device 2. The control unit 20 executes commands for various functions and delivers data necessary for processing. It is also possible to omit the use of a certain function and make a direct call between other functions.

  The communication unit 21 has a function of performing communication with the transmission device 1 and receiving a communication message transmitted from the transmission device 1. When performing entity authentication in communication with the transmission apparatus 1, it is desirable to use this function. The communication protocol is not limited to a specific one, and any standard or the like may be used.

  The communication message analysis unit 22 has a function of analyzing the structure of the communication message received by the communication unit 21 and extracting the content of the communication message, trail message data, and various types of information included in the communication message.

  The communication message content acquisition unit 23 is a function of acquiring the communication message content from the result analyzed by the communication message analysis unit 22.

  The trail message data verification unit 24 generates the trail content indicating the trail from the communication message content extracted by the communication message analysis unit 22 or the communication message content acquired by the communication message content acquisition unit 23, the trail content, etc. This is a function for verifying whether or not the trail message data included in the communication message has been tampered with using information obtained from the message.

  The security processing unit 25 has a function for generating a digital signature and encrypting data. In this embodiment, an example used to generate a digital signature will be described. It also includes a function for generating or acquiring time information such as a time stamp. The security processing unit 14 realizes a function corresponding to the security requirement required as the format of the trail data.

  The key management unit 26 is a function for managing information such as an encryption key used by the security processing unit 25. The key storage unit 26A is a database used by the key management unit 15 to store information such as an encryption key.

  The trail data generation unit 27 has a function of generating a communication message from the communication message content acquired by the communication message content acquisition unit 23 and the trail message data extracted by the communication message analysis unit 22.

  The trail data storage unit 28 is a function or database that stores the trail data generated by the trail data generation unit 27.

  The output interface unit 29 is a function for outputting data to the reception side application. This data is data that the transmission side application desires to be sent to the reception side application, and specifically corresponds to the content of the communication message.

  Next, various types of information used in the trail management system will be described with reference to FIGS.

  FIG. 4 is a diagram showing a data structure of the communication message 3 and the trail data 4. FIG. 5 is a diagram illustrating an example of a flow of information processed in the transmission device 1. FIG. 6 is a diagram illustrating an example of the flow of information processed in the reception device 2.

  As shown in FIG. 4, the communication message 3 includes a communication message content area R31 for storing communication message contents to be transmitted from the transmission device 1 to the reception device 2, and a trail message to be verified on the reception device 2 side. And a trail message data area R33 for storing data. However, the communication message is not stored in the trail message data area R33 or the trail message data area R33 does not exist until the communication message generation unit 17 on the transmission device 1 side generates the communication message.

  On the other hand, the trail data 4 includes a trail content area R41 for storing trail contents indicating contents to be saved as an actual trail, and a trail message data area for storing trail message data to be verified on the receiving device 2 side. R43. The trail data 4 is generated by the trail data generation unit 13 on the transmission device 1 side and stored in the trail data storage unit 16. The same data as the trail data 4 is also generated in the trail data generation unit 13 on the receiving device 2 side and stored in the trail data storage unit 28.

  The trail content in the trail content region R41 is information corresponding to the communication message content in the communication message content region R31, which is necessary when performing an audit or the like. Specifically, in the communication message content, information such as “From whom” “For what purpose” “What resources” “When” “To whom” “How” “What to do” This information can be confirmed automatically. Such information types are expected to differ in required information depending on the auditing subject in the application field. Further, not only communication messages between systems (or devices) but also information on applications running behind them (for example, which user's operation caused the communication message to be transmitted) is also required. It may be. Thus, the trail content can take a variety of forms. For this reason, it is desirable that the syntax that defines the information type and structure is already defined. In the present embodiment, it is assumed that identification information (a trail content description format name to be described later) that is uniquely distinguishable is assigned to the syntax. Also, in the present embodiment, an example will be described in which information that can be acquired from communication message content and information (such as destination information) related to transmission of the communication message is used as trail content.

