JP4788596B2 - Authentication system - Google Patents

Description

  The present invention, for example, confirms the presence of each other by performing wireless transmission and reception periodically or irregularly between the wireless key and the main body side device, and the wireless key and the main body side device exceed a predetermined communication range. Alternatively, the present invention relates to an authentication system and its program used for an alarm device or the like that restricts the function of the main body side device or generates an alarm when the other party cannot be confirmed by exchanging ID information.

  In recent years, security systems have been put into practical use in which an operation lock of an electronic device such as a mobile phone or a personal computer is wirelessly controlled in consideration of security.

  As one form of such a security system, in order to prevent the mobile phone from being stolen, a user of the mobile phone possesses an identification signal transmitter in the form of a card, and the mobile phone and the identification signal transmitter are previously connected. There is a mobile phone that can be used when a predetermined identification code is communicated with each other and the identification code is confirmed by both parties (see, for example, Patent Document 1).

  In Patent Document 1 of such a bidirectional communication system by wireless, in an apparatus mounted on the main body side such as an electronic apparatus, an operation of periodically detecting a signal emitted from a portable device (hereinafter referred to as a wireless key) is continued. It was the composition to be done.

  Further, there are three modes: a search mode, an application mode, and an authentication mode that is an intermediate stage for shifting from the search mode to the application mode, and a configuration that enables operation of the electronic device in the application mode. In the search mode, the electronic device A configuration for restricting the operation is shown. The search mode and the application mode are identified by the radio field intensity.

  For example, when the signal strength is strong (the distance to the user with the wireless key is short), the electronic device can be used as the app mode, and when the signal strength is weak (the distance is long), the electronic device can be used as the search mode. To do.

  Moreover, regarding the wireless use frequency, as seen in Patent Document 2, there is an example relating to control for changing the wireless frequency to be used according to the interference situation.

In Patent Document 2, the search signal in which the vehicle-mounted device (corresponding to the main body side of the electronic device or the like in Patent Document 1) periodically sets the vehicle-mounted device ID and the response signal transmission frequency of the portable device to confirm the presence of the portable device. Is transmitted and a search signal in which the value of the transmission frequency of the response signal is changed according to the response (including no response) from the portable device is transmitted to avoid interference.
JP 2004-143806 A JP-A-2005-299305

  However, Patent Document 1 does not describe any usage method when using a plurality of wireless utilization frequencies to be used.

If the target is an in-vehicle device and a portable device, the range of a certain distance can be specified by determining the signal strength. It is done.

  On the other hand, when applied to mobile phones and wireless keys, for example, when there are many identical systems (for example, users are crowded at concert venues), judgment of signal strength alone is sufficient as a countermeasure against interference. That's not true.

  Patent Document 2 discloses switching the frequency used for communication as a countermeasure when there is interference between a plurality of devices. In addition to the vehicle-mounted device ID, frequency information when the mobile device responds is added to the search signal (Patent Document 1 and transmission / reception message in the authentication mode in the present invention) that the vehicle-mounted device transmits to the mobile device. The portable device returns a response at a frequency according to the added information.

  However, since the configuration is such that only the frequency of the signal at the time of response is changed, and the frequency of the search signal is not changed, it cannot be said that it is sufficient as a countermeasure against interference in the case where the interference in the search signal itself increases.

  The present invention solves the above-mentioned conventional problems, and the wireless key and the main unit side device confirm the mutual existence by performing radio transmission and reception periodically or irregularly. An authentication system that is resistant to frequency interference used in an alarm device that restricts the function of the main unit side device or generates an alarm when the communication range exceeds a predetermined communication range or when the other party cannot be confirmed by exchanging ID information The purpose is to provide the program.

  In portable devices and main devices operating in a plurality of different operation modes (search mode, authentication mode, etc.) that check each other's presence via wireless communication, the portable devices are less frequently used in the operation modes and cause interference. In the operation mode (second operation mode) that is frequently used and has high possibility of interference by exchanging communication messages in a specific operation mode (first operation mode) A transmission / reception frequency determination processing unit A for determining a communication frequency; and a communication frequency change processing unit A for changing a communication frequency, wherein the main device performs the second operation by exchanging communication messages in the first operation mode. A transmission / reception frequency determination processing unit B that determines the communication frequency of the mode and a communication frequency change processing unit B that changes the communication frequency, and the main device is mixed during communication in the first operation mode. Is detected, the transmission / reception frequency determination processing unit B is activated to exchange the message in which the communication frequency is set, and the frequency used in the second operation mode is The communication frequency change processing unit B is configured to change the transmission / reception frequency in the second operation mode, and the portable device communicates in the first operation mode. When the communication frequency is detected, the transition to the first operation mode is performed, and when the communication frequency designation information is included in a message exchanged in the first operation mode, the transmission / reception frequency determination processing unit A is activated to determine a frequency to be used in the second operation mode with the main device, and the communication frequency change processing unit A changes the transmission / reception frequency in the second operation mode. Configure It is intended.

  As a result, when there is interference in an operation mode (authentication mode, application mode, etc.) with high communication frequency and high possibility of interference, communication at a frequency different from the interference frequency can be performed. It can be used without restrictions on the operation of unnecessary electronic devices even in places where there are many sets of main unit (cell phone) and portable devices (card keys, etc.) at very close distances such as in halls. The convenience of use can be improved.

  According to the present invention, even in a concert hall where a plurality of authentication systems performing the same control are highly likely to be crowded, it is possible to suppress restriction of operation of the electronic device due to interference, and the convenience of using the electronic device can be reduced. Can be improved.

  In a first aspect of the present invention, there is provided a portable device and a main device operating in a plurality of different operation modes (search mode, authentication mode, etc.) for confirming each other's presence by wireless communication. An operation mode (second operation) that is frequently used and has a high possibility of interference by exchanging communication messages in a specific operation mode (first operation mode) that is less frequently used and less likely to cause interference. A transmission / reception frequency determination processing unit A that determines a communication frequency and a communication frequency change processing unit A that changes the communication frequency, and the main device exchanges communication messages in the first operation mode. The transmission / reception frequency determination processing unit B for determining the communication frequency of the second operation mode and the communication frequency change processing unit B for changing the communication frequency are provided, and the main device has the first operation mode. When interference is detected during the communication, the transition is made to the first operation mode, the transmission / reception frequency determination processing unit B is activated to exchange the telegram with the communication frequency set, and the second operation mode A frequency to be used is determined with the portable device, and the transmission frequency is changed by the communication frequency change processing unit B in the second operation mode. When interference is detected during communication in the operation mode, when the communication frequency designation information is included in a message exchanged in the first operation mode, the communication frequency designation information is included in the first operation mode. The transmission / reception frequency determination processing unit A is activated to determine a frequency to be used in the second operation mode with the main device, and the communication frequency change processing unit A transmits and receives the transmission / reception frequency in the second operation mode. Change Is an authentication system, which is configured as.

  As a result, when there is interference in communication in an operation mode with high communication frequency and high possibility of interference, communication at a frequency different from the interference frequency can be performed. It can be used without restrictions on unnecessary operation of electronic devices even in places where a large number of sets of telephones and mobile devices (card keys, etc.) exist at very close distances, and the convenience of using electronic devices is improved. Will be able to.

  A second invention is the authentication system according to the first invention, wherein communication frequency designation information used in the second operation mode is used as a message exchanged for confirmation of the other party in the first operation mode. An authentication system configured to include the portable device and the main device so as to perform communication at a frequency indicated by the communication frequency designation information that is finally determined when shifting to the second operation mode.

