JP2011101192A - Transmission apparatus and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission apparatus and method for enabling a third person to certify the evidence of a transaction of electronic commerce in electronic commerce, or the like. <P>SOLUTION: The transmission apparatus 301 includes: a conversion circuit 12 for converting transmission data into data for verification by using a specific conversion system and converting data to be certified into data to be verified by the conversion system; a storage circuit 13 for storing combination information obtained by combining information for identification which can identify communication information of the transmission data with the data for verification converted by the conversion circuit 12; and a comparison circuit 14 for extracting the data for verification with which the information for identification having the same contents as information for identification to be certified attached to the data to be certified is combined from the combination information stored by the storage circuit 13 to compare the data to be verified with the data to be certified converted by the conversion circuit 12 with the extracted data for verification. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a transmission apparatus and a transmission method for preventing falsification of electronic data between senders and receivers.

  In recent years, the need for proof of content of telecommunications by a third party has increased. For example, confirmation of the presence or absence of falsification by a monitoring information management entity or unauthorized access authority, such as a transaction such as an electronic contract.

  The former is a surveillance video or the like of a surveillance camera or the like installed on a street corner or a building. These pieces of information are starting to be stored as digital information from the viewpoints of cost reduction, searchability, etc. for codecs and hard disk drives. It seems that this digital information can be easily tampered with using the results of research on virtual reality that can be combined with real-time images and virtual reality images in real-time without any sense of incongruity. . It is a problem that falsification and concealment of crime occur due to tampering, and if it can not be proved that there is no tampering, the monitoring information itself may become meaningless.

  The latter is electronic commerce such as B-to-B and B-to-C, which have been increasing rapidly in recent years. Unlike communication lines such as telephones and facsimiles, a configuration of an open network such as the Internet demands proof that electronic information of transaction contents has not been tampered with in order to maintain the safety of commercial transactions.

  Known methods for confirming the presence or absence of falsification of electronic information include a method such as electronic certification using public key cryptography and a detection method of falsification presence or absence using a one-way function (see, for example, Patent Document 1). ing. In order to prevent falsification of electronic information, the falsification detection method disclosed in Patent Document 1 stores a value obtained by inputting electronic information Mi and a value Ti that guarantees the order into a one-way function f. The person who has received the electronic information Mi and the value Ti that guarantees the order can modify the value obtained by inputting Mi and Ti to the one-way function f with the stored value. Detect the presence or absence. By using the above method, electronic certification by a third party can be performed.

JP 2002-244555 A

  With the future progress of the US Sarbanes-Oxley Act (SOX Act), which has recently been introduced, it is considered that it is also required to maintain records of contract transactions. For example, in order to prevent falsification of financial statements and delivery date, and to prevent both parties of commerce from displaying and rewriting the transaction as a false transaction, third-party certification such as a delivery trace of a courier is required. It is done.

  However, the method for confirming whether or not the electronic information has been tampered with can guarantee the order, but cannot guarantee the communication time information and the address information for both transmission and reception. Is insufficient. Furthermore, the above-described method is a method for preventing electronic information stored in the first place from being altered by cracking by a person who does not have access authority to the electronic information. Therefore, tampering by a party of a commercial transaction that stores electronic information with access authority is not considered in the first place, and is not a preventive measure and can be easily tampered with. What kind of transaction is exchanged at which communication time, and it cannot be proved that the malicious parties created the fake transaction or altered the transaction contents by showing each other together, and will support future SOX law There is a problem that it is not done.

  In addition, there may be a method of requesting an electronic signature with a time stamp from a third party in the above-mentioned electronic commerce, attaching the electronic signature, and having it transferred to the other party. Exists. The first problem is that the possibility of information leakage increases because the number of times of transfer increases because the number of times of transfer is increased because of the transfer through a third party organization that is not necessary. Even if a third-party organization does not intend to leak information, if the information to be signed is stored for future inspection by the national authorities or audit of corporate activities, There is a risk of leaking to unrelated third parties. Moreover, if it is stored without inspection, the risk of information leakage increases due to cracking by a person without access authority. Even if the content of the information itself is not leaked, there is a risk that information on the existence of transactions with which counterparties and how much business transactions exist will be widely disclosed in audits of corporate activities. Unnecessary disclosure is not desired because the transaction presence information itself is useful information for business sales to the same company. The second problem is that the proof by the electronic signature has a processing speed bottleneck because of a large calculation load. Since the certification by the electronic signature is realized by the enormous calculation time required for the calculation, the calculation load of the computing device at that time is always large. Therefore, special hardware such as a dedicated arithmetic device is necessary for processing in large quantities, and it is assumed that it is difficult to meet future explosive demand. The third problem is that there is a risk of falsification due to advances in decoding technology and computing power. The current cryptographic technology is retained by the enormous calculation time required for decryption and tampering. However, computing power and decryption technology are improving day by day, and it is possible for the parties holding the calculation method, data to be signed and the signature itself to forge electronic signatures with future advanced decryption technology and computational power. Sometimes. In the case of cryptographic technology, if a legal document such as a slip has a retention period of, for example, 7 years, it is necessary to prevent tampering after 7 years.