  The trail message data 43 in the trail message data area R43 (or the trail message data 33 in the trail message data area R33) is information composed of the structure of the trail data and information related to protection and guarantee of the trail contents. In the example of FIG. 4, the trail data description format name indicating the structure of the trail data itself, the trail content description format name indicating the structure of the trail content, and the hash algorithm name indicating the hash algorithm used for irreversibly converting the trail content An electronic signature algorithm name indicating the used electronic signature algorithm, verification key information indicating information on a verification key for verifying the electronic signature, a time stamp value indicating the time when the trail data was generated, and the entire trail data An information group including an electronic signature value obtained by applying an electronic signature to the electronic signature is shown.

  The electronic signature value is used when the trail data is not falsified and when the sender of the communication message is prevented from being rejected. As for the electronic signature value, it is desirable to sign the entire trail data. However, the electronic signature value itself is not subject to signature. Specifically, the verification key information includes a key name and a serial number for identifying the verification key if the verification key is shared. In addition, if an external key management system or the like is used, this is destination information for acquiring a verification key described in a URI format or the like. Of course, the verification key itself may be included in the verification key information.

  On the transmitting device 1 side, as shown in FIG. 5, the trail data generating unit 13 converts the communication message content 31 to be transmitted to the receiving device 2 into a certain trail data description format (or trail content description format). A trail content 41 of the communication message content 31 is generated, a trail content hash value 42 is generated from the generated trail content 41 using a hash algorithm, and the generated trail content hash value 42 and a digital signature algorithm are used. The trail data description format name (or trail content description format name) that identifies the trail data description format (or trail content description format), the hash algorithm name that identifies the hash algorithm, and the electronic that identifies the electronic signature algorithm Security for information group including signature algorithm name It generates a digital signature value 33B obtained by the execution of the process. Next, the trail data generation unit 13 generates trail message data 43 including the electronic signature value 33B and the various names described above, and a trail including the generated trail content 41 and the generated trail message data 43. Data 4 is generated. However, the digital signature value generation process described above is merely an example, and is based on the digital signature algorithm employed. In generating the trail data 4, the security processing unit 14 and the key management unit 15 are used. The key for generating the signature and the verification key information are acquired from the key management unit 15.

  Next, the trail data storage unit 16 stores the trail data 4 generated by the trail data generation unit 13 in a recording medium, and the communication message generation unit 17 transmits the communication message 3 including the communication message content 31 and the trail message data 43. And the communication unit 18 transmits the communication message 3 to the receiving device 2.

  On the reception device 2 side, as shown in FIG. 6, the communication unit 21 receives the communication message 3 transmitted from the transmission device 1, and the communication message analysis unit 22 analyzes the communication message 3, and the communication Communication message content 31 and trail message data 33 are extracted from message 3. Further, the communication message acquisition unit 23 acquires the trail message data 33.

  Next, the trail message data verification unit 24 sets the communication message content 31 to the trail data description format (or trail content description format) specified by the trail data description format name (or trail content description format name) included in the trail message data 33. ) To generate a trail content 41 of the communication message content 31 and use the hash algorithm specified by the hash algorithm name included in the trail message data 33 from the generated trail content 41 to use the trail content hash. A value 42 is generated, and the electronic signature value 33B included in the trail message data 33 is correct using the generated trail content hash value 42 and the electronic signature algorithm specified by the electronic signature algorithm name included in the trail message data 33. Check whether or not It allows to verify whether the trail message data 33 has not been tampered. More specifically, based on the electronic signature algorithm name and the verification key information included in the trail message data 33, the electronic signature value included in the trail message data 33 is decrypted to obtain the trail content hash value '42'. . The trail content hash value '42' and the trail content hash value 42 are compared, and if the values are confirmed to be the same, it is determined that the electronic signature value 33B included in the trail message data 33 is correct. However, the above-described verification processing of the electronic signature value is an example, and it is assumed that the processing conforms to the employed electronic signature algorithm. In the digital signature process and the hash process, the security processing unit 25 and the key management unit 26 are used. For the verification key, the verification key is acquired from the key management unit 26 using the verification key information.

  If there is no falsification, the trail data generation unit 27 generates the trail data 4 including the trail contents 41 and the trail message data 33, and the trail data storage unit 28 stores the trail data 4 in the recording medium, and the output interface The unit 29 outputs the communication message content 31 acquired by the communication message acquisition unit 23 to the receiving-side application 2A.