  As a result, the frequency can be set at the same time as the authentication while maintaining the security strength without increasing the number of new messages, thereby reducing the additional mounting of devices and reducing the traffic. Furthermore, a series of authentication processes can be continuously performed, and the time adjustment associated with the frequency change is not required between the two devices that are performing communication, and the process can be reduced.

3rd invention is the authentication system in any one of 2nd invention, Comprising: In the procedure for the other party confirmation in said 1st operation mode, the said portable machine or said main body which transmits a message | telegram first The communication frequency determination processing unit (communication frequency determination processing unit A) of the device adds the communication frequency designation information to the first message (first message) and transmits the first message. The communication frequency designation information added to the response message (referred to as the second message) to the message of the second message is confirmed, and the communication frequency information added to the second message is the frequency added to the first message. If the frequency is different but usable, the same transmission frequency designation information added to the second message is added to the next transmission message (third message) and transmitted. With possible communication frequency specification information And it transmits waiting for a response message (fourth message, and),
When the communication frequency information added to the fourth telegram is the same as the information transmitted by adding to the third telegram, the first operation mode is configured to shift to the first telegram. In the procedure for confirming the other party in the operation mode, the communication frequency determination processing unit (communication frequency determination processing unit B) of the main device or the portable device that first receives a message is the first operation. In the procedure for partner confirmation in the mode, when the frequency specified in the communication frequency designation information added to the received first telegram is available, the first telegram in the second telegram A response is made by adding the same communication frequency designation information as that added to the electronic message, and when it is not usable, a response is made by adding the usable communication frequency designation information to the second electronic message, and the following third Waiting for receipt of message When the frequency specified in the communication frequency designation information added to the received third telegram is available, the same communication frequency designation information as that added to the third telegram in the fourth telegram is used. It is an authentication system configured to respond by adding and shifting to the second operation mode.

  This makes it possible to specify the communication frequency not only from the main unit or mobile device that transmits first in the procedure for confirming the partner, but also from the main device or mobile device that performs reception first, expanding the applicability. Will be.

  4th invention is the authentication system in any one of 2nd-3rd invention, Comprising: The said communication frequency determination process part A is the said 1st in the procedure for the other party confirmation in said 1st operation mode. A plurality of frequencies determined to be usable as the communication frequency designation information to be added to one message are set and transmitted, and then the communication frequency designation information added to the second message received is the first frequency The communication frequency determination processing unit B is configured to shift to the second operation mode when the frequency is one of a plurality of frequencies set in a message, and the communication frequency determination processing unit B is a procedure for partner confirmation in the first operation mode. If there is an available frequency among the frequencies set in the communication frequency designation information added to the received first telegram, the second telegram is selected by selecting one of the available frequencies. Send it with as the communication frequency specifying information, an authentication system configured to shift to the second operation mode.

  Thereby, in addition to being able to specify the communication frequency in both the main body device and the portable device, it is possible to reduce the exchange of frequency determination, and it is possible to increase the applicability and the convenience.

  5th invention is an authentication system in any one of 1st-4th invention, Comprising: As the message | telegram exchanged for a partner confirmation in said 1st operation mode, said 2nd operation mode from said 2nd operation mode It is configured to include timing information for starting procedure execution for confirming the other party when shifting to one operation mode, and the portable device and the main device indicate the communication frequency designation information that is finally determined when shifting to the second operation mode. An authentication system configured to perform communication at a frequency.

  As a result, the timing for starting the second operation mode can be changed at the same time as the authentication while maintaining the security strength without increasing the number of new messages. Furthermore, a series of authentication processes can be continuously performed, and the time adjustment associated with the timing change is not required between the two devices that are performing communication, and the process can be reduced.

6th invention is an authentication system as described in 5th invention, Comprising: The said communication frequency determination process part A does not add the said timing information in the procedure for the other party confirmation in said 1st operation mode, or If the timing information is added to the first message when receiving the second message to which the timing information is added when the added first message is transmitted, it is added to the second message. Whether the timing information added is the same as the timing information added to the first telegram, and if it is different or if timing information is not added to the first telegram, The same timing information as that added to the second message is added to the message and transmitted, the fourth message is waited, and the timing information added to the fourth message is sent to the third message If the information is the same as the transmitted information, the main device or the mobile phone is configured to be able to shift to the second operation mode and receive a message first as a procedure for partner confirmation. The communication frequency determination processing unit B of the machine, in a message exchanged for partner confirmation in the first operation mode, sends a timing to the second message sent back after receiving the first message. If the information is added, the timing information is added. If the timing information is not added to the first message, the timing information is added and transmitted. The timing information is added to the first message. If not, it waits for the reception of the next third message, adds the timing information added to the received third message to the fourth message, and responds to the second message. Mo An authentication system configured to allow transition to de.

  As a result, the timing can be specified not only from the main body device or portable device that transmits first in the procedure for partner confirmation, but also from the main device or portable device that performs reception first, and the applicability is expanded. It will be.

  7th invention is the authentication system in any one of 1st-6th invention, Comprising: The said main body apparatus and the said portable machine are the other party with which each other was linked | related in said 2nd operation mode. An authentication system configured to determine that interference has occurred when a message for confirming the message cannot be exchanged.

  As a result, it is not necessary to provide a new process or procedure for the determination of interference, and an increase in the load on the devices constituting the system can be suppressed.

  An eighth invention is the authentication system according to any one of the first to seventh inventions, wherein in the second operation mode, the main device or the portable device communicates with each other by exchanging messages. An operation mode for identifying and confirming the other party (first authentication mode), and an operation mode for confirming the presence of the other party based on the signal strength of the signal from the other party (second authentication mode). The second operation that is determined in the first operation mode, wherein the communication frequency used in the first authentication mode is different from the communication frequency used in the second authentication mode. An authentication system configured such that a communication frequency of a mode is a communication frequency used in the first authentication mode.

  As a result, the communication signal in the second authentication mode, which does not cause a major failure even if interference occurs, interferes with communication in the first authentication mode in which failure (cannot confirm the other party) occurs if interference occurs. This can be avoided. In particular, in an authentication system in which a message as short as possible is exchanged for as long as possible for the purpose of suppressing battery consumption, and then confirmation (processing in the second authentication mode) is performed to identify the other party. Therefore, it is possible to greatly reduce the trouble caused by the interference in the second operation mode.

  The ninth invention is a program for causing a computer to realize at least a part of the authentication system of the first to eighth inventions. Since it is a program, at least a part of the present invention can be realized with simple hardware by cooperating hardware resources such as an electric / information device and a computer. In addition, the program can be distributed / updated and installed easily by recording on a recording medium or distributing the program using a communication line.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 5 shows an example of an authentication system to which the present invention is applied. In FIG. 5, 50 is a person carrying a portable device, 51 is a portable device such as a card key, and 52 is a main device such as a cellular phone. The portable device and the main device each include the authentication device shown in FIG.

  FIG. 2 shows an example of a frequency use configuration of the authentication system according to the first embodiment of the present invention. In FIG. 2, 20a and 20b indicate communication modes, and 21a and 21b indicate specific communication frequencies.

  FIG. 14 shows an example of a partial block diagram of the card KEY (portable device) 51 in the first embodiment of the present invention. In FIG. 14, 140 is a wireless communication processing unit A, 141 is a transmission / reception frequency change processing unit A, 142 is a transmission / reception frequency determination processing unit A, 143 is a first communication mode processing unit A, and 144 is a second communication mode processing unit. A.