  In order to solve these problems, the present invention holds information for identifying communication contents together with information for certifying the contents of electronic information communicated in relation to transactions and monitoring information in electronic commerce and monitoring information communication. E-commerce transaction trails and monitoring information can be transferred between e-commerce parties and monitoring information without any unnecessary transfer other than transmission between the parties of e-commerce or between the monitoring device and the monitoring information storage device from the monitoring device. It is an object of the present invention to provide a transmission device and a transmission method that can be proved by a third party other than the person who stores the information.

  In order to achieve the above object, a transmission apparatus and a transmission method according to the present invention hold a calculated value of electronic information converted by using a specific conversion method in a transmission apparatus between a sender and a receiver, a communication date and time, and transmission / reception. It has a mechanism to hold information for identifying communication such as the address information of the person.

  Specifically, a transmission apparatus according to the present invention includes a conversion circuit that converts transmission data into data for verification using a specific conversion method, and converts data to be verified into data for verification using the conversion method. A storage circuit that stores combination information obtained by combining identification information that can identify communication information of the transmission data and the collation data converted by the conversion circuit, and the combination information stored by the storage circuit. The verification data in which the identification information having the same content as the verification identification information attached to the verification data is combined, and the verification data is converted by the conversion circuit. A comparison circuit for comparing the data and the extracted data for verification.

  The transmission method according to the present invention includes a first conversion procedure for converting transmission data to verification data using a specific conversion method, identification information for identifying communication information of the transmission data, and conversion using the first conversion procedure. A storage procedure for storing combination information obtained by combining the verification data, a second conversion procedure for converting data to be verified into data to be verified by the specific conversion method in the conversion procedure, and the storage procedure The verification data in which the identification information having the same content as the verification identification information attached to the certified data is extracted from the combination information stored in the verification data, and the verification data is A comparison procedure for comparing the data to be verified converted in the second conversion procedure with the extracted data for verification.

  The transmission apparatus and the transmission method according to the present invention generate a certain value of verification data from transmission data including electronic information that should be prevented from being tampered with using a specific conversion method. The generated verification data is held together with information that can identify the transmission data by communication time, address, and the like. When verifying the contents, data to be verified is generated by using the conversion method for the data to be verified including the electronic information that should be prevented from being tampered with from the requester. The target verification data is found from the verification target data and the stored verification data, the verification target data is compared with the verification data, and the communication content is proved by being the same value.

  By installing such a transmission device, the electronic commerce information and the monitoring information are transmitted via the transmission device, so that it is not necessary to transfer to a third-party organization for authentication which is not originally required. Since the method is not presented to the trader itself, it is possible to apply operations with less processing, so there is no bottleneck in processing speed, and there is no fear of falsification due to advanced decoding technology and computing power in the future. In addition, since confidential data that is data to be verified is not held, a third party can prove a trail of an electronic commerce transaction without knowledge, and it can also be found that the trader himself has falsified.

  Therefore, the present invention can provide a transmission apparatus and a transmission method in which information relating to communication is stored together with electronic information of transaction contents in electronic commerce and the like, and a third party can prove a trail of the transaction of the electronic commerce.

  The transmission apparatus according to the present invention further includes a correction information generation circuit that generates correction information for error correction of the transmission data and / or combination information. The storage circuit stores the correction information generated by the correction information generation circuit in the combination information. The conversion circuit extracts the correction information in which the identification information having the same contents as the identification information to be certified attached to the certification data is combined from the combination information stored in the storage circuit, If necessary, error correction is performed on the data to be certified or / and combination information, and the data to be verified is converted to data to be verified or / and error correction is performed on the data to be verified as necessary. Do. Here, in the error correction for the data to be verified, whether or not the difference between the newly generated data and the Hamming distance between the data for verification stored as a part of the combination information can be corrected to an allowable range. It is also possible to correct the error by making a determination.