  FIG. 5 is a diagram showing a modification of the data configuration shown in FIG.

  That is, in the trail message data, trail description extended description areas R43E and R33E may be provided as extension description areas for supplementing the trail contents as shown in FIG. This is an area for describing information that does not appear in the trail content and communication message content and that needs to be left as a trail. That is, there is information that should be notified to the receiving device 2 side in the process of generating the communication message content in the transmission side application, and information that does not appear in the communication message content and the trail content.

  Here, consider an example in which user account information is provisioned between a plurality of systems (or devices) in a distributed system environment. When a system A requests system B to create an account, information necessary for creating the account (user attribute information, rules for handling attribute information, etc.) is sent together with a message indicating the account creation. It is common. Such a message is composed of information necessary for the operation of creating an account. However, from the viewpoint of auditing, it is necessary to leave a trail including the circumstances that led to requesting account creation on the system A side.

  For example, in the approval flow of the account creation request on the system A side, who started the approval flow at what time and who approved at what time. More specifically, in such an account creation request approval flow, it is generally considered that there are at least an applicant for an account creation request and an approver for the account creation request on the system A side. When the applicant drafts and applies for an account creation request, the approver approves the account creation request. As a result of the approval, an account creation request is transmitted to the system B side. When defining the history of the approval flow, for example, information as shown in FIG. 8 is used. Hereinafter, this information is referred to as activity information.

  Here, the activity type is information indicating an event type in an approval flow such as “application”, “approval”, “return”, and “reapply”. The activity type is information indicating the type of activity executed. The activity execution date and time is information indicating the date and time when the activity is executed. The activity executor name is information indicating the name of the activity executor. The activity executor affiliation is information indicating the affiliation of the activity executor. The activity executor title is information indicating the title of the activity executor. The activity target is information indicating an object of an event in the approval flow, and is information that can identify “account creation request”.

  The definition of activity information described above is merely an example of information indicating the history of the approval flow. By using such activity information, the activity information is generated every time the approval flow is executed, and the background of execution in the approval flow can be expressed.

  As a typical example for realizing account provisioning, OASIS SPML (Service Provisioning Markup Language) V2.0 is known. FIG. 9 shows an example of a request message (addRequest message) for requesting account creation. In this example, it is requested to create an account with contents enclosed by <data> tag.

  As in this request message example, the request message describes information necessary for account creation. Generally, an internal approval flow on the side of sending a request message such as the activity information is not described. That is, even when a general account provisioning specification is used, the aforementioned activity information can be described in the extended description areas R43E and R33E and notified to the transmitting apparatus side.

  Next, with reference to FIGS. 10 to 14, the operation of the trail management system in the embodiment will be described.

  FIG. 10 is a sequence diagram illustrating an example of the operation of the entire trail management system. FIG. 11 is a flowchart illustrating an example of the operation on the transmission device 1 side. FIG. 14 is a flowchart illustrating an example of the operation on the receiving device 2 side. In addition, the same code | symbol is attached | subjected to the step which is mutually common.

  First, the operation on the transmission device 1 side will be described with reference to FIGS. 10 and 11.

  In step S <b> 11, the input interface unit 11 inputs input data including the content of the communication message passed from the transmission side application 1 </ b> A. This operation may be realized by an explicit call such as an API (Application Program Interface), or may be realized by intercepting a communication message content transmitted from a transmission side application such as a Proxy server. . At this time, it is desirable that the input data includes information necessary for transmission other than the communication message contents such as destination information.

  In step S12, the communication message content acquisition unit 12 acquires input data including the communication message content input by the input interface unit 11, and extracts the communication message content from the input data. The extracted communication message content is sent to the trail data generation unit 13.

  In step S13, the trail data generation unit 13 generates trail data from the received communication message content. The format of the trail data is converted in accordance with the format specified in advance as the data structure of the trail data description format described above. The predetermined format may be held in any form, may be held locally as a schema setting file, or may be determined by negotiation with an external device. The same applies to the format of the trail contents.

  Describing step S13 in more detail, the trail data generating unit 13 generates the trail content of the communication message content by converting the communication message content into a certain trail data description format (or trail content description format) (step S131). ), A trail content hash value is generated from the generated trail content using a certain hash algorithm (step S132), trail message data is generated using the generated trail content hash value (step S133), and the generated trail is generated. Trail data including the contents and the generated trail message data is generated (step 134).