  FIG. 15 shows an example of a partial block diagram of the mobile phone (main device) 52 in the first embodiment of the present invention. In FIG. 15, 150 is a wireless communication processing unit B, 151 is a transmission / reception frequency change processing unit B, 152 is a transmission / reception frequency determination processing unit B, 153 is a first communication mode processing unit B, and 154 is a second communication mode processing unit. B.

  FIG. 16 shows a structural example of a message related to the present invention used in the authentication system in the first and second embodiments of the present invention. In FIG. 16, 161 is an authentication request message including information for authentication such as portable device ID information (hereinafter referred to as an authentication request A message), 162 is an authentication response message including main device ID information, and 161a to 162a are synchronization signal code portions. , 161b to 162b are message type code parts indicating the types of messages, and 161c to 162c are message information codes for each message indicated by the message types.

  FIG. 17 shows an example of the configuration of a message in the first embodiment of the present invention. In FIG. 17, reference numeral 171 denotes an authentication request message according to the present invention (hereinafter referred to as an authentication request B message) including frequency designation information to be changed, and 172 denotes an authentication response message (hereinafter referred to as authentication response B message) according to the present invention including frequency designation information to be changed. ), 171b to 171b are message type code parts indicating the types of messages, and 171d to 172d are communication frequency designation information codes to be changed.

  FIG. 18 shows an example of a communication procedure (sequence) in the first embodiment of the present invention. In FIG. 18, 181a to 181c are frequency setting processes related to the present invention in the card KEY51, 182a to 182c are frequency setting processes related to the present invention in the mobile phone 52, and 183a to 183g are between the card KEY51 and the mobile phone 52. It is a transmission and reception message in

  The operation will be described with reference to FIGS. 2, 5, and 14 to 18. As a premise of the present embodiment, it is assumed that the exchange of ID information between the portable device and the main device is completed in advance and the information of the communication partner is held mutually. Further, a case where the portable device is a card key and the main device is a mobile phone, and the device that first transmits a message in the procedure for the authentication process is a portable device.

  The mobile phone (main device) 52 held by the user 50 can use the function only when the authentication card KEY (mobile device) 51 is within a certain distance and can be mutually authenticated by communication. It is. In the present embodiment, a case where the card KEY and the mobile phone are already operating in the application mode is shown as an example.

There are a plurality of usage modes depending on the purpose, and the allocation of the frequency used by each mode is determined in advance depending on the possibility of interference. As an example, in the first communication mode 20a (search mode / initial authentication mode / pairing mode / program (PG) download mode / maintenance mode for maintenance) for standby with low interference, searching for a partner, initial authentication, etc. Ch1 (426.1125 MHz band shown as 21a as a specific example) is a plurality of frequencies Ch2 to Ch4 (shown as 11b as a specific example) in the second communication mode 20b (application mode) where interference is expected to increase. 426.0375 MHz band / 426.0625 MHz band / 426.087 MHz band).

  In such a system, the card KEY 51 and the mobile phone 52 activate the second communication mode processing unit A 144 and the second communication mode processing unit B 145 when entering the application mode. The second communication mode processing unit A144 and the second communication mode processing unit B145 operate the transmission / reception frequency change processing unit A141 and the transmission / reception frequency change processing unit B141, respectively, and set the transmission / reception frequency to Ch2 (181a, 182a). , Process in app mode. In the application mode, messages are exchanged to confirm the existence of each other periodically or at a predetermined timing.

  In this embodiment, the card KEY 51 transmits an authentication request A message 161 to the mobile phone 52 (183a), waits for a reply (183b) of the authentication response A message 162 from the mobile phone 52, and receives the authentication response A message 162. To move to the next transmission timing. After receiving the authentication request A message 161 from the card KEY 51 (183a), the mobile phone 52 determines the content and confirms that it is a communication partner of the mobile phone 52, and returns an authentication response A message 162 (183b). The continuation of use of the mobile phone 52 is permitted.

  It is desirable that the portable device ID information 161c and the main device ID information 162c of the authentication request A message 161 and the authentication response A message 162 cannot be easily confirmed by encryption or the like. Further, here, for simplicity, it is assumed that the partner confirmation can be performed with one set of request message and response message, but the partner confirmation may be confirmed by exchanging a plurality of messages.

  In such an application mode, if the authentication request A message 161 transmitted by the card KEY51 does not reach the mobile phone 52 due to interference with a transmitted message in another similar system (183c), the mobile phone 51 receives a message. Since there is no reception, the second communication mode processing unit B155 shifts the processing to the first communication mode processing unit B153, and shifts to the first communication mode (initial authentication mode in the embodiment). The first communication mode processing unit B153 sets the frequency Ch1 of the initial authentication mode in the transmission / reception frequency change processing unit B151 (182b), and waits for a message from the card KEY51.

  On the other hand, in the second communication mode processing unit A145 of the card KEY51, the content of the authentication request A message 161 is not received in response to the transmission of the authentication request A message 161 (183c), or the contents are different. Then, the communication is recognized, and the processing is shifted to the first communication mode processing unit A143, and the mode is changed to the first communication mode.

  In the first communication mode processing unit A143, the frequency Ch1 of the initial authentication mode is set (181b) in the transmission / reception frequency change processing unit A141, and the transmission / reception frequency determination processing unit A142 is activated and used in the immediately preceding application mode. A frequency (frequency Ch3) different from the frequency (frequency Ch2) is determined, and is set in the authentication request B telegram 171 as communication frequency designation information 171d and transmitted (183d).

The mobile phone 52 that has received (183d) the authentication request B message 171 confirms the frequency set as the previous communication frequency designation information 171d, determines whether it can be used by activating the transmission / reception frequency determination processing unit B152, If it is determined that the communication response can be used, the same value is set as the communication frequency designation information 172d in the authentication response B message 172 and transmitted (183e), and then the frequency indicated by the communication frequency designation information 172d set in the authentication response B message 172 ( The frequency Ch2) is set in the transmission / reception frequency change processing unit B151 (182c), and the second communication mode processing unit B154 is activated to start processing in the second communication mode (application mode).

  On the other hand, when the card KEY51 receives the authentication response B message 172 (183e), the same content as the communication frequency specification information 171d set in the authentication request B message 171 is set as the communication frequency specification information 172d. The frequency (frequency Ch2) indicated by the communication frequency designation information 172d is set (181c) in the transmission / reception frequency change processing unit A141, and the second communication mode processing unit A144 is activated to start the second communication mode (application mode). Start processing.

  As a frequency determination method in the transmission / reception frequency determination processing unit A142 and the transmission / reception frequency determination processing unit B152, a frequency that can be set in hardware is determined in advance for each device or randomly. As a method of determining “predetermined”, a method of setting toggles in a predetermined order, such as Ch2 → Ch3 → Ch4 → Ch2... Can be considered. By making this order different for each device, it is possible to reduce the probability of re-interference with the changed frequency implemented in another authentication system that has made interference.

  In addition, the “random” decision method that can reduce the probability of re-interference with the changed frequency implemented in another interference authentication system is to generate a random number and divide by the number of hardware-configurable frequencies. A method of setting the frequency indicated by a numerical value of +1 may be considered. Specifically, in the case of the present embodiment (available frequencies are Ch2 to Ch4, 1 is Ch2, 2 is Ch3, and 3 is Ch4), the generated random number is 5 Then, too much divided by 3 is 1, and “too much +1” is 2, so Ch3.

  As a result, when there is interference in communication in an operation mode with high communication frequency and high possibility of interference, communication at a frequency different from the interference frequency can be performed. Even when there are many sets of telephones and mobile devices (card keys, etc.) at very close distances, they can be used continuously without any restrictions on the operation of unnecessary electronic devices. It can be improved.