  The transmission method according to the present invention further includes a correction information generation procedure performed before and / or after the first conversion procedure, and an error correction procedure performed before or / and after the second conversion procedure. In the correction information generation procedure, correction information for error correction of the transmission data and / or combination information is generated. In the accumulation procedure, the correction information generated in the correction information generation procedure is also included in the combination information and stored. In the error correction procedure, the correction information in which the identification information having the same content as the certification identification information attached to the certification data is combined from the combination information stored in the accumulation procedure. The data is taken out and error correction is performed on the data to be certified or / and combination information as necessary. In the second conversion procedure, the data to be certified is converted into data to be verified, and / or error correction is performed on the data to be verified as necessary. Here, in the error correction for the data to be verified, whether or not the difference between the newly generated data and the Hamming distance between the data for verification stored as a part of the combination information can be corrected to an allowable range. It is also possible to correct the error by making a determination.

  When an error at the time of storing combination information is corrected, a value related to correction information for error correction is also included in the combination information and held. The communication content is proved by using the data to be verified obtained by converting the data to be certified after error correction at the time of content certification by a specific conversion method. It is possible to reduce the risk of erroneously determining that appropriate communication information has been tampered with based on an error when storing combination information.

  The storage circuit of the transmission device according to the present invention stores the conversion method information of the conversion method used in the conversion circuit in the combination information. The conversion circuit changes the conversion method every predetermined period, and converts the certified data from the combination information stored in the storage circuit to the certified data when converting the certified data into data to be verified. The conversion method information in which the identification information having the same contents as the attached identification information for identification is combined is extracted, and the data to be verified is converted into data to be verified by the conversion method based on the extracted conversion method information. Convert.

  In the transmission method according to the present invention, the conversion method used in the first conversion procedure is changed every predetermined period. In the accumulation procedure, the conversion method information of the conversion method used in the first conversion procedure is also included in the combination information and stored. In the second conversion procedure, when converting the data to be verified to data to be verified, out of the combination information stored in the storage procedure, information for verification identification attached to the data to be verified The conversion method information combined with the identification information having the same content is extracted, and the data to be certified is converted into data to be verified by the conversion method based on the extracted conversion method information.

  Since the transmission apparatus and the transmission method according to the present invention change the conversion method every predetermined period, it is difficult to falsify later, and the third party who has proved that the transmission data itself is not held is also falsified. Is difficult, and the safety of commerce increases. Furthermore, it suppresses that it is guessed by frequently switching the calculation used for conversion, while preventing transmission data that has been guessed and falsified accordingly, from being determined to be the same as past transmission data, Can prove electronic information without knowledge.

  In the transmission apparatus according to the present invention, the transmission data is an optical signal, and the conversion circuit performs an arithmetic process on an electrical signal obtained by photoelectrically converting the transmission data, and performs an arithmetic process on the transmission data as light. It converts into the said data for collation by converting or the combination of both, It is characterized by the above-mentioned.

  In the transmission method according to the present invention, the transmission data is an optical signal, and in the first conversion procedure, arithmetic processing is performed on an electrical signal obtained by photoelectrically converting the transmission data, and arithmetic processing is performed before photoelectrically converting the transmission data. Or the combination thereof is converted into the verification data.

  In the transmission apparatus according to the present invention, the transmission data is an optical signal, and the conversion circuit performs an arithmetic process on an electrical signal obtained by photoelectrically converting a beat signal generated by the transmission data and reference light, and the transmission data is photoelectrically converted. Before the conversion, a beat signal generated by arithmetic processing and photoelectric conversion with reference light is used, or conversion into the verification data is performed by a combination of both.

  In the transmission method according to the present invention, the transmission data is an optical signal. In the conversion procedure, an electrical signal obtained by photoelectrically converting a beat signal generated by the transmission data and reference light is arithmetically processed, and the transmission data is photoelectrically converted. Before the conversion, a beat signal generated by arithmetic processing and photoelectric conversion with reference light is used, or conversion into the verification data is performed by a combination of both.

  Since the processing is performed with the optical signal as it is, the processing speed can be increased.

  The conversion circuit of the transmission apparatus according to the present invention is characterized in that only the transmission data having a predetermined identifier is converted into the data to be verified.

  In the first conversion procedure of the transmission method according to the present invention, only the transmission data having a predetermined identifier is converted into the data to be verified.