  For example, consider an example in which the request message shown in FIG. 9 is transmitted to the destination “http; // example2.com/provisioningservice” as the communication message content.

  At this time, it is assumed that the format of the trail data corresponding to the account provisioning as shown in FIG. 12 is specified. As the event type, there is a predetermined defined type.

  If the request message (communication message content) is converted into the above-described trail data description format, it is converted into a form as shown in FIG. The actual data entity may be a flat description format in which each field is connected by a delimiter such as a blank character string, or may be configured in an XML description format. Information for identifying a specific format is indicated by a trail content description format name.

  Also, the trail data generation unit 13 calls the security processing unit 14 and the key management unit 15 as appropriate when security requirements are defined in the format of trail data. For example, when it is stipulated that the digital signature is applied as security requirements, the signature key corresponding to the digital signature algorithm (specifically, the private key corresponding to the public key certificate, etc.) and the verification key information The security processing unit 14 obtains a public key certificate (acquired information such as a URI indicating a public key certificate acquisition destination) from the key management unit and applies an electronic signature corresponding to the electronic signature algorithm. To entrust. When time information such as a time stamp is necessary, time information is acquired from the security processing unit 14. The time information may be generated as an internal function or may be acquired from an external time stamp service or the like.

  The trail data generated by the trail data generation unit 13 is sent to the trail data storage unit 16. The trail message data is sent to the communication message generator 17.

  In step S14, the trail data storage unit 16 stores the trail data. In the present embodiment, the storage destination is not limited. Preferable examples include a storage device such as a hard disk in the transmission device, an external storage medium, and a storage device such as a hard disk outside the transmission device.

  In step S15, the communication message generator 17 receives the communication message contents and the trail message data, and generates a communication message. The format of the communication message is preferably specified in advance, as is the format of the trail data. The generation of the communication message is preferably executed after the trail data is properly stored in the trail data storage unit.

  In step S <b> 16, when the communication message is generated, the communication unit 18 transmits the communication message to the receiving device 2.

  Next, the operation on the receiving device 2 side will be described with reference to FIG. 10 and FIG.

  In step S <b> 21, the communication unit 21 receives a communication message transmitted from the transmission device 1. The received communication message is sent to the communication message analysis unit 22.

  In step S22, the communication message analysis unit 22 extracts each piece of information included in the communication message. Specifically, communication message contents and trail message data are extracted. The communication message content is sent to the communication message content acquisition unit 23, and the trail message data is sent to the trail message data verification unit 24.

  In step S23, the trail message data verification unit 24 verifies the trail message data.

  Step S23 will be described in more detail. The trail message data verification unit 24 acquires the communication message content from the communication message content acquisition unit 23, and generates the trail content by performing conversion processing according to the trail content description format name (step S23). S231). Also, a trail content hash value is generated from the trail content according to the hash algorithm name (step S232). Further, it is verified from the generated trail content hash value and the trail message data that the electronic signature value is correct (step S23). In order to verify the digital signature value and acquire the verification key, the security processing unit 25 and the key management unit 26 are used, respectively. If the trail message data can be correctly verified, the trail message data and the trail contents are sent to the trail data generation unit.

  In step S24, the trail data generation unit 27 generates trail data from the trail contents and the trail message data. The trail contents of the trail data may be acquired from the trail message data verification unit 24 or may be generated by the trail data generation unit 27. When the trail data generation unit 27 generates, the trail message data verification unit 24 may cause the trail data generation unit 27 to generate the trail contents in the above-described step S23. The generated trail data is sent to the trail data storage unit 28.

  In step S25, the trail data storage unit 28 stores the trail data. In the present embodiment, the storage destination is not limited. Preferable examples include a storage device such as a hard disk in the transmission device, an external storage medium, and a storage device such as a hard disk outside the transmission device.

  In step S26, the communication message content acquisition unit 23 sends the communication message content to the receiving-side application 2A after saving the trail data.