  In addition, since the frequency information is included in the message used in normal authentication processing, it is not necessary to provide a new sequence procedure for determining interference, thereby suppressing an increase in the load on the devices constituting the system. Can do.

  In the first embodiment, a case is shown in which a transition to the application mode is made by exchanging a single message (the mobile phone accepts an authentication request B message from the card KEY and returns an authentication response B message). However, when it is desired to set a frequency different from that specified by the card KEY on the mobile phone side, an authentication response B message in which a frequency different from that specified by the card KEY is set is returned, and the authentication request B message is waited again. When the card KEY side receives an authentication response B message specifying a different frequency, the card KEY side can be configured to transmit an authentication request B message set with a frequency specified in the authentication response B message or a different frequency. .

  This makes it possible to specify the communication frequency not only from the main unit or mobile device that transmits first in the procedure for confirming the partner, but also from the main device or mobile device that performs reception first, expanding the applicability. Will be. Here, the authentication request / authentication response message is used as the message for setting the frequency to be changed. However, the message may be added to another message and used in the form of a message exchange sequence.

  In the first embodiment, an example is shown in which one frequency is designated by the authentication request B message. However, a plurality of frequencies may be designated. In that case, the authentication response B message responds by selecting one of the specified frequencies that can be set and responding, and if all of the specified frequencies are not possible, the process immediately shifts to processing that cannot be handled. it can. Thereby, in addition to being able to specify the communication frequency in both the main body device and the portable device, it is possible to reduce the exchange of frequency determination, and it is possible to increase the applicability and the convenience.

(Embodiment 2)
FIG. 19 shows an example of a partial block diagram constituting a card KEY (portable device) 51 according to the second embodiment of the present invention. In FIG. 19, reference numeral 191 denotes a process start timing information holding unit A for starting the process of the first communication mode.

  FIG. 20 shows an example of a partial block diagram of the mobile phone (main device) 52 according to the second embodiment of the present invention. In FIG. 15, reference numeral 201 denotes a process start timing information holding unit B for starting the process of the first communication mode.

  FIG. 21 shows an example of the configuration of a message in the second embodiment of the present invention. In FIG. 21, 211 is an authentication request message (hereinafter, “authentication request C message”) including timing information for starting processing such as a sequence for change, and 212 is a timing for starting processing such as a sequence for change. An authentication response message (hereinafter referred to as an authentication response C message) of the present invention including information, 211b to 211b are message type code parts indicating the type of message, and 211d to 212d are timing information codes to be changed.

  FIG. 22 shows an example of a communication procedure (sequence) in the second embodiment of the present invention. In FIG. 22, 221a to 221c are frequency setting processes related to the present invention in the card KEY51, 222a to 222c are frequency setting processes related to the present invention in the mobile phone 52, and 223a to 223h are between the card KEY51 and the mobile phone 52. It is a transmission and reception message in

  The operation will be described with reference to FIGS. 2, 5, 16 to 17, and 19 to 22. As a premise of the present embodiment, it is assumed that the exchange of ID information between the portable device and the main device is completed in advance and the information of the communication partner is held mutually. Further, a case where the portable device is a card key and the main device is a mobile phone, and the device that first transmits a message in the procedure for the authentication process is a portable device.

  The mobile phone (main device) 52 held by the user 50 can use the function only when the authentication card KEY (mobile device) 51 is within a certain distance and can be mutually authenticated by communication. It is. In the present embodiment, a case where the card KEY and the mobile phone are already operating in the application mode is shown as an example.

  There are a plurality of usage modes depending on the purpose, and the allocation of the frequency used by each mode is determined in advance depending on the possibility of interference. As an example, in the first communication mode 20a (search mode / initial authentication mode / pairing mode / program (PG) download mode / maintenance mode for maintenance) for standby with low interference, searching for a partner, initial authentication, etc. Ch1 (426.1125 MHz band shown as 21a as a specific example) is a plurality of frequencies Ch2 to Ch4 (shown as 11b as a specific example) in the second communication mode 20b (application mode) where interference is expected to increase. 426.0375 MHz band / 426.0625 MHz band / 426.087 MHz band).

In the second embodiment, a case is described in which the mobile phone 52 is configured to trigger the timing information setting instead of the card KEY51. As shown in the first embodiment, the card KEY 51 can be configured to trigger.

  In such a system, the first communication mode processing unit A143 of the card KEY51 transmits an authentication request A message 161 to the mobile phone 52 as an authentication operation in the initial authentication mode before entering the application mode (223a), and an authentication response message Wait for. In the first communication mode processing unit B153 of the mobile phone 52 that has received (223a) the authentication request A message 161, the initial authentication set in the processing start timing information holding unit A191 that is predetermined or arbitrarily determined by the user. The authentication operation start timing information in the mode (for example, WAIT time information) is set in the response message (222b), returned as an authentication response C message 212 (223b), and the next authentication request C message 212 is awaited.

  The first communication mode processing unit A143 that has received (223c) the authentication response C message 212 can check and respond to the timing information 212d set in the authentication response C message 212. If there is, the authentication request C telegram 211 in which the received timing information is set (212d) is generated and transmitted (223c).

  Upon receiving (223c) the authentication request C message 211, the first communication mode processing unit B153 confirms the timing information 211d set in the message, and if it is the same as the transmitted timing information 212d The authentication response C message 212 is transmitted again (223d), the timing information 212d in the authentication response C message 212 is set in the processing start timing information holding unit B201, and the mode is changed to the application mode (222b). Upon receiving (223d) the authentication response C message 212, the first communication mode processing unit A143 sets the timing information 221d set in the message to the processing start timing information holding unit A191, and transitions to the application mode (221b). )

  In the application mode, messages are exchanged to confirm the existence of each other periodically or at a predetermined timing. In this embodiment, the card KEY 51 transmits the authentication request A message 161 to the mobile phone 52 (223e), waits for a reply (223f) of the authentication response A message 162 from the mobile phone 52, and receives the authentication response A message 162. To move to the next transmission timing.

  After receiving the authentication request A message 161 from the card KEY 51 (223e), the mobile phone 52 determines the content and confirms that it is the communication partner of the mobile phone 52, and returns an authentication response A message 162 (223f). The continuation of use of the mobile phone 52 is permitted. It is desirable that the portable device ID information 161c and the main device ID information 162c of the authentication request A message 161 and the authentication response A message 162 cannot be easily confirmed by encryption or the like.

  Further, here, for simplicity, it is assumed that the partner confirmation can be performed with one set of request message and response message, but the partner confirmation may be confirmed by exchanging a plurality of messages.

  In such an application mode, if the authentication request A message 161 transmitted by the card KEY51 is not delivered to the mobile phone 52 due to interference with a transmitted message in another similar system (223g), the mobile phone 51 receives a message. Since there is no reception, the second communication mode processing unit B155 shifts the processing to the first communication mode processing unit B153, and shifts to the first communication mode (initial authentication mode in the embodiment).

  The first communication mode processing unit B153 sets the frequency Ch1 of the initial authentication mode in the transmission / reception frequency change processing unit B151 (222c), and waits for elapse or timing of the time set in the processing start timing information holding unit B201. (222d) Start waiting for a message from the card KEY51 (start processing in the first communication mode).

  On the other hand, in the second communication mode processing unit A145 of the card KEY51, the content of the authentication request A message 161 is not received in response to the transmission of the authentication request A message 161 (223g), or the contents are different. Then, the communication is recognized, and the processing is shifted to the first communication mode processing unit A143, and the mode is changed to the first communication mode.

