JP2004302710A - Ic tag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problem: in a conventional method wherein a tag attached to a commodity, recording data is practically used for stock management or the like of the commodity, it is not preferable in security that contents are uniformly disclosed when high-secrecy information is included, and inconvenience is generated when it is necessary to disclose the contents to a specific person if encrypting all data. <P>SOLUTION: In this IC tag, an encryption method for record data can be converted if necessary. An encryption method conversion device transmits a conversion command of the encryption method to the IC tag. A decryption device decrypting information from the IC tag. Thereby, the IC tag can disclose necessary information to the specific person, and secrecy of information can be maintained to the other persons. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an IC tag.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a tag recording information about a product is attached to the product, and the tag is used for inventory management of products, sales research, and the like (see Patent Document 1). At this time, the content of the read record data was disclosed, and it was worthwhile that anyone could use it.
[0003]
[Patent Document 1]
JP-A-2002-150241
[0004]
[Problems to be solved by the invention]
However, data recorded on the tag may include information related to privacy or the like. For example, if the price of the product is recorded on the tag, it is possible to know how much the purchaser of the product purchased the product, which may be a violation of privacy. Also, being able to easily identify expensive products could lead to crimes such as theft. It is not preferable from the viewpoint of security to uniformly disclose such information to be kept confidential.
[0005]
On the other hand, if all data is encrypted, there is a disadvantage when it is necessary to disclose it to a specific person.
[0006]
[Means for Solving the Problems]
In view of such circumstances, the present invention provides an IC tag capable of converting the encryption method of recording data as needed, an encryption method conversion device that transmits an encryption method conversion command to the IC tag, and an IC tag conversion method. The present invention proposes a decryption device for decrypting information.
[0007]
Here, the IC tag is attached to various products, and information on the products and the owner is recorded. It is assumed that this information is used by the owner of the product itself for management of the product, and is also acquired by, for example, a research company, and is used for marketing research and the like.
[0008]
As a prerequisite for a marketing survey, a research company sends an encryption mode conversion command to an IC tag using an encryption mode conversion device. If the information encrypted by the encryption method can be obtained from the IC tag, the research company can decrypt the encrypted information by the decryption device.
[0009]
At this time, the IC tag converts the encryption method in accordance with the command and notifies that effect. This allows the research company to provide information and pay a user of the IC tag for cooperating with the marketing research, thereby expanding the marketing research. On the other hand, the owner of the IC tag can provide information to a necessary person with security by performing encryption.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described. The present invention is not limited to these embodiments at all, and can be implemented in various modes without departing from the gist thereof.
[0011]
In the first embodiment, claims 1 and 8 will be mainly described.
[0012]
The second embodiment will mainly describe claim 2 and the like.
[0013]
The third embodiment will mainly describe claim 3 and the like.
[0014]
The fourth embodiment will mainly describe claim 4 and the like.
[0015]
The fifth embodiment will mainly describe claim 5 and the like.
[0016]
The sixth embodiment will mainly describe claim 6 and the like.
[0017]
The seventh embodiment will mainly describe claim 7 and the like.
<< First Embodiment >>
[0018]
<Embodiment 1: Overview>
[0019]
Embodiment 1 will be described.
[0020]
FIG. 1 shows an example of the concept of the present embodiment. The figure shows a scene in which the IC tag of the present invention is attached to clothes worn by the owner, and the information held by the IC tag is to be acquired by a decoding device installed on the street. .
[0021]
First, a question is asked by the decryption device to acquire information held by the IC tag ((1)). For example, the manufacturer, the product number, the price, the age of the owner, etc. of the clothes with the IC tag are applicable. If such information is obtained, it is possible to perform marketing analysis such as what age group and what product is preferred.
[0022]
In response, the IC tag returns encrypted encrypted response information ((2)). If it cannot be decrypted because it is encrypted, you cannot get an answer to the above question. Conventionally, it is easy to decipher the information held by an IC tag if it is normally read, but by encrypting it, it is necessary to hold the information without anyone else knowing it Can be.
[0023]
<Embodiment 1: Configuration>
[0024]
FIG. 2 shows an example of a functional block according to the present embodiment.
[0025]
The “IC tag” (0200) of the present embodiment shown in FIG. 2 includes a “response information acquisition unit” (0201), an “encryption unit” (0202), and an “encryption method conversion unit” (0203). Become.