  As described above, according to the first embodiment, it is possible to verify the completeness of the content of the communication message, and to reduce the amount of data stored in the communication message content for the purpose of trail management. In particular, the effect is large when the content of the communication message includes a lot of information unnecessary for the purpose of the trail.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the part which is common in the above-mentioned 1st Embodiment, and the description is abbreviate | omitted. Below, it demonstrates centering on a different part from the above-mentioned 1st Embodiment.

  The second embodiment is a modified example of the first embodiment described above, and the deployment form of the transmission device 1 and the reception device 2 is not a relay position as in the first embodiment, but the transmission side application. And intercepting communications with the receiving application.

  FIG. 15 is a diagram illustrating an example of a schematic configuration of a trail management system according to the second embodiment of the present invention.

  In this trail management system, a first information processing device (computer) (not shown) having a transmission side application 1A and a second information processing device (computer) device (not shown) having a reception side application 2A are connected via a network N. Connected. The transmission device 1 and the reception device 2 are also deployed on the same network N and can intercept communication between the transmission-side application 1A and the reception-side application 2A.

  FIG. 16 is a diagram illustrating an example of a functional configuration of the transmission device 1 illustrated in FIG.

  In the example of FIG. 16, an intercept unit 51 is provided instead of the input interface unit 11 in the example of FIG. The intercepting unit 51 is a function for intercepting communication between the transmitting-side application 1A and the receiving-side application 2A. This intercepting unit 51 monitors communications on the network N and detects a communication message sent from a specific transmission source. Preferably, a transmission source address (such as an IP address) to be monitored is held as an interception list and operates based on the interception list. Further, not only the transmission source but also the intercept list may be configured by combining the transmission source address and the destination address.

  FIG. 17 is a diagram illustrating an example of a functional configuration of the receiving device 2 illustrated in FIG.

  In the example of FIG. 17, an intercepting unit 61 is provided instead of the input interface unit 29 in the example of FIG. 3. The intercepting unit 61 is a function for intercepting communication between the transmitting-side application 1A and the receiving-side application 2A. This intercepting unit 61 monitors communication on the network N and detects a communication message transmitted from a specific transmission source. Preferably, a transmission source address (such as an IP address) to be monitored is held as an interception list and operates based on the interception list. Further, not only the transmission source but also the intercept list may be configured by combining the transmission source address and the destination address.

  Next, an example of the operation of the trail management system in the embodiment will be described with reference to FIG. The steps common to those in FIG. 10 are denoted by the same reference numerals.

  In step S30, the sending application 1A sends a communication message including the contents of the communication message to the receiving application 2A. Unlike the communication message in the first embodiment, this communication message is a general communication message. That is, this communication message does not include a transmission device and does not include trail message data. Hereinafter, this communication message is referred to as an original communication message in order to clearly distinguish it from the communication message in the first embodiment. Note that the original communication message is assumed to be sent in a plain text format that is not encrypted. However, when encryption is performed, it is desirable that the transmission device 1 shares the decryption key.

  In step S <b> 31, the intercepting unit 51 of the transmission device 1 intercepts the original communication message and sends the original communication message to the communication message content acquisition unit 12.

  Next, the transmission device 1 performs the same processing as steps S12 to S14 already described in FIG.

  Next, in step S32, the communication message generation unit S15 generates a communication message including original communication message identification information (or original communication message) that can identify the original communication message and trail message data. Here, FIG. 19 shows a configuration example of a communication message in the same embodiment. An original communication message area R34 shown in FIG. 19 is an area for storing original communication message identification information (or original communication message). Although the original communication message may be stored as it is, it is desirable to store only information that can identify the original communication message from the viewpoint of reducing the amount of information. For example, a hash value obtained by compressing the original communication message with a hash function or the like, identification information given to the original communication message, or the like can be considered. This area only needs to store information that allows the communication message and the original communication message to be associated with each other.

  In step S33, when the communication message is generated, the communication unit 18 transmits the communication message to the receiving device 2.

  On the other hand, the receiving-side application 2A receives the original communication message sent from the transmitting-side application 1A.

  In step S41, the intercepting unit 61 of the receiving device 2 intercepts the original communication message transmitted from the transmitting-side application 1A.

  In step S <b> 42, the communication unit 21 of the reception device receives the communication message transmitted from the transmission device 1.