  Instead of converting all transmission data into verification data, only the transmission data that requires certification is converted into verification data, reducing the amount of verification data to be stored and improving the data search speed during certification. be able to.

  The present invention can provide a transmission apparatus and a transmission method in which information relating to communication in electronic commerce or the like is held together with electronic information of transaction contents, and a third party can prove a trail of an electronic commerce transaction.

It is a block diagram explaining the transmission apparatus which concerns on this invention. It is a block diagram explaining the transmission apparatus which concerns on this invention.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below are examples of the present invention, and the present invention is not limited to the following embodiments. In the present specification and drawings, the same reference numerals denote the same components.

(Embodiment 1)
FIG. 1 is a block diagram illustrating a transmission apparatus 301 according to this embodiment. The transmission apparatus 301 converts the transmission data into verification data using a specific conversion method, and converts the data to be verified into verification data using the conversion method, and communication information of the transmission data Storage information for storing combination information obtained by combining identification information that can be identified with the data for verification converted by the conversion circuit 12, and the combination information stored by the storage circuit 13 from the combination information stored in the data to be proved The verification data combined with the identification information having the same content as the attached identification information to be certified is extracted, and the verification data is extracted with the verification data converted by the conversion circuit 12 And a comparison circuit 14 for comparing the verification data.

  The transmission method of the transmission apparatus 301 includes a first conversion procedure for converting transmission data into verification data using a specific conversion method, identification information that can identify communication information of the transmission data, and conversion using the first conversion procedure. A storage procedure for storing combination information obtained by combining the verification data, a second conversion procedure for converting data to be verified into data to be verified by the specific conversion method in the conversion procedure, and the storage procedure The verification data in which the identification information having the same content as the verification identification information attached to the certified data is extracted from the combination information stored in the verification data, and the verification data is A comparison procedure for comparing the verification data converted in the second conversion procedure with the extracted verification data.

  The transmission apparatus 301 includes a transmission unit 102 and a certification unit 101. The transmission means 102 branches the input transmission data, outputs one to another transmission apparatus, and couples the other to the certification means 101. The proving means 101 includes an identification circuit 11, a conversion circuit 12, a storage circuit 13, a collation receiving circuit 15 and a comparison circuit 14.

  The conversion circuit 12 desirably converts only transmission data having a predetermined identifier into data to be verified. In this case, the proving means 101 includes an identification circuit 11. The identification circuit 11 uses transmission identifiers to be prevented from being tampered with predetermined identifiers such as PON (Passive Optical Network) logical link identification information (LLID: Logical Link ID) and virtual LAN (VLAN: Virtual Local Area Network) tags. The transmission data corresponding to the predetermined identifier is passed to the conversion circuit 12 when not limited and the transmission data corresponding to the predetermined identifier is passed to the conversion circuit 12. The identifier to be identified may be included in a specific value range in advance, or may be acquired by monitoring a control signal such as SIP (Session Initiation Protocol) by snooping, or in the transmission apparatus 301. It may be set.

  The conversion circuit 12 converts the transmission data into data for verification using a specific conversion method, and converts the data to be certified into data for verification using the conversion method. The conversion circuit 12 generates a value by a specific conversion method from a transmission data block including electronic information that should be prevented from being tampered with when data is transmitted by the transmission apparatus 301. The specific conversion method is, for example, a public key method or a method using a one-way function. The one-way function is a hash function such as SHA1 or MD5, which is a calculation method that has one-way conversion and collision difficulty and has a low calculation load.

  The storage circuit 13 stores combination information obtained by combining identification information that can identify communication information of transmission data and collation data converted by the conversion circuit 12. Specifically, the storage circuit 13 holds the collation data converted by the conversion circuit 12 as combination information together with identification information that can identify communication information. The identification information includes, for example, the communication time of transmission data, the source and destination addresses, and the like. Here, since the conversion circuit 12 uses the one-way function, the storage circuit 13 does not need to store information included in the transmission data, for example, confidential information. For this reason, the transmission apparatus 301 can prove transmission data without knowledge.

  For example, when the conversion circuit 12 randomly switches the unidirectional function and the seed used in the calculation, the storage circuit 13 includes the unidirectional function used for generating the matching data and the seed used in the calculation in the combination information. Stored combination information.

  The verification accepting circuit 15 uses, as a verification request, identification data for identifying data to be proved including information that should be prevented from being falsified as a new certification target, and transmission data transmitted by the transmission means 102 in the past. Accept.