[0026]
The “IC tag” (0200) is an electronic tag (tag) including an IC chip serving as a storage element, and can output information by operating an IC by radio waves transmitted in a non-contact manner. Things are known. It is considered that IC tags will be attached to almost all products in the future and used for distribution management, sales management, inventory management, and the like. Therefore, it is considered that almost all products purchased by ordinary people will be provided with an IC tag.
[0027]
The “response information acquisition unit” (0201) acquires response information. “Response information” refers to information to be transmitted in response to a question from the decryption device, and may also include other information such as IC tag identification information. Further, “acquisition” means that information matching the question is selected from information held in the IC tag. The obtained response information is passed to the encryption unit (0202).
It is assumed that the response information includes the product identification number, the sales route of the product, the price of the product, manufacturing management information such as the date of manufacture of the product, the purchaser identification information of the product, and the like. The information includes manufacturer identification information of the product, seller identification information of the product, material, material, component parts, expiration date, and country of manufacture of the product. In addition, it is assumed that the response information is recorded by the product manufacturer or the like, but there are other cases where the purchaser of the product can record the response information. In this case, the purchaser of the product records, for example, his / her personal information (age, gender, name, and the like), identification information, and the like.
[0028]
Note that the “decoding device” corresponds to an IC tag reader or the like. The decoding device will be described in detail in a seventh embodiment.
[0029]
The “encryption unit” (0202) performs a process for encrypting the response information acquired by the response information acquisition unit (0201) into encrypted response information. By performing the encryption, it is possible to prevent the contents of the encrypted response information from being decrypted by a third party. The encrypted response information may be sent to the decryption device.
[0030]
The “encryption method conversion unit” (0203) performs a process for changing the encryption method in the encryption unit (0202). The “processing for changing the encryption method” may include a case where the encryption method itself is converted and a case where the decryption key for decryption is converted.
[0031]
<Embodiment 1: Specific example>
[0032]
The functional block diagram shown in FIG. 3 is obtained by applying specific data to the above basic functional block diagram. This will be described below using this.
[0033]
The “IC tag” (0300) of the present embodiment shown in FIG. 3 includes a “response information acquisition unit” (0301), an “encryption unit” (0302), and an “encryption method conversion unit” (0303). Become.
[0034]
Now, as a question from the decryption device, a question of "product name and model number" was asked. The response information acquisition unit (0301) acquires “article name: one piece, model number: PK425” as response information to be sent in response thereto.
[0035]
Next, if necessary, processing for changing the encryption method is performed in the encryption method conversion unit (0303) (if the encryption method is already used, the change processing is performed). Is not done.). Here, for the description of the encryption method, a mirror method (encryption by inverting a character) and a substitution method (encryption by replacing a character with another character) are illustrated. For example, when the encryption method itself in the encryption unit (0302) is converted to the mirror method, the character of the response information is inverted and encrypted.
[0036]
Further, in order to convert a decryption key for decryption, for example, in the case of the substitution method, the conversion of the encryption method refers to a method of converting the original text by shifting a predetermined character. Then, the number of characters to be shifted becomes a decryption key. Specifically, when the original text of the original decryption key is “ABC”, if the character is encrypted by shifting the character backward by 10, the resulting character string becomes “KLM”. The decryption key here is “10”. Therefore, if this decryption key is converted to “5”, the encrypted character string becomes “FGH” for the original text “ABC”. As described above, the encryption method can be converted by converting the decryption key.
[0037]
Finally, the encryption unit (0302) encrypts the response information. Here, the scene where encryption is performed by the converted mirror method has been described.
[0038]
<Embodiment 1: Process flow>
[0039]
FIG. 4 illustrates an example of a processing flow in the first embodiment. The encryption method in the IC tag according to the present embodiment includes the following steps.
[0040]
First, a question is received from the decryption device (question receiving step S0401).
[0041]
Next, response information to be transmitted in response to the question is acquired (response information acquisition step S0402).
[0042]
Further, it is determined whether to convert the encryption method (encryption method conversion determination step S0403). If it is determined that conversion is not to be performed, the process proceeds to the last step (S0405) without passing through the next step (S0404).
[0043]
If it is determined in the encryption method conversion determination step (S0403) that the data is to be converted, processing for changing the encryption method is performed (encryption method conversion step S0404).