  When both the original communication message and the communication message are received, the original communication message and the communication message are sent to the communication message analysis unit 22. At this time, the association between the original communication message and the communication message is made by information stored in the original communication message area R34 of the communication message 3 shown in FIG.

  In step S43, the communication message analysis unit 22 extracts each information included in the original communication message and the communication message. Specifically, the communication message analysis unit 22 analyzes the original communication message intercepted by the interception unit 61 and the communication message received by the communication unit 21, and is specified by the original communication message identification information included in the communication message. The content of the communication message is extracted from the original communication message, and the trail message data is extracted from the communication message.

  Next, the receiving device 2 performs the same processing as steps S23 to S25 already described in FIG.

  As described above, according to the second embodiment, in the case where the deployment form of the transmission device 1 and the reception device 2 is not in a relay position, but is configured to intercept communication between the transmission side application and the reception side application. In addition, the integrity of the content of the communication message can be verified, and the amount of data stored in the communication message content for the purpose of trail management can be reduced.

  Note that the method described in the above embodiment includes a magnetic disk (floppy (registered trademark) disk, hard disk, etc.), an optical disk (CD-ROM, DVD, etc.), a magneto-optical disk (MO) as programs that can be executed by a computer. ), And can be distributed in a storage medium such as a semiconductor memory.

  In addition, as long as the storage medium can store a program and can be read by a computer, the storage format may be any form.

  In addition, an OS (operating system) running on a computer based on an instruction of a program installed in the computer from a storage medium, MW (middleware) such as database management software, network software, and the like realize the above-described embodiment. A part of each process may be executed.

  Furthermore, the storage medium in the present invention is not limited to a medium independent of a computer, but also includes a storage medium in which a program transmitted via a LAN or the Internet is downloaded and stored or temporarily stored.

  Further, the number of storage media is not limited to one, and the case where the processing in the above embodiment is executed from a plurality of media is also included in the storage media in the present invention, and the media configuration may be any configuration.

  The computer according to the present invention executes each process in the above-described embodiment based on a program stored in a storage medium, and includes a single device such as a personal computer or a system in which a plurality of devices are connected to a network. Any configuration may be used.

  In addition, the computer in the present invention is not limited to a personal computer, but includes a processing unit, a microcomputer, and the like included in an information processing device, and is a generic term for devices and devices that can realize the functions of the present invention by a program. .

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

The figure which shows an example of schematic structure of the trail management system which concerns on the 1st Embodiment of this invention. The figure which shows an example of a function structure of the transmitter 1 shown in FIG. The figure which shows an example of a function structure of the receiver 2 shown in FIG. The figure which shows the data structure of the communication message 3 and the trail data 4. FIG. The figure which shows an example of the flow of the information processed in the transmitter. The figure which shows an example of the flow of the information processed in the receiver 2. The figure which shows an example of the extended description area | region for supplementing trail content. The figure which shows an example of activity information. The figure which shows an example of the request message which requests account creation. The sequence diagram which shows an example of operation | movement of the whole trail management system. The flowchart which shows an example of operation | movement by the side of the transmitter. The figure which shows an example of the format of the trail data corresponding to account provisioning. The figure which shows an example which converted the request message into the trail data description format. 6 is a flowchart showing an example of an operation on the receiving device 2 side. The figure which shows an example of schematic structure of the trail management system which concerns on the 2nd Embodiment of this invention. The figure which shows an example of a function structure of the transmitter 1 shown in FIG. The figure which shows an example of a function structure of the receiver 2 shown in FIG. The sequence diagram which shows an example of operation | movement of the trail management system in the embodiment. The figure which shows an example of a structure of the communication message in the same embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Transmission apparatus, 2 ... Reception apparatus, 10 ... Control part, 11 ... Input interface part, 12 ... Communication message content acquisition part, 13 ... Trail data generation part, 14 ... Security processing part, 15 ... Key management part, 15A ... Key storage unit, 16 ... trail data storage unit, 17 ... communication message generation unit, 18 ... communication unit, 20 ... control unit, 21 ... communication unit, 22 ... communication message analysis unit, 23 ... communication message content acquisition unit, 24 ... Trail message data verification unit, 25 ... security processing unit, 26 ... key management unit, 26A ... key storage unit, 27 ... trail data generation unit, 28 ... trail data storage unit, 29 ... output interface unit.