  Here, the conversion circuit 12 converts the data to be certified requested for certification based on the identification information from the verification receiving circuit 15 by the same conversion method as the conversion method in which the transmission data transmitted by the transmission means 102 is converted in the past. Thus, data to be verified is generated.

  The comparison circuit 14 first matches the verification data in which the identification information having the same content as the verification identification information attached to the verification data is combined from the combination information stored in the storage circuit 13. Take out. Then, the comparison circuit 14 compares the data to be verified obtained by converting the data to be certified by the conversion circuit 12 with the extracted data for verification. Further, the comparison circuit 14 determines whether the data to be verified and the data to be verified have the same value, and if they are the same value, proves that the data to be verified has the same content as the transmission data communicated in the past. When detecting whether or not they are the same value, an error of a fixed number, a fixed amount, or a fixed ratio of a series of data strings such as stream data may be allowed.

  Here, in the identification information, regarding a value that may cause an error for each device such as a communication time, an error range, for example, if the error is in minutes, the accumulated value corresponding to the minute unit. In this range, it is desirable to search for data to be verified that has the same value as the data to be verified. In addition, when the transmission of transmission data including information that should be prevented from being altered is proved at both the entrance and the exit of the network, it is desirable that the transmission data in the range to be converted by the conversion circuit 12 does not change in the network. . For example, in the case of an IP packet, the value of TTL is subtracted by 1 and changes through the normal router. For this reason, the conversion circuit 12 excludes a value that may be changed during transmission of TTL or the like from the range to be converted. In a communication system that encapsulates and transmits in a network, the conversion circuit 12 converts data that changes from the conversion target, or converts the change in the network and converts it.

  In addition, although it is set as the structure which receives the collation reception to the collation reception circuit 15 directly, you may receive via the transmission line which transmits the to-be-certified data of certification object. At the time of collation, the conversion circuit 12 generates the collation information by the same circuit at the time of transmission and at the time of collation, but each may have a different circuit. Regarding the information for identification, even if it is transmitted to the sender or receiver of the transmission data, it does not lead to falsification of the transmission data, so it can be sent to the transmission data sender or receiver for later verification. Good. However, the information for identification to be transmitted to the sender and the receiver described here does not naturally include information that may lead to falsification of the conversion method or the value of the seed of calculation.

  Although the transmission device 301 includes the storage circuit 13 in the proving means 101, it may be provided outside the transmission device 301. Further, the combination information including the verification data may be transferred from the storage circuit 13 in the proving means 101 to an external storage device as necessary. When the external storage device stores the combination information, when a verification request is received, the data to be proved is generated by the same conversion method as the certification means 101 provided in the transmission device 301, and the verification data and the data to be verified are stored. You may compare with the data for collation.

  Since the transmission device 301 holds the combination data together with the identification data that allows the storage circuit 13 to identify the verification data and the communication information, a third party can prove the trail of the electronic commerce transaction. Further, the conversion circuit 12 converts the transmission data into the verification data using a one-way function, and the following effects can be obtained. The effect is that high-speed calculation is easy and high-speed broadband transmission is possible, that it is difficult to tamper with later, that it is not easy to tamper with a certified third party, and that the content of the information to be transmitted is It is possible to prove transmission without knowledge.

(Embodiment 2)
FIG. 2 is a block diagram illustrating the transmission apparatus 302 according to the present embodiment. The difference between the transmission apparatus 302 and the transmission apparatus 301 in FIG. 1 is that the transmission apparatus 302 further includes a correction information generation circuit 21 and a correction information storage circuit 22. The correction information generation circuit 21 generates correction information for correcting some or all of the transmission data and / or combination information. The correction information generation means 21 may be integrated with the conversion circuit 12.

  The correction information storage circuit 22 stores the correction information generated by the correction information generation circuit 21. In the transmission apparatus 302, the correction information, the collation data, and the identification information are stored in different circuits, but the correction information, the collation data, and the identification information are combined with each other to form combination information. The correction information storage circuit 22 may be integrated with the storage circuit 13.

  The conversion circuit 12 of the transmission apparatus 302 converts the correction information in which the identification information having the same content as the identification information to be certified attached to the certification data is combined from the combination information into a correction information storage circuit 22, and if necessary, perform error correction on the data to be certified or / and combination information, and the error correction circuit converts the data to be verified that has been subjected to error correction into data to be verified or / and Error correction is performed on the generated data to be verified as necessary. Here, in the error correction for the data to be verified, whether or not the difference between the newly generated data and the Hamming distance between the data for verification stored as a part of the combination information can be corrected to an allowable range. It is also possible to correct the error by making a determination.