[0044]
Finally, a process for encrypting the response information acquired in the response information acquisition step (S0402) to obtain encrypted response information is performed (encryption step S0405).
[0045]
The above processing can be executed by a program to be executed by a computer, and this program can be recorded on a recording medium readable by the computer. (Similar throughout this specification.)
[0046]
<Embodiment 1: Effect>
[0047]
ADVANTAGE OF THE INVENTION According to the IC tag of this invention, it can prevent that information is recognized by a third party by encrypting the information which needs security protection. Also, by changing the encryption method at this time, a specific person who may disclose the information is encrypted with an encryption method that can be decrypted by the other party, and the other person is in a state where it can not be decrypted, Sex can be maintained. In other words, it can be said that the invention is highly useful because it can provide necessary information to a specific person with security while ensuring security.
<< Embodiment 2 >>
[0048]
<Embodiment 2: Overview>
[0049]
Embodiment 2 will be described. In the present embodiment, the IC tag is characterized by receiving a conversion command of an encryption method from the outside.
[0050]
FIG. 5 shows an example of the concept of the present embodiment. FIG. 5 shows a case where the IC tag receives a conversion command of the encryption system from the research company A. If the IC tag converts the encryption method according to the encryption method conversion instruction from Company A, Company A can decrypt the encrypted response information encrypted by the encryption method. Company B will not be able to decipher it.
[0051]
<Embodiment 2: Configuration>
[0052]
FIG. 6 shows an example of a functional block according to the present embodiment.
[0053]
The “IC tag” (0600) of the present embodiment illustrated in FIG. 6 includes a “response information acquisition unit” (0601), an “encryption unit” (0602), and an “encryption method conversion unit” (0603). Further, it comprises an "encryption method conversion command receiving unit" (0604).
[0054]
The “encryption method conversion command receiving unit” (0604) receives the encryption method conversion command. The “encryption method conversion instruction” is an instruction for operating the encryption method conversion unit (0603) to change the encryption method. For example, in the above example, an instruction such as “conversion from the substitution method to the mirror method” is applicable. The transmission source of the encryption method conversion command is assumed to be a research company or the like who wants to decode the response information for use in marketing research and the like. In addition, in order to prevent others from knowing the information, the IC tag owner may use an encryption conversion device or the like to transmit an encryption method conversion command and convert the encryption method. .
[0055]
The received encryption method conversion command is passed to the encryption method conversion unit (0603).
[0056]
<Embodiment 2: Process flow>
[0057]
FIG. 7 illustrates an example of a processing flow according to the second embodiment. The encryption method in the IC tag according to the present embodiment includes the following steps.
[0058]
First, a question is received from the decryption device (question receiving step S0701).
[0059]
Next, response information to be sent in response to the question is acquired (response information acquisition step S0702).
[0060]
Further, an encryption system conversion command is received (encryption system conversion command reception step S0703).
[0061]
Next, processing for changing the encryption method is performed according to the encryption method conversion command received in the encryption method conversion command receiving step (S0703) (encryption method conversion step S0704).
[0062]
Finally, a process for encrypting the response information acquired in the response information acquisition step (S0702) to obtain encrypted response information is performed (encryption step S0705).
[0063]
<Embodiment 2: Effect>
[0064]
The IC tag of the present invention can receive an encryption system conversion command from the outside and convert the encryption system accordingly. Since the conversion of the encryption method can be directly requested for the IC tag, an external third party such as a research company can be connected to a new business opportunity, which is effective.
<< Embodiment 3 >>
[0065]
<Embodiment 3: Overview>
[0066]
Embodiment 3 will be described. In the present embodiment, the IC tag is characterized in that the encryption method conversion instruction includes information for specifying the encryption method.
[0067]
<Embodiment 3: Configuration>
[0068]
FIG. 8 shows an example of a functional block according to the present embodiment.
[0069]
The “IC tag” (0800) of the present embodiment illustrated in FIG. 8 includes a “response information acquisition unit” (0801), an “encryption unit” (0802), an “encryption method conversion unit” (0803), It is composed of an “encryption method conversion command receiving unit” (0804) and a “encryption method specific information acquisition unit” (0805).