  The first communication mode processing unit A143 sets the frequency Ch1 of the initial authentication mode in the transmission / reception frequency change processing unit A141 (221c), and waits for the elapse or timing of the time set in the processing start timing information holding unit A191. (221d) The transmission / reception frequency determination processing unit A142 is activated to determine a frequency (frequency Ch3) different from the frequency (frequency Ch2) used in the immediately preceding application mode, and the authentication request B message as communication frequency designation information 171d The processing described in the first embodiment after detecting interference that is set to 171 and transmitted (223h) is started.

  In the second embodiment, the timing based on the timing information is waited after the frequency is changed by the first communication mode processing unit. However, the frequency may be changed after the timing elapses. Good.

  In the second embodiment, the mobile phone 52, not the card key 51, triggers the timing information setting trigger. However, the card key 51 may be configured to trigger. In that case, the timing information can be exchanged in each exchange of the authentication request C message and the authentication response C message.

  As a result, the timing for starting the second operation mode can be changed at the same time as the authentication while maintaining the security strength without increasing the number of new messages. Furthermore, a series of authentication processes can be continuously performed, and the time adjustment associated with the timing change is not required between the two devices that are performing communication, and the process can be reduced.

  Furthermore, since the message used in the normal authentication process has timing information, it is not necessary to provide a new sequence procedure as a judgment of interference, thereby suppressing an increase in the load on the devices constituting the system. it can.

(Embodiment 3)
FIG. 3 shows an example of a frequency use configuration of the authentication system in the third and eighth embodiments of the present invention. In FIG. 3, 30a, 30b, and 30c indicate communication modes, and 31a, 31b, and 31c indicate specific communication frequencies.

  FIG. 23 shows an example of a communication procedure (sequence) in the third embodiment of the present invention. In FIG. 23, reference numerals 231a to 231c denote frequency setting processes related to the present invention in the card KEY51, 232a to 232c denote frequency setting processes related to the present invention in the mobile phone 52, and 233a to 233j denote between the card KEY51 and the mobile phone 52. 234a and 234c are sequences in the first authentication mode, and 234b is a sequence in the second authentication mode.

  The operation will be described with reference to FIGS. 3, 5, 14 to 16, and 23. As a premise of the present embodiment, it is assumed that the exchange of ID information between the portable device and the main device is completed in advance and the information of the communication partner is held mutually. Further, a case where the portable device is a card key and the main device is a mobile phone, and the device that first transmits a message in the procedure for the authentication process is a portable device.

  In the present embodiment, the normal authentication mode 20b of FIG. 2 where there is a high possibility of interference, and further, it is necessary to exchange messages for identifying and confirming each other's ID information and the like. The partner confirmation authentication mode (first authentication mode) 30b that is greatly influenced by the presence check authentication mode (second authentication mode) that only confirms reception of radio waves of a predetermined strength or less and that is less affected by interference. ) Set to 30c separately. In the present embodiment, in the second authentication mode, only the presence / absence (including strength) of radio waves is confirmed, and the contents of the message are not confirmed.

  The mobile phone (main device) 52 held by the user 50 can use the function only when the authentication card KEY (mobile device) 51 is within a certain distance and can be mutually authenticated by communication. It is. In the present embodiment, a case where the card KEY and the mobile phone are already operating in the application mode is shown as an example.

  In such a system, the card KEY 51 and the mobile phone 52 activate the second communication mode processing unit A 144 and the second communication mode processing unit B 145 when entering the application mode. The second communication mode processing unit A144 and the second communication mode processing unit B145 operate the transmission / reception frequency change processing unit A141 and the transmission / reception frequency change processing unit B141, respectively, and set the transmission / reception frequency to Ch2 (231a, 232a). , Process in app mode.

  In the application mode, the processing in the first authentication mode and the second authentication mode is performed periodically or at a predetermined timing. As processing in the first authentication mode, for example, processing for confirming each other by exchanging authentication request A message 161 and authentication response A message 162 (233a, 233b) is performed. When the sequence (234a) of the first authentication mode is completed, the second communication mode processing unit A144 and the second communication mode processing unit B145 are a transmission / reception frequency change processing unit A141 and a transmission / reception frequency change processing unit B141, respectively. And the transmission / reception frequency is set to Ch4 used in the second authentication mode (231b, 232b), and the second authentication mode sequence (234b) is performed.

  As the second authentication mode, the card KEY51 is periodically or determined to be a short presence notification message such as a message consisting of only a synchronization signal or a message consisting of a synchronization signal and simple ID information of about 1 byte. It is assumed that transmission is performed at timing (233c, 233d, 233e), and that the mobile phone confirms that the signal is received. When the series of the second authentication mode sequence (234b) is completed, the second communication mode processing unit A144 and the second communication mode processing unit B145 respectively transmit / receive frequency change processing unit A141 and transmission / reception frequency change processing. The part B141 is operated to set the transmission / reception frequency to Ch2 used in the first authentication mode (231b, 232b), and the first authentication mode sequence (234c) is performed.

  As a result, the communication signal in the second authentication mode, which does not cause a major failure even if interference occurs, interferes with communication in the first authentication mode in which failure (cannot confirm the other party) occurs if interference occurs. You can avoid that. In particular, in an authentication system in which a message as short as possible is exchanged for as long as possible for the purpose of suppressing battery consumption, and then confirmation (processing in the second authentication mode) is performed to identify the other party. Therefore, it is possible to greatly reduce the trouble caused by the interference in the second operation mode.

(Embodiment 4)
FIG. 1 shows an example of a frequency use configuration of an authentication system according to the fourth embodiment of the present invention. In FIG. 1, 10a and 10b indicate communication modes, and 11a and 11b indicate specific communication frequencies.

  FIG. 4 shows an example of a partial block diagram constituting an authentication apparatus according to the fourth embodiment of the present invention. In FIG. 4, 41 is an antenna, 42 is a transmission unit, 43 is a reception unit, 40 is an authentication control processing unit, 421 is a transmission frequency change processing unit, and 431 is a reception frequency change processing unit.

  FIG. 6 shows an example of a communication procedure (sequence) in the fourth embodiment of the present invention.

  In FIG. 6, 61a and 61b are frequency setting processes related to the present invention in the portable device 51, 62a and 62b are frequency setting processes related to the present invention in the main device 52, 63 is a sequence in the search mode (sequence A), 64 is a first sequence in the authentication mode (sequence B), 65 is a second sequence in the authentication mode (sequence C), 63a and 63b are transmission / reception messages in search mode, and 64a and 64b are transmission / reception in sequence B Telegrams 65a and 65b are transmission / reception telegrams in sequence C.

  The communication procedure (sequence) shown in FIG. 6 is a case where, in the authentication system to which the present embodiment is applied, an operation as an application is performed in which the other party is specified and then the other party is confirmed and authenticated. It is a communication procedure (sequence) when it does not occur.

  FIG. 7 shows an example of a communication procedure (sequence) in the fourth embodiment of the present invention.

  In FIG. 7, 71a and 71b are frequency setting processes related to the present invention in the portable device 51, 72a and 72b are frequency setting processes related to the present invention in the main device 52, and 73 is a second sequence (sequence) in the authentication mode. C), 74 is a first sequence (sequence Be) when mutual authentication is not successful in the authentication mode, 75 is a sequence in search mode (sequence A), and 74a, 74b are transmission / reception messages in sequence C. is there.

  The communication procedure shown in FIG. 7 is a communication procedure when interference occurs in the authentication system to which the present invention is applied in the case where an operation is performed in which the other party is specified and then the other party is continuously confirmed and authenticated.