  The transmission apparatus 302 includes a correction information generation procedure performed before and / or after the first conversion procedure and an error correction procedure performed before or after the second conversion procedure in the transmission method described in the transmission apparatus 301 of FIG. And. In the correction information generation procedure, the correction information generation circuit 21 generates correction information for error correcting part or all of the transmission data and / or combination information. Further, in the storage procedure, the correction information storage circuit 22 stores the correction information in the combination information. At the time of requesting certification, in the second error correction procedure, the identification information having the same content as the certification identification information attached to the certification data is combined from the combination information stored in the accumulation procedure. The correction information is taken out, and error correction is performed on the data to be certified or / and combination information if necessary. Subsequently, in the second conversion procedure, the conversion circuit 12 converts the certified data into data to be verified and / or performs error correction on the data to be verified as necessary. Here, in the error correction for the data to be verified, whether or not the difference between the newly generated data and the Hamming distance between the data for verification stored as a part of the combination information can be corrected to an allowable range. It is also possible to correct the error by making a determination.

  When the transmission device 302 generates verification information from transmission data including information that should be prevented from being falsified, the transmission device 302 also generates correction information related to error correction, and holds the correction information, identification information, and verification data as combination information. Then, at the time of content certification, error correction is performed on the data to be certified or / and combination information, and the communication content is proved using the data to be verified converted by the conversion circuit 12. For this reason, even when a transmission error during transmission and an error during storage occur, it is possible to reduce erroneous determination that erroneously determines that transmission data transmitted in the past is not transmitted.

  Correction information that does not lead to falsification of the transmission data even if it is transmitted to the transmission data sender or receiver may be sent to the transmission data sender or receiver.

  The transmission device 302 includes the correction information storage unit 22 in the certification unit 103, but the correction information storage unit 22 is provided outside the transmission device 302 in the same manner as the storage circuit 12 described in the transmission device 301 of FIG. Also good. Further, the proving means 103 may move the correction information from the correction information storage circuit 22 to an external storage device as necessary. When correction information is stored in an external storage device, when a verification request is received, data to be verified is generated using the same correction information as that of the certifying means 103 provided in the transmission device 302, and for verification The data may be compared with the data to be verified.

  The transmission apparatus 302 can also obtain the following effects in addition to the effects of the transmission apparatus 301 of FIG. The effect is that even if an error occurs in the transmission line and the storage circuit 13, the error occurrence can be reproduced when a certification request is made and erroneous determination can be reduced.

(Embodiment 3)
The transmission apparatus 301 and the transmission apparatus 302 may change the conversion method every predetermined period. In this case, the storage circuit 13 stores the conversion method information of the conversion method used in the conversion circuit 12 in the combination information. Then, the conversion circuit 12 is the same as the identification information to be certified attached to the certification data from the combination information stored in the storage circuit 13 when the certification data is converted to verification data. The conversion method information combined with the identification information of the content is extracted, and the data to be certified is converted into data to be verified by the conversion method based on the extracted conversion method information.

  In the transmission method of this embodiment, in the storage procedure described in Embodiment 1, the conversion method information of the conversion method used by the storage circuit 13 in the first conversion procedure is also included and stored in the combination information. In the second conversion procedure, the conversion circuit 12 is attached to the certified data from the combination information stored in the storage procedure when the certified data is converted into data to be verified. The conversion method information in which the identification information having the same content as the identification information to be proved is combined is extracted, and the data to be proved is converted into data to be verified by the conversion method based on the extracted conversion method information. .

  The conversion circuit 12 appropriately changes the calculation method of the conversion method or the value that is the seed of the calculation. The storage circuit 13 holds the calculation method or the value that is the seed of the calculation in the combination information. The conversion circuit 12 converts the data to be proved using a value recalculated using the calculation method used at the time of content certification or a value that becomes a seed of calculation.

  The conversion circuit 12 appropriately changes the value that becomes the calculation method or the seed of calculation, and the storage circuit 13 holds the value that becomes the seed of the calculation method or the calculation, so that the following effects can be further obtained. Even if the calculation method or calculation seed value currently used by the conversion circuit 12 is estimated by a third party, the estimated calculation method or calculation seed value is used in the transmission data to be tampered with. Probability that is different from the previous calculation method or the value that is the seed of the calculation increases, so it is prevented that the data to be proved altered by the conversion method based on the estimated value is the same as the transmission data transmitted in the past There is an effect to.