[0070]
The “encryption method identification information acquiring unit” (0805) acquires the encryption method identification information from the encryption method conversion instruction received by the encryption method conversion instruction receiving unit (0804). The “encryption method specifying information” is information for specifying an encryption method to be converted by an encryption method conversion command. Further, information about the transmission source of the encryption method conversion command may be included. For example, in the above example, information such as "encryption method to be converted: mirror method, transmission source: company A" or the like corresponds. Here, the encryption method specifying information is information for specifying the encryption method. For example, if the information is for identifying the encryption method, it may be a simple code, a numerical value, or the like. The information for specifying the encryption method may be a program for encryption itself.
[0071]
The obtained encryption method specifying information is passed to the encryption method conversion unit (0803). The encryption method conversion unit may determine that the encryption method is not to be converted from the received encryption method identification information. For example, when the encryption method cannot be specified by the encrypted information specifying information, the encryption method need not be converted.
[0072]
<Embodiment 3: Process flow>
[0073]
FIG. 9 illustrates an example of a processing flow in the third embodiment. The encryption method in the IC tag according to the present embodiment includes the following steps.
[0074]
First, a question is received from the decryption device (question receiving step S0901).
[0075]
Next, response information to be sent in response to the question is obtained (response information obtaining step S0902).
[0076]
Further, an encryption method conversion command is received (encryption method conversion command receiving step S0903).
[0077]
Next, the encryption method conversion command received in the encryption method conversion command receiving step (S0903) receives the encryption method specification information, which is information for specifying the encryption method to be converted by the encryption method conversion command. (Encryption method specifying information acquisition step S0904).
[0078]
Further, processing for changing the encryption method is performed according to the encryption method identification information acquired in the encryption method identification information acquisition step (S0904) (encryption method conversion step S0905).
[0079]
Finally, a process for encrypting the response information acquired in the response information acquisition step (S0902) to obtain encrypted response information is performed (encryption step S0906).
[0080]
<Embodiment 3: Effect>
[0081]
The IC tag of the present invention can acquire the encryption system identification information from the encryption system conversion command received from the outside and convert the encryption system accordingly. As a result, the IC tag can determine whether or not to convert the encryption method, so that security can be ensured and information can be provided with peace of mind.
<< Embodiment 4 >>
[0082]
<Embodiment 4: Overview>
[0083]
Embodiment 4 will be described. In the present embodiment, the IC tag is characterized by notifying that the encryption system has been converted.
[0084]
FIG. 10 shows an example of the concept of the present embodiment. FIG. 10 shows a case where the IC tag receives a conversion command of the encryption method from the research company A. When the IC tag converts the encryption method in accordance with the encryption method conversion instruction from the company A, the IC tag transmits a code for transmission to the company A to notify that the conversion has been performed. It sends out the conversion information of the conversion method. The encryption system converted notification information includes identification information of the IC tag and information indicating that the encryption system has been converted. The transmitted information reaches not only the IC tag itself but also the target company A or the like through the interposition of another transmission device or the like.
[0085]
At this time, if encryption is performed using the method specified by Company A, Company A can decrypt the encrypted response information, and Company A can use the data for marketing research and the like. Can be. On the other hand, the company A can identify the information provider to which the information is transmitted by receiving the notification information indicating that the encryption method has been converted. It is possible to pay the information provider a reward for providing the information, and to request the information provider to cooperate with the further provision of the information, thereby expanding the marketing survey.
[0086]
<Embodiment 4: Configuration>
[0087]
FIG. 11 shows an example of a functional block according to the present embodiment.
[0088]
The “IC tag” (1100) of the present embodiment shown in FIG. 11 includes a “response information acquisition unit” (1101), an “encryption unit” (1102), and an “encryption method conversion unit” (1103). “Encryption scheme conversion command receiving section” (1104), “Encryption scheme specific information acquisition section” (1105), “Encryption scheme conversion information acquisition section” (1106), and “IC tag identification information” Holder ”(1107) and“ Encryption method converted notification information sending unit ”(1108).
[0089]
The “encryption method converted information acquisition unit” (1106) acquires the encryption method converted information. “Encryption method converted information” is information indicating that the encryption method has been converted by the encryption method conversion unit (1103). In the example illustrated in FIG. 10, it is indicated that the conversion has been performed by setting the converted information of the encryption method to “converted”.
[0090]
The “IC tag identification information holding unit” (1107) holds IC tag identification information. “IC tag identification information” is information for uniquely identifying itself. In the example shown in FIG. 10, the IC tag identification information is indicated as “ID072”.