Claims (6)

A trail management system including a transmission device that transmits a communication message and a reception device that receives the communication message,
The transmitter is
A trail content of the communication message content is generated by converting the communication message content to be transmitted to the receiving device into a certain description format, a hash value is generated from the generated trail content using a hash algorithm, and the generated First identification information for specifying at least the description format, second identification information for specifying the hash algorithm, and third identification information for specifying the electronic signature algorithm using a hash value and a digital signature algorithm Generating trail message data including an electronic signature value obtained by performing security processing on the information group including the first identification information and the third identification information, and generating the generated trail content and the generated trail message data. First trail data generating means for generating trail data including:
First trail data storage means for storing the trail data generated by the first trail data generation means in a first recording medium;
Communication message generating means for generating a communication message including the communication message content and the trail message data generated by the first trail data generating means;
First communication means for transmitting the communication message generated by the communication message generation means to the receiving device;
The receiving device is:
Second communication means for receiving a communication message transmitted from the transmission device;
Analyzing the communication message received by the second communication means, and extracting the communication message content and the trail message data from the communication message;
By converting the communication message content extracted by the communication message analysis unit into a description format specified by the first identification information included in the trail message data extracted by the communication message analysis unit, the communication message Generating a trail content of the message content, generating a hash value from the generated trail content using a hash algorithm specified by the second identification information included in the trail message data, and generating the hash value The trail message data is falsified by confirming whether the digital signature value included in the trail message data is correct using the electronic signature algorithm specified by the third identification information included in the trail message data. Trail message data detection to verify whether or not And means,
Second trail data generation means for generating trail data including the generated trail content and the extracted trail message data when it is verified that the trail message data verification means has not been tampered with;
A trail management system comprising: second trail data storage means for storing the trail data generated by the second trail data generation means in a second recording medium. A transmitting device that transmits a communication message to a receiving device,
A trail content of the communication message content is generated by converting the communication message content to be transmitted to the receiving device into a certain description format, a hash value is generated from the generated trail content using a hash algorithm, and the generated First identification information for specifying at least the description format, second identification information for specifying the hash algorithm, and third identification information for specifying the electronic signature algorithm using a hash value and a digital signature algorithm Generating trail message data including an electronic signature value obtained by performing security processing on the information group including the first identification information and the third identification information, and generating the generated trail content and the generated trail message data. Trail data generation means for generating trail data including:
Trail data storage means for storing the trail data generated by the trail data generation means in a recording medium;
Communication message generating means for generating a communication message including the communication message content and the trail message data generated by the trail data generating means;
A transmission device comprising: a first communication unit that transmits the communication message generated by the communication message generation unit to the reception device. A receiving device for receiving a communication message transmitted from a transmitting device,
Communication means for receiving a communication message transmitted from the transmission device;
Analyzing the communication message received by the communication means, extracting communication message content and trail message data from the communication message;
By converting the content of the communication message extracted by the communication message analysis unit into a description format specified by the first identification information included in the trail message data extracted by the communication message analysis unit, the communication message Generating a trail content of the content, generating a hash value from the generated trail content using a hash algorithm specified by the second identification information included in the trail message data, and generating the hash value and the trail The trail message data is not falsified by checking whether or not the digital signature value included in the trail message data is correct using the electronic signature algorithm specified by the third identification information included in the message data. A trail message data verification means for verifying whether or not,
Second trail data generation means for generating trail data including the generated trail content and the extracted trail message data when it is verified that the trail message data verification means has not been tampered with;
A receiving apparatus comprising: second trail data storage means for storing the trail data generated by the second trail data generation means in a second recording medium. A transmission device that intercepts an original communication message including communication message content transmitted from a first device having a transmission-side application to a second device having a reception-side application, and transmits the communication message, and is transmitted from the transmission-side application A trail management system including a receiving device that intercepts the original communication message to be received and receives the communication message transmitted from the transmitting device;
The transmitter is
First intercepting means for intercepting an original communication message sent from the sending application to the receiving application;