  In the present embodiment, the calculation circuit or the value that is the seed of calculation is stored in the storage circuit 13, but may be stored in an external storage device in the same manner as the storage circuit 13 described in the transmission device 301 of FIG. 1. Further, the proving means (101, 103) may move a calculation method or a value that is a seed of calculation to an external storage device as necessary. When the calculation method or the value that is the seed of the calculation is stored in an external storage device, the same calculation as the verification means (101, 103) included in the transmission device (301, 302) is received when a verification request is received. Data to be verified may be generated using a value that is a seed of a law or calculation, and the comparison data and the data to be verified may be compared.

  In addition to the effects of the transmission apparatuses of the first and second embodiments, the transmission apparatus of the present embodiment can also obtain the following effects. The effect is that it is possible to prevent the data to be certified that has been estimated based on the calculation method or the seed of the calculation and has been falsified accordingly to be determined to be the same as the transmission data transmitted in the past.

(Embodiment 4)
In the transmission apparatus 301 and the transmission apparatus 302, the transmission data may be an optical signal. In this case, the conversion circuit 12 performs arithmetic processing such as addition, subtraction, multiplication, and division on the electric signal obtained by photoelectrically converting the transmission data, or before photoelectrically converting the transmission data, the phase, polarization, path, optical nonlinear process, The data is converted into the verification data by arithmetic processing such as filtering and filtering. Also, the transmission data may be converted into verification data by combining electric and optical arithmetic processing.

  The transmission apparatus according to the present embodiment performs optical processing on an optical signal as it is to generate data for verification and data for verification. Since processing is performed in the state of an optical signal, the processing speed can be increased. For example, the transmission data of the optical signal is branched as it is by the transmission means 102 and merged with a delay added. The conversion circuit 12 photoelectrically converts this optical signal and adds / subtracts / subtracts the electrical signal to generate verification data and data to be verified. For example, the transmission means 102 composes an optical lattice filter or an optical FIR filter by using an optical branching device and a delay line, thereby synthesizing a temporally shifted optical signal.

  The transmission apparatus according to the present embodiment can easily perform high-speed calculations and can perform high-speed and wide-band transmission.

(Embodiment 5)
In the transmission apparatus according to the present embodiment, before the conversion circuit 12 performs arithmetic processing such as filtering, addition / subtraction / multiplication / division on the beat signal generated when the transmission data and the reference light are photoelectrically converted, or before the transmission data is photoelectrically converted. It is characterized in that it is converted into the verification data by using a beat signal generated by performing an arithmetic processing on the signal and performing photoelectric conversion with reference light. Further, the transmission data may be converted into verification data by combining beat signal calculation processing and light calculation processing.

  The difference between the transmission apparatus of the present embodiment and the transmission apparatus of the fourth embodiment is the conversion method performed by the conversion circuit 12. In the transmission apparatus of the fourth embodiment, the direct detection component is added, subtracted, multiplied, and divided. In the transmission apparatus of the present embodiment, the beat signal is added, subtracted, multiplied, and divided. The transmission apparatus according to the present embodiment is also capable of high-speed calculation and capable of high-speed and wide-band transmission. The optical signal may be added / subtracted / divided before / after photoelectric conversion.

11: Identification circuit 12: Conversion circuit 13: Storage circuit 14: Comparison circuit 15: Verification reception circuit 21: Correction information generation circuit 22: Correction information storage circuit 101, 103: Proof means 112: Transmission means 301, 302: Transmission device

Claims (12)