[0091]
The “encryption scheme converted notification information sending section” (1108) sends the encryption scheme converted notification information. The “encrypted-system-converted notification information” includes the encrypted-system-converted information acquired by the encrypted-system-converted information acquisition unit (1106) and the IC held in the IC tag identification information holding unit (1107). This is information associated with tag identification information. The transmission destination of the encryption scheme converted notification information corresponds to the transmission source of the encryption scheme conversion command. By notifying the sender of the encryption method conversion instruction that the encryption conversion has been performed, the fact that the encrypted response information held by the IC tag can be decrypted can be notified, and the price of providing the response information can be compensated. It is possible to obtain.
[0092]
<Embodiment 4: Process Flow>
[0093]
FIG. 12 illustrates an example of a processing flow in the fourth embodiment. The encryption method in the IC tag according to the present embodiment includes the following steps.
[0094]
First, an encryption method conversion instruction is received (encryption method conversion instruction receiving step S1201).
[0095]
Further, processing for changing the encryption method is performed according to the encryption method conversion command (encryption method conversion step S1202).
[0096]
Next, in the encryption method conversion step (S1202), encryption method converted information is obtained (encryption method converted information obtaining step S1203).
[0097]
Lastly, the encryption format converted information obtained in the encryption format converted information acquisition step (S1203) and the encryption format converted notification information, which is information that associates the IC tag identification information, are transmitted (encryption format conversion information). Transmitted converted notification information step S1204).
[0098]
<Embodiment 4: Effect>
[0099]
When the IC tag of the present invention converts the encryption method in accordance with the encryption method conversion command received from the outside, it is possible to transmit the fact as the encryption method converted notification information. This notifies the research company, etc., which is the transmission source of the encryption method conversion instruction, that the encryption conversion has been performed, thereby notifying that the encryption response information held by the IC tag can be decrypted, and responding. It becomes possible to obtain a price for providing the information.
[0100]
By paying the information provider a reward for providing the information, the research company can request further cooperation in providing the information, which can be useful for expanding the marketing survey.
<< Embodiment 5 >>
[0101]
<Embodiment 5: Overview>
[0102]
Embodiment 5 will be described. In the present embodiment, the encryption system conversion device transmits an encryption system conversion command.
[0103]
FIG. 13 shows an example of the concept of the present embodiment. FIG. 13 shows a state in which an encryption system converter is installed in a home closet. Here, IC tags are attached to clothes, bags, and shoes. By transmitting the encryption method conversion command from the encryption method conversion device, the encryption method of the IC tag is converted. Since the IC tag may include highly confidential information such as personal information, the IC tag owner may need to convert the encryption method. At this time, it is convenient to use the encryption system conversion device of the present embodiment in order to secure the security by encrypting the information inside the IC tag.
[0104]
<Embodiment 5: Configuration>
[0105]
FIG. 14 shows an example of a functional block according to the present embodiment.
[0106]
The “encryption system conversion device” (1400) of the present embodiment shown in FIG. 14 includes an “encryption system conversion command transmission unit” (1401). Here, the IC tag of the above-described second embodiment is used for description. The “IC tag” (1410) includes a “response information acquisition section” (1411), an “encryption section” (1412), an “encryption scheme conversion section” (1413), and an “encryption scheme conversion command receiving section”. (1414).
[0107]
The “encryption method conversion command transmission unit” (1401) performs processing for transmitting an encryption method conversion command to an IC tag. The transmission may be performed based on a process such as a button operation, for example, or may be performed every predetermined time.
[0108]
It is assumed that the encryption system converter owns and uses the encryption system converter itself in order to convert the encryption system of the information held in the IC tag. In addition, for example, an encryption system conversion device may be installed in order to transmit an encryption system conversion command so that a client such as a research company can convert to an encryption system that can be decrypted. In the example of FIG. 13, an example of installation in a closet is shown, but in addition to the above, it is installed in any place where a refrigerator, a chest of drawers, a cupboard, a file locker, a desk, a safe, and the like, money, bills, and the like are managed. In some cases.
[0109]
On the other hand, in the IC tag, the encryption system conversion command is received by the encryption system conversion command receiving unit (1414), and the encryption system is converted by the encryption system conversion unit (1413).