  FIG. 8 shows an example of a message structure transmitted and received in the search mode according to the fourth embodiment of the present invention. In FIG. 8A, 81 is a search portable device ID message, and in FIG. 8B, 82 is a search main unit ID message. 81a and 82a are synchronization signals for receiving messages, 81b is portable device ID information, 82b is main device ID information, 81c is designated frequency information from the portable device, and 82c is frequency response information from the main device.

  The operation will be described with reference to FIGS. 1 and 4 to 8. As a premise of the present embodiment, it is assumed that the exchange of ID information between the portable device and the main device is completed in advance and the information of the communication partner is held mutually. Further, a case where the portable device is a card key and the main device is a mobile phone, and the device that first transmits a message in the procedure for the authentication process is a portable device. The authentication mode shown in the fourth embodiment corresponds to the initial authentication mode and the application mode shown in the first to third embodiments.

  The mobile phone (main device) 52 held by the user 50 can use the function only when the authentication card KEY (mobile device) 51 is within a certain distance and can be mutually authenticated by communication. It is.

  The mobile phone 52 and the card KEY 51 each receive and transmit a signal having a plurality of frequencies, a transmission frequency change processing unit 421 that changes the setting of the transmission frequency in the transmission unit 42 by the control from the authentication control processing unit 40, and reception The transmission frequency change processing unit 431 is configured to change the reception frequency at the unit 43 under the control of the authentication control processing unit 40.

  There are a plurality of usage modes depending on the purpose, and the allocation of the frequency used by each mode is determined in advance depending on the possibility of interference.

  As an example, in the communication mode 10a (search mode / pairing mode / program (PG) download mode / maintenance mode for maintenance) for standby and searching for a partner with low interference (search mode), the frequency Ch1 (specific example is 11a). In the communication mode 10b (authentication mode) in which interference is expected to increase, a plurality of frequencies Ch2 to Ch4 (specifically, the 426.0375 MHz band / 426.0625 MHz band / 426.087 MHz band shown in 11b) ).

  In the card KEY51 of the user 50, the authentication control processing unit 40 first designates the transmission frequency setting processing unit 421 to set the transmission frequency to the frequency Ch1 (61a), sets the frequency Ch1 and sets the search portable device ID. A message is transmitted (63a).

  At this time, in the mobile phone 52, the authentication control processing unit 40 designates the reception frequency setting processing unit 431 to set the reception frequency to the frequency Ch1 (62a), sets the reception frequency to Ch1, and the search portable device. Wait for reception of ID message (63a).

  The authentication control processing unit 40 of the mobile phone 52 that has received the search portable device ID message (63a) checks whether the ID information in the received message is the ID of the communication partner, and if it is the ID of the communication partner. A search main body ID message in which its own ID information is set is returned (63b), the transmission / reception frequency is set to frequency Ch2 (62b), and the mode is changed to the authentication mode.

  The authentication control processing unit 40 of the card KEY 51 that has received (63b) the search body device ID message from the mobile phone 52 checks whether the ID information in the received message is the ID of the communication partner, and is the ID of the communication partner. In this case, the authentication control processing unit 40 of the card KEY 51 performs the designation to set the reception and transmission frequencies to the frequency Ch2 (61b) to the reception frequency setting processing unit 431 and the transmission frequency setting processing unit 432, respectively. Each processing unit sets the transmission / reception frequency to the frequency Ch2 and transitions to the authentication mode.

  Hereinafter, the exchange of the search portable device ID message and the search main device ID message will be collectively referred to as “sequence A”.

  The message and procedure exchanged in “Sequence A” shown here is an example, and if it is a procedure for searching for a communication partner, a different procedure (for example, the partner is first identified to some extent by exchanging a simple ID, and then The procedure of confirming with the full ID may be used.

  The authentication control processing unit 40 of the card KEY 51 that has transitioned to the authentication mode transmits (64a) an authentication request message that is encrypted and set using the encryption KEY that holds its full ID information in advance.

Upon receiving the authentication request message (64a), the authentication control processing unit 40 of the mobile phone 52 combines the received message using the encryption key stored in advance, and determines whether the ID information in the message is the ID of the communication partner. If the ID of the communication partner is confirmed, an authentication response message set by encrypting its own ID information is returned (64b), and a transition is made to a mode for checking the existence of the partner.

  The authentication control processing unit 40 of the card KEY 51 that has received the authentication response message from the mobile phone 52 (63b) performs decryption of the received message using the encryption key stored in advance, and the ID information in the received message is the communication partner. Check if the ID is. If it is the ID of the communication partner, it is determined that the partner has been identified, and the mode transitions to a mode for confirming the presence of the partner.

  The transmission / reception frequency is set to the frequency Ch2 (61b), and the mode is changed to the authentication mode.

  Hereinafter, the exchange of the authentication request message and the authentication response message is collectively referred to as “sequence B”.

  The message and procedure exchanged in the “sequence B” shown here is an example. If the procedure is to specify the communication partner with certainty, a different procedure (for example, first sending its own ID information, and the receiving party sends the communication partner) When the random number data for encryption is returned, the side that received the random number data encrypts and transmits the random number data with the encryption key stored in advance, and the random number data transmission side receives the received random number data The procedure may be such that the encrypted data is decrypted and confirmed that the data is the same as the data sent earlier, and if it matches, the own ID information is returned.

  The authentication control processing unit 40 of the card KEY 51 that has transitioned to the authentication mode for confirming the presence of the other party transmits (65a) data having a short message structure as simple authentication data. This is performed at a predetermined interval that is predetermined or changed using communication or the like, and is performed for a specific period that is predetermined or changed using communication or the like.

  The authentication control processing unit 40 of the mobile phone 52 receives the simple authentication data (65b) and confirms the received radio wave intensity.

  Hereinafter, the transmission of the simple authentication data and the radio field strength confirmation are collectively referred to as “sequence C”.

  In the case where an authentication system using a plurality of mobile phones and a card key exists in a close place such as a concert hall, in this sequence C (65), the radio wave intensity is sufficient and there is no restriction on the use of the mobile phone. .

  The message and procedure exchanged in the “sequence C” shown here is an example, and if it is simple, the procedure of confirming the response may be used.

  When the specific period has elapsed, both the authentication control processing unit 40 of the card KEY51 and the authentication control processing unit 40 of the mobile phone 52 continue while the partner can confirm the execution of the sequence B and the sequence C.

  During the execution of the sequence shown in FIG. 6, there was no particular problem in the sequence C, but as shown in FIG. 7 in the execution of the sequence B, the authentication request message transmitted by the authentication control processing unit 40 of the card KEY 51 due to the interference is a mobile phone. If the data cannot be correctly received on the side 52 (74a), the authentication control processing unit 40 of the mobile phone 52 cannot return a response, resulting in a reception timeout error.

  The authentication control processing unit 40 of the mobile phone 52 that has detected the time-out error makes a designation to set the reception frequency and the transmission frequency to the frequency Ch1 (72a) to the reception frequency setting processing unit 431 and the transmission frequency setting processing unit 432, respectively. Each designated processing unit sets the transmission / reception frequency to the frequency Ch1, shifts to the search mode, and executes the sequence A (75).

  If the authentication control processing unit 40 of the card KEY 51 also does not receive a response message, the request control message is transmitted again and the authentication control processing unit 40 of the mobile phone 52 cannot correctly receive it even if it is retransmitted (74b). The transmission / reception frequency is set to the frequency Ch1 (71a), the mode is changed to the search mode, and the sequence A (75) is performed.