A conversion circuit that converts transmission data into data for verification using a specific conversion method, and converts data to be verified into data for verification in the conversion method;
A storage circuit for storing combination information obtained by combining identification information that can identify communication information of the transmission data and the verification data converted by the conversion circuit;
From the combination information stored in the storage circuit, the verification data combined with the identification information having the same content as the verification identification information attached to the verification data is extracted, and the verification data A comparison circuit for comparing the data to be verified converted by the conversion circuit with the extracted data for verification;
A transmission apparatus comprising: A correction information generation circuit for generating correction information for error correction of the transmission data or / and the combination information;
Further comprising
The storage circuit includes the correction information generated by the correction information generation circuit in the combination information and stores the correction information.
The conversion circuit extracts the correction information in which the identification information having the same contents as the identification information to be certified attached to the certification data is combined from the combination information stored in the storage circuit, The error-corrected data or / and the combination information is subjected to error correction, and the error-corrected circuit performs error correction to convert the proved data into data to be verified or / and to the data to be verified The transmission apparatus according to claim 1, wherein error correction is performed. The storage circuit stores the conversion method information of the conversion method used in the conversion circuit, including the combination information,
The conversion circuit changes the conversion method every predetermined period, and converts the certified data from the combination information stored in the storage circuit to the certified data when converting the certified data into data to be verified. The conversion method information in which the identification information having the same contents as the attached identification information for identification is combined is extracted, and the data to be verified is converted into data to be verified by the conversion method based on the extracted conversion method information. The transmission apparatus according to claim 1, wherein the transmission apparatus performs conversion. The transmission data is an optical signal;
The conversion circuit performs an arithmetic process on an electric signal obtained by photoelectrically converting the transmission data, performs an arithmetic process before photoelectrically converting the transmission data, or calculates the transmission data by combining both arithmetic processes. 4. The transmission apparatus according to claim 1, wherein transmission data is converted into the verification data. The transmission data is an optical signal;
The conversion circuit performs an arithmetic process on an electrical signal obtained by photoelectrically converting a beat signal generated by the transmission data and the reference light, and performs a beat process by performing an arithmetic process on the transmission data before photoelectrically converting the transmission data and performing a photoelectric conversion on the reference light. 4. The transmission apparatus according to claim 1, wherein the transmission data is converted into the verification data by using a signal or calculating the transmission data by combining both arithmetic processes.   The transmission apparatus according to claim 1, wherein the conversion circuit converts only the transmission data having a predetermined identifier into the data to be verified. A first conversion procedure that uses a specific conversion method to turn the transmitted data into data for verification;
An accumulation procedure for storing combination information obtained by combining identification information that can identify communication information of the transmission data and the collation data converted in the first conversion procedure;
A second conversion procedure for converting the data to be verified into data to be verified by the specific conversion method in the conversion procedure;
From the combination information stored in the accumulation procedure, the verification data combined with the identification information having the same content as the verification identification information attached to the verification data is extracted, and the verification target is extracted. A comparison procedure in which the verification data is converted by the second conversion procedure and the compared data is compared with the extracted verification data;
A transmission method. Correction information generation procedure performed before and / or after the first conversion procedure;
An error correction procedure performed before the second conversion procedure;
Further comprising
In the correction information generation procedure, generate correction information for error correction of the transmission data or / and the combination information,
In the accumulation procedure, the correction information generated in the correction information generation procedure is also included in the combination information and stored.
In the error correction procedure, the correction information in which the identification information having the same content as the certification identification information attached to the certification data is combined from the combination information stored in the accumulation procedure. Take out, perform error correction on the data to be certified or / and the combination information,
8. The transmission method according to claim 7, wherein in the second conversion procedure, the data to be certified is converted into data to be verified and / or error correction is performed on the data to be verified. The conversion method used in the first conversion procedure is changed every predetermined period,
In the accumulation procedure, the conversion method information of the conversion method used in the first conversion procedure is also included in the combination information and stored.
In the second conversion procedure, when converting the data to be verified to data to be verified, out of the combination information stored in the storage procedure, information for verification identification attached to the data to be verified The conversion method information combined with the identification information having the same content is extracted, and the data to be certified is converted into data to be verified by the conversion method based on the extracted conversion method information. The transmission method according to 7 or 8. The transmission data is an optical signal;
In the first conversion procedure, the electric signal obtained by photoelectrically converting the transmission data is subjected to arithmetic processing, the transmission data is subjected to arithmetic processing before photoelectric conversion, or the transmission data is calculated by combining both arithmetic processing. The transmission method according to claim 7, wherein the transmission data is converted into the verification data. The transmission data is an optical signal;
In the conversion procedure, a beat signal generated by performing an arithmetic process on an electrical signal obtained by photoelectrically converting a beat signal generated by the transmission data and reference light, and performing an arithmetic process and photoelectrically converting the transmission data before converting the transmission data. The transmission method according to any one of claims 7 to 9, wherein the transmission data is converted into the verification data by using a signal or calculating the transmission data by combining both arithmetic processes.   12. The transmission method according to claim 7, wherein in the first conversion procedure, only the transmission data having a predetermined identifier is converted into the data to be verified.

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