[0110]
<Embodiment 5: Effect>
[0111]
The encryption system conversion device of the present invention transmits an encryption system conversion command to an IC tag. If the IC tag converts the encryption method in accordance with the above, the encrypted response information cannot be decrypted by other encryption methods, so that the information held by the IC tag is concealed by the encryption method conversion device. Sex can be maintained.
[0112]
When the owner of the IC tag converts the encryption method using the encryption method conversion device, the information can be encrypted and kept secret from others. For example, even when a bag with an IC tag is stolen, there is an advantage that the content of information recorded on the IC tag can be kept confidential.
<< Embodiment 6 >>
[0113]
<Embodiment 6: Overview>
[0114]
Embodiment 6 will be described. The present embodiment is an encryption system conversion device characterized in that encryption system converted notification information sent from an IC tag is output in association with user identification information for identifying a user.
[0115]
<Embodiment 6: Configuration>
[0116]
FIG. 15 shows an example of a functional block according to the present embodiment.
[0117]
The “encryption system conversion device” (1500) of this embodiment shown in FIG. 15 includes an “encryption system conversion command transmission unit” (1501), a “user identification information holding unit” (1502), and an “encryption system And a "user information output unit" (1504). Here, the IC tag of the above-described fourth embodiment is used for description. The “IC tag” (1510) includes a “response information acquisition unit” (1511), an “encryption unit” (1512), an “encryption system conversion unit” (1513), and an “encryption system conversion command receiving unit”. (1514), “encryption method specific information acquisition unit” (1515), “encryption method converted information acquisition unit” (1516), “IC tag identification information holding unit” (1517), and “encryption method”. Conversion information notification section "(1518).
[0118]
The “user identification information holding unit” (1502) holds user identification information. “User identification information” is information for identifying the user of the encryption system conversion device.
[0119]
The “encryption scheme converted notification information receiving unit” (1503) receives the encryption scheme converted notification information sent from the IC tag. When the IC tag has converted the encryption method in accordance with the encryption method conversion command transmitted from the encryption conversion device, the encryption method conversion notification information is sent to the “encryption method conversion notification information transmission unit” (1518). ).
[0120]
The “user information output unit” (1504) outputs user information. The “user information” includes the user identification information held by the user identification information holding unit (1502) and the encryption system converted notification information received by the encryption system converted notification information receiving unit (1503). The associated information. The output destination is assumed to be a research company or the like. By receiving the user information, the research company can identify the user who has converted the encryption method of the IC tag, and can therefore give the user a reward for providing information.
[0121]
<Embodiment 6: Flow of processing>
[0122]
FIG. 16 illustrates an example of a processing flow according to the sixth embodiment. The flow of processing in the encryption system conversion device of the present embodiment includes the following steps. Note that the flow of processing in the IC tag of the above-described fourth embodiment is also used for description.
[0123]
First, the encryption system conversion device performs a process for transmitting an encryption system conversion command to the IC tag (encryption system conversion command transmission step S1601). This is processed in the IC tag encryption method conversion command receiving step (S1611).
[0124]
Next, the IC tag receives the encryption system conversion command (encryption system conversion command reception step S1611).
[0125]
Further, the IC tag performs a process for changing the encryption system according to the encryption system conversion command (encryption system conversion step S1612).
[0126]
Next, the IC tag acquires encryption system converted information which is information indicating that the encryption system has been converted in the encryption system conversion step (S1612) (encryption system converted information acquisition step S1613).
[0127]
Next, the IC tag sends out the encryption system converted notification information, which is information that associates the encryption system converted information acquired in the encryption system converted information acquisition step (S1613) with the IC tag identification information. (Encryption scheme converted notification information sending step S1614). This is processed in the encryption scheme conversion notification information receiving step (S1602) of the encryption scheme converter.
[0128]
On the other hand, the encryption system conversion device receives the encryption system converted notification information sent from the IC tag (encryption system converted notification information receiving step S1602).
[0129]
Lastly, the encryption system conversion device associates the retained user identification information with the encryption system converted notification information received in the encryption system converted notification information receiving step (S1602). Is output (user information output step S1603).
[0130]
<Embodiment 6: Effect>
[0131]
The encryption system conversion device of the present invention transmits an encryption system conversion command, and when the IC tag converts the encryption system in accordance with the command, it receives the fact as the encryption system converted notification information. By outputting this as user information to a research company or the like in association with the identification information of the user, the research company can recognize that the encrypted response information held by the IC tag can be decrypted. In addition, the user can obtain a price for providing the response information from the research company.