  In FIG. 7, the authentication request processing message 40 by the authentication control processing unit 40 of the card KEY 51 is retransmitted once, but may be multiple times including zero.

  In this sequence A (75), the authentication control processing unit 40 of the card KEY51 transmits the search portable device ID message 81 in which the frequency (for example, the frequency Ch3) used for transmission / reception in the next authentication mode is set as the designated frequency information 81c. And waits for the main body ID message for search.

  The mobile phone 52 that has received the search portable device ID message 81 confirms the specified frequency information 81c when the mobile device ID information 81b matches the communication partner, and if the frequency is compatible (for example, usable). The search main device ID telegram 82 in which the frequency information (for example, frequency Ch3) designated in the frequency response information 82a is set is constructed and returned.

  The frequency information constituting the search main unit ID message 82 may be a code indicating acceptance instead of the frequency code.

  At the stage of receiving the search response main unit ID message 82 of the acceptance response, the authentication control processing unit 40 of the card KEY 51 sets the reception and transmission frequencies to the reception frequency setting processing unit 431 and the transmission frequency setting processing unit 432, respectively. Designation to be set (71b) to Ch3 is performed, and each designated processing unit sets the transmission / reception frequency to frequency Ch3, and shifts the processing to the subsequent processing (sequence B (76)).

  On the other hand, at the stage of transmitting the main device ID message 82 for search for an acceptance response, the authentication control processing unit 40 of the mobile phone 52 performs reception and transmission to the reception frequency setting processing unit 431 and the transmission frequency setting processing unit 432, respectively. Designation is made to set the frequency to frequency Ch3 (71b), and each designated processing unit sets the transmission / reception frequency to frequency Ch3 and shifts the processing to the subsequent processing (sequence B (76)).

(Embodiment 5)
FIG. 10 shows an example of a message structure transmitted and received in the search mode according to the fifth embodiment of the present invention.

  In FIG. 10A, 101 indicates a search portable device ID message, and in FIG. 10B, 102 indicates a search main unit ID message, 101a and 102a indicate synchronization signals for message reception, 101b indicates portable device ID information, 102b is main device ID information, 101c is available frequency information from the portable device, and 102c is frequency designation response information from the main device.

  FIG. 9 shows the case where the telegram shown in FIG. 8 of the fourth embodiment of the present invention is used in the search mode in the fourth embodiment of the present invention, and the mobile phone 52 side corresponds to the frequency specified by the card KEY 51 side. An example of a communication procedure (sequence) when it cannot be performed is shown.

  In FIG. 9, 91a is a frequency setting process related to the present embodiment in the portable device 51, 72a is a frequency setting process related to the present invention in the main device 52, 93 is a sequence in the search mode (sequence Ae), 93a, Reference numerals 93b, 93c, and 93d are transmission / reception messages in the sequence Ae.

  The operation will be described with reference to FIGS.

  The fifth embodiment is different from the fourth embodiment only in the message exchanged in the search sequence, and the other configuration is the same as the first embodiment.

  As shown in FIG. 9, in the message structure in the fourth embodiment, the authentication control processing unit 40 of the mobile phone 52 is set in the search portable device ID message (93a) transmitted from the authentication control processing unit 40 of the card KEY51. If the specified frequency information 81c cannot be handled (for example, the frequency cannot be used, or the same frequency as the previous frequency is designated to change the frequency), a code indicating that the frequency response information 82c cannot be handled Then, a search main unit ID message specifying a compatible frequency is constructed and a response is returned (93b), and the search portable device ID message is again waited.

  The authentication control processing unit 40 of the card KEY 51 that has received the response confirms the contents of the frequency response information 82c in the response message, and sets the frequency changed from the previously transmitted frequency in the designated frequency information 81c. Is transmitted (93c).

  On the other hand, the authentication control processing unit 40 of the mobile phone 52 confirms the designated frequency information 81c again, and if it cannot cope with it, a search code that designates a code indicating that it is impossible to deal with the frequency response information 82c or a frequency that can be dealt with. The main body device ID message is constructed and a response is returned (93d), and the search portable device ID message is waited.

  On the other hand, when the search portable device ID message 101 and the search main device ID message 102 shown in FIG. 10 are used, the authentication control processing unit 40 of the card KEY 51 can be used in the search portable device ID message 101. It is possible to specify a plurality of frequencies that can be handled in the frequency information portion, and finally confirm the information determined by the mobile phone 52 (frequency designation response information 102c), without having to perform a plurality of exchanges as shown in FIG. The transmission / reception frequency used in the authentication mode can be determined.

(Embodiment 6)
FIG. 13 shows an example of a frequency designation algorithm used in the authentication mode in the main device in the sixth embodiment of the present invention. In FIG. 13, S131 to S135 are processing contents in the main device.

  The operation will be described with reference to FIGS. 7, 8, 10, and 13.

  The sixth embodiment shows a specific algorithm for designating a frequency to be used in the subsequent authentication mode when interference is detected, and the other configurations are the same as those of the fourth and fifth embodiments. .

  In the sequence C (73), when both the card KEY51 and the mobile phone 52 are able to transmit and receive signals normally, and when the other party cannot be confirmed successfully in the sequence Be (74), the card KEY51 and the mobile phone 52 are separated. There is a high possibility that signal interference has occurred rather than having occurred.

In that case, interference is not avoided unless the frequency used in the authentication mode after sequence A (75) is different from the frequency used in sequence Be (74). If the signal strength cannot be confirmed by the authentication control processing unit 40 of the telephone 52 and the sequence Be (74) does not work, the card KEY5 is used rather than interference.
1 and the authentication control processing unit 40 of the mobile phone 52 are likely to be separated.

  In this case, the frequency used in the next authentication mode may be the same frequency as before, and if it is changed in reverse, there is a high possibility that it will be a hindrance to the device trying to avoid interference. .

  Therefore, in the authentication control processing unit 40 of the mobile phone 52 that has received the search portable device ID message (81 or 101) in the sequence A (75) (S131), the reception confirmation (signal strength) is performed in the sequence C executed immediately before that. In the frequency response information 82c or the frequency designation response information 102c if it has failed continuously more than the specified number of times (S132). A main body ID message for search (82 or 102) in which a frequency other than that used in the mode is set (S133) is configured and transmitted to the card KEY51 (S135).

  In the sequence C executed immediately before that, the confirmation of reception (the signal strength is not less than the specified level) has failed continuously for the specified number of times (S132). The frequency response information 82c or the frequency designation response information 102c is configured with a search main device ID message (82 or 102) in which the frequency used in the previous authentication mode is set (S134) and transmitted to the card KEY51 (S135). Configure.

(Embodiment 7)
FIG. 2 shows an example of a frequency use configuration of the authentication system according to the seventh embodiment of the present invention. In FIG. 2, 20a and 20b indicate communication modes, and 21a and 21b indicate specific communication frequencies.

  In this embodiment, the allocation of frequencies used by each of the usage modes in which a plurality of usages exist for each purpose is used, and the authentication mode 10b of FIG. And the initial authentication mode is set as the communication mode 20a in which the possibility of interference same as the search mode is reduced.

  FIG. 11 shows an example of a communication procedure (sequence) in the seventh embodiment of the present invention. 11, 111a and 111b are frequency setting processes related to the present invention in the portable device 51, 112a and 112b are frequency setting processes related to the present invention in the main device 52, 113 is a sequence in the search mode (sequence A), Reference numeral 114 denotes a first sequence (sequence B) in the application mode, and reference numeral 115 denotes a second sequence (sequence C) in the application mode.