A trail content of the communication message content is generated by converting the communication message content included in the original communication message intercepted by the first interception means into a certain description format, and a hash algorithm is used from the generated trail content Using the generated hash value and a digital signature algorithm, at least first identification information for specifying the description format, second identification information for specifying the hash algorithm, and the electronic Generating trail message data including an electronic signature value obtained by performing security processing on an information group including third identification information specifying a signature algorithm, and the first to third identification information, and generating the generated First generating trail data including trail content and the generated trail message data And trail data generation means,
First trail data storage means for storing the trail data generated by the first trail data generation means in a first recording medium;
Communication message generating means for generating a communication message including original communication message identification information capable of specifying the original communication message and trail message data generated by the first trail data generating means;
First communication means for transmitting the communication message generated by the communication message generation means to the receiving device;
The receiving device is:
Second intercepting means for intercepting an original communication message sent from the sending application to the receiving application;
Second communication means for receiving a communication message transmitted from the transmission device;
The original communication message identified by the original communication message identification information included in the communication message by analyzing the original communication message intercepted by the second intercepting means and the communication message received by the second communication means Extracting the communication message content from the communication message analyzing means for extracting the trail message data from the communication message;
By converting the communication message content extracted by the communication message analysis unit into a description format specified by the first identification information included in the trail message data extracted by the communication message analysis unit, the communication message Generating a trail content of the message content, generating a hash value from the generated trail content using a hash algorithm specified by the second identification information included in the trail message data, and generating the hash value The trail message data is falsified by confirming whether the digital signature value included in the trail message data is correct using the electronic signature algorithm specified by the third identification information included in the trail message data. Trail message data detection to verify whether or not And means,
Second trail data generation means for generating trail data including the generated trail content and the extracted trail message data when it is verified that the trail message data verification means has not been tampered with;
A trail management system comprising: second trail data storage means for storing the trail data generated by the second trail data generation means in a second recording medium. A transmission device that intercepts an original communication message including a communication message content transmitted from a first device having a transmission side application to a second device having a reception side application, and transmits the communication message to the reception device,
Intercepting means for intercepting an original communication message sent from the sender application to the receiver application;
A trail value of the communication message content is generated by converting the communication message content included in the original communication message intercepted by the intercepting means into a description format, and a hash value is generated using a hash algorithm from the generated trail content. And using the generated hash value and an electronic signature algorithm, at least first identification information for specifying the description format, second identification information for specifying the hash algorithm, and the electronic signature algorithm Generating trail message data including an electronic signature value obtained by performing security processing on an information group including the third identification information to be identified, and the first to third identification information, and the generated trail content; Trail data for generating trail data including the generated trail message data And forming means,
Trail data storage means for storing the trail data generated by the trail data generation means in a recording medium;
Communication message generating means for generating a communication message including original communication message identification information capable of specifying the original communication message and trail message data generated by the trail data generating means;
A transmission device comprising: a communication unit configured to transmit the communication message generated by the communication message generation unit to the reception device. A receiving device for intercepting an original communication message including communication message contents transmitted from a first device having a transmission side application to a second device having a reception side application and receiving the communication message transmitted from the transmission device Because
Intercepting means for intercepting an original communication message sent from the sender application to the receiver application;
Communication means for receiving a communication message transmitted from the transmission device;
Analyzing the original communication message intercepted by the intercepting means and the communication message received by the communication means, the communication message content from the original communication message specified by the original communication message identification information included in the communication message A communication message analyzing means for extracting trail message data from the communication message,
By converting the content of the communication message extracted by the communication message analysis unit into a description format specified by the first identification information included in the trail message data extracted by the communication message analysis unit, the communication message Generating a trail content of the content, generating a hash value from the generated trail content using a hash algorithm specified by the second identification information included in the trail message data, and generating the hash value and the trail The trail message data is not falsified by checking whether or not the digital signature value included in the trail message data is correct using the electronic signature algorithm specified by the third identification information included in the message data. A trail message data verification means for verifying whether or not,
Trail data generation means for generating trail data including the generated trail content and the extracted trail message data when it is verified that the trail message data verification means has not been tampered with;
A receiving apparatus comprising: trail data storage means for storing the trail data generated by the trail data generation means in a recording medium.

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