[0132]
By paying the information provider a reward for providing the information, the research company can request further cooperation in providing the information, which can be useful for expanding the marketing survey.
<< Embodiment 7 >>
[0133]
<Embodiment 7: Overview>
[0134]
Embodiment 7 will be described. In this embodiment, the decryption device decrypts a specific encryption method.
[0135]
<Embodiment 7: Configuration>
[0136]
FIG. 17 shows an example of a functional block according to the present embodiment.
[0137]
The “decryption device” (1700) of the present embodiment shown in FIG. 17 includes a “user information acquisition unit” (1701), a “user information holding unit” (1702), and an “encryption response information acquisition unit” (1703). And an "encryption response information decryption unit" (1704) and a "judgment unit" (1705).
[0138]
The “user information acquisition unit” (1701) acquires user information. The user information is output from the encryption system conversion device, and is information in which the user identification information is associated with the encryption system converted notification information.
[0139]
The “user information holding unit” (1702) holds the user information acquired by the user information acquiring unit (1701).
[0140]
The “encryption response information acquisition unit” (1703) acquires encryption response information in response to a query from the decryption device. For example, when the decryption device asks for "product name and model number" as a question, the response information corresponds to "product name: one piece, model number: PK425". This is encrypted by a specific encryption method to obtain encrypted response information.
[0141]
The “encryption response information decryption unit” (1704) decrypts the encrypted response information acquired by the encryption response information acquisition unit (1703). Decryption is performed by decrypting the encryption.
[0142]
The “determination unit” (1705) determines whether the response information decrypted by the encrypted response information decryption unit (1704) is associated with the user identification information stored in the user information storage unit (1702). . For example, this corresponds to comparing the identification information of the IC tag included in the response information with the user identification information and performing a determination process. If it can be determined that the IC tag matches the user who can decrypt the encrypted response information by transmitting the encryption method conversion command to the IC tag, the user can be paid for the same. It becomes.
[0143]
The “decryption device” (1700) is a device that asks an IC tag a question, obtains encrypted response information corresponding to the inquiry, decrypts the decrypted code, and is installed on a street or the like. It is assumed that an IC tag reader is capable of acquiring response information for a specific IC tag. In addition, the decryption device may be a server device of a research company or the like. Further, the decryption device may be realized by the same device as the encryption system conversion device.
[0144]
<Embodiment 7: Process flow>
[0145]
FIG. 18 illustrates an example of a processing flow in the seventh embodiment. The flow of processing in the decryption device of the present embodiment includes the following steps. Note that the processing flow in the above-described IC tag is also used for description.
[0146]
First, the decoding device transmits a question to the IC tag (question transmitting step S1801). This is processed in the IC tag question receiving step (S1811).
[0147]
Next, the decryption device acquires user information (user information acquisition step S1802).
[0148]
On the other hand, the IC tag receives the question transmitted from the decryption device (question receiving step S1811).
[0149]
Next, the IC tag acquires response information corresponding to the question acquired in the question receiving step (S1811) (response information acquiring step S1812).
[0150]
Further, the IC tag encrypts the response information acquired in the response information acquisition step (S1812) to obtain encrypted response information (encryption step S1813). This is processed in the encrypted response information acquisition step (S1803) of the decryption device.
[0151]
On the other hand, the decryption device obtains the encrypted response information encrypted in the IC tag encryption step (S1813) (encryption response information obtaining step S1803).
[0152]
Next, the decryption device decrypts the encrypted response information acquired in the encrypted response information acquisition step (S1803) (encrypted response information decryption step S1804).
[0153]
Finally, the decryption device determines whether the response information decrypted in the encrypted response information decryption step (S1804) is associated with the held user identification information (determination step S1805).
[0154]
<Embodiment 7: Effect>
[0155]
The decryption device of the present invention decrypts encrypted response information encrypted by a specific method. The owner of the IC tag can encrypt information related to privacy, while the receiver of the information can decrypt the information with a decryption device and receive the information. It is advantageous that necessary information can be transmitted only to a specific person, while the confidentiality of the information can be maintained to other persons.
[0156]
【The invention's effect】
As described above, according to the IC tag of the present invention, by encrypting information that needs security protection, it is possible to prevent a third party from recognizing the information. Also, by changing the encryption method at this time, a specific person who may disclose the information is encrypted with an encryption method that can be decrypted by the other party, and the other person is in a state where it can not be decrypted, Sex can be maintained. In other words, there is an effect that necessary information can be provided to a specific person with security while security is ensured.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram for explaining a first embodiment.
FIG. 2 is a functional block diagram for explaining the first embodiment;
FIG. 3 is a functional block diagram based on specific data for explaining the first embodiment;
FIG. 4 is a view for explaining the flow of processing according to the first embodiment;
FIG. 5 is a conceptual diagram illustrating Embodiment 2.
FIG. 6 is a functional block diagram for explaining a second embodiment;
FIG. 7 is a view for explaining the flow of processing according to the second embodiment;
FIG. 8 is a functional block diagram for explaining a third embodiment;
FIG. 9 is a view for explaining the flow of processing according to a third embodiment;
FIG. 10 is a conceptual diagram for explaining a fourth embodiment;
FIG. 11 is a functional block diagram for explaining a fourth embodiment;
FIG. 12 is a view for explaining the flow of processing according to a fourth embodiment;
FIG. 13 is a conceptual diagram for explaining Embodiment 5;
FIG. 14 is a functional block diagram for explaining a fifth embodiment;
FIG. 15 is a functional block diagram for explaining a sixth embodiment;
FIG. 16 is a view for explaining the flow of processing according to the sixth embodiment;
FIG. 17 is a functional block diagram for explaining a seventh embodiment;
FIG. 18 is a view for explaining the flow of processing according to the seventh embodiment.
[Explanation of symbols]
0200 IC tag
0201 Response information acquisition unit
[0202] Encryption unit
[0203] Encryption method conversion unit

Claims (8)

A response information acquisition unit that acquires response information that is information to be sent in response to a question from the decryption device,
An encryption unit for encrypting the response information acquired by the response information acquisition unit to obtain encrypted response information,
An encryption method conversion unit for changing an encryption method in the encryption unit,
An IC tag having: 2. The IC tag according to claim 1, further comprising: an encryption system conversion command receiving unit that receives an encryption system conversion command that is a command for operating the encryption system conversion unit to change an encryption system. An encryption method for obtaining encryption method identification information, which is information for specifying an encryption method to be converted by the encryption method conversion instruction, from the encryption method conversion instruction received by the encryption method conversion instruction receiving unit; The IC tag according to claim 1, further comprising a specific information acquisition unit. An encryption method converted information acquisition unit that obtains encryption method converted information that is information indicating that the encryption method has been converted in the encryption method conversion unit,
An IC tag identification information holding unit that holds IC tag identification information for uniquely identifying itself,
Encryption scheme converted notification information, which is information in which the encryption scheme converted information acquired by the encryption scheme converted information acquisition section is associated with the IC tag identification information held in the IC tag identification information holding section. The IC tag according to claim 3, further comprising: an encryption system converted notification information sending unit that sends the information. An encryption system conversion device having an encryption system conversion command transmission unit for transmitting an encryption system conversion command to the IC tag according to claim 1. A user identification information holding unit that holds user identification information that is information for identifying a user,
An encryption system converted notification information receiving unit that receives the encryption system converted notification information sent from the IC tag according to claim 4,
A user who outputs user information, which is information that associates the user identification information held by the user identification information holding unit with the encrypted system converted notification information received by the encrypted system converted notification information receiving unit. An information output unit;
The encryption system conversion device according to claim 5, comprising: A user information acquisition unit that acquires the user information;
A user information holding unit that holds the user information acquired by the user information acquisition unit,
An encrypted response information acquisition unit that acquires encrypted response information in response to a query from the decryption device;
An encryption response information decryption unit that decrypts the encryption response information acquired by the encryption response information acquisition unit,
A determination unit that determines whether the response information decrypted by the encrypted response information decryption unit is associated with the user identification information stored in the user information storage unit,
A decryption device having: A question receiving step of receiving a question from the decryption device;
Response information obtaining step of obtaining response information to be sent in response to the question,
An encryption method conversion determining step of determining whether to convert the encryption method;
In the encryption method conversion determination step, if the result of the determination to convert, an encryption method conversion step of performing processing to change the encryption method,
An encryption step of performing a process for encrypting the response information obtained in the response information obtaining step to obtain encrypted response information;
An IC tag encryption method conversion method comprising:

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