  The operation will be described with reference to FIGS. In the seventh embodiment, the frequency of sequence B following sequence A is the same as that of sequence A, and other configurations are the same as those of the fourth embodiment, the fifth embodiment, and the sixth embodiment.

  After the sequence A (63, 113) is executed, the frequency is changed and the sequence B (64, 114) is executed. Since the message exchanged in the sequence A is not encrypted, the message exchanged in the sequence A (63, 113) may be different from the actual communication partner due to impersonation.

  In the subsequent sequence B (64, 114), the other party is surely specified. However, in the first to third embodiments, when it is determined that the other party is different in the sequence B (64), the frequency is sequenced again. The processing is performed after returning to A (63), and an extra frequency change is performed several times.

  In the present embodiment, the sequence A (113) and the sequence B (114) are processed using the same frequency, and even if it fails, the sequence A (113) can be implemented without changing the frequency. Configure.

(Embodiment 8)
FIG. 3 shows an example of a frequency use configuration of the authentication system according to the eighth embodiment of the present invention. In FIG. 3, 30a, 30b, and 30c indicate communication modes, and 31a, 31b, and 31c indicate specific communication frequencies.

  In the present embodiment, the application mode 20b of FIG. 2 having a high possibility of interference is further separated into a partner confirmation authentication mode 30b in which the influence of interference is large and a presence confirmation authentication mode 30c in which the influence of interference is small. Set.

  FIG. 12 shows an example of a communication procedure (sequence) in the eighth embodiment of the present invention.

  12, 121a, 121b, and 121c are frequency setting processes related to the present invention in the authentication control processing unit 40 of the portable device 51, and 122a, 122b, and 122c are related to the present invention in the authentication control processing unit 40 of the main device 52. Frequency setting processing, 123 is a sequence in search mode (sequence A), 124 is a first sequence in application mode (sequence B), a sequence performed immediately after the transition from search mode, and 125 is a second sequence in application mode (Sequence C) is a sequence performed once after the sequence C is executed in the first sequence (sequence B) in the application mode.

  The operation will be described with reference to FIGS.

  In the eighth embodiment, the frequency of sequence B following sequence A is different from that of sequence C (may be the same as sequence A), and other configurations are the same as those in the fourth to seventh embodiments. The same.

  Even if there is interference in the sequence C (65, 125), if the signal strength is to be confirmed, it is recognized that the other party exists, and if there is interference in the subsequent sequence B (66, 126) The other party cannot be identified.

  The possibility that sequence B (64, 124) is completely synchronized with a plurality of authentication systems including the card KEY51 and the mobile phone 52 and interference occurs is much smaller than the possibility that the frequency of the sequence C overlaps with the sequence B. Become.

  In the present embodiment, processing is performed using different frequencies in sequence B and sequence C, interference in sequence B for identifying the other party can be reduced, and the probability that sequence A must be performed again is determined. It is configured so that it can be reduced.

  The means described in the embodiment is a program for cooperating hardware resources such as a CPU (or microcomputer), a RAM, a ROM, a storage / recording device, an electrical / information device including an I / O, a computer, a server, and the like. You may implement with the form. In the form of a program, new functions can be easily distributed / updated and installed by recording them on a recording medium such as magnetic media or optical media or distributing them via a communication line such as the Internet.

  As described above, the authentication system and program according to the present invention restricts the operation of electronic devices due to interference even in concert halls and crowded trains where other authentication systems that perform similar control processing are likely to be crowded. This can be suppressed, and an electronic device that can improve the convenience of use of the electronic device can be provided.

  Of course, it is not limited to a mobile phone or a card KEY, and may be another device.

The figure which shows an example of the frequency allocation in Embodiment 4 of this invention The figure which shows an example of the frequency allocation in Embodiment 7 of this invention The figure which shows an example of the frequency allocation in Embodiment 8 of this invention. The figure which shows the example of 1 structure of the authentication apparatus of this invention The figure which shows the example of 1 structure of the authentication system with which this invention is applied The figure which shows an example of the communication sequence in Embodiment 4 of this invention The figure which shows an example of the communication sequence in Embodiment 4 of this invention The figure which shows an example of the message | telegram structure used in Embodiment 4 of this invention. The figure which shows an example of the communication sequence in Embodiment 5 of this invention. The figure which shows an example of the message | telegram structure used in Embodiment 6 of this invention. The figure which shows an example of the communication sequence in Embodiment 7 of this invention. The figure which shows an example of the communication sequence in Embodiment 8 of this invention. The figure which shows the algorithm of the frequency change judgment of the main body apparatus in Embodiment 6 of this invention. The figure which shows the example of 1 structure of the portable device in Embodiment 1 of this invention. The figure which shows the example of 1 structure of the main body apparatus in Embodiment 1 of this invention. The figure which shows an example of the message | telegram structure used with the authentication system to which this invention is applied. The figure which shows an example of the message | telegram structure used in Embodiment 1 of this invention. The figure which shows an example of the communication sequence in Embodiment 1 of this invention The figure which shows the example of 1 structure of the portable device in Embodiment 2 of this invention. The figure which shows the example of 1 structure of the main body apparatus in Embodiment 2 of this invention. The figure which shows an example of the message | telegram structure used in Embodiment 2 of this invention. The figure which shows an example of the communication sequence in Embodiment 2 of this invention. The figure which shows an example of the communication sequence in Embodiment 3 of this invention.

Explanation of symbols

10a, 10b, 20a, 20b, 30a, 30b Communication mode 11a, 11b, 21a, 21b, 31a, 31b Communication frequency 140 Wireless communication processor A
141 Transmission / reception frequency change processing unit A (communication frequency change processing unit A)
142 Transmission / reception frequency determination processing unit A (communication frequency determination processing unit A)
143 First communication mode processing unit A
144 Second communication mode processing unit A
150 Wireless communication processor B
151 Transmission / reception frequency change processing unit B (communication frequency change processing unit B)
152 Transmission / reception frequency determination processing unit B (communication frequency determination processing unit B)
153 First communication mode processing unit B
154 Second communication mode processing unit B
161, 171, 211 Authentication request message 161a, 162a Synchronization signal code part 161b, 171b, 211b, 162b, 172b, 212b Message type code part 161c Mobile device ID information code part 162, 172, 212 Authentication response message 162c Main unit device ID information Code part 171d, 172d Communication frequency designation information data part 181a-181d, 221a-221d, 231a-231c Internal processing in card KEY51 182a-182d, 222a-222d, 232a-232c Internal processing in mobile phone 52 183a-183g, 223a to 223h, 233a to 233g Transmission / reception message between the card KEY11 and the mobile phone 12 191 Processing start timing information holding unit A
201 Processing start timing information holding unit B
211d, 212d Timing information data part 421 Transmission frequency change processing part (transmission frequency changing means)
431 Reception frequency change processing unit (reception frequency changing means)
51 Mobile device 52 Main device (main device)
62a, 72b, 112b, 122b, 122c Frequency setting processing in main device 63, 75, 113 Sequence in search mode (sequence A)
63a, 63b Transmission / reception message 64, 114 First sequence in authentication mode (sequence B)
65, 73, 115 Second sequence in authentication mode (sequence C)
71a, 71b, 111b, 121b, 121c Frequency setting processing in portable device 81, 101 Search portable device ID message 82, 102 Search main device ID message 81c Designated frequency information (communication frequency designation information) from portable device
82c Frequency response information from main device 101c Available frequency information from mobile device (communication frequency designation information)
102c Frequency designation response information from main unit

Claims (8)

When a portable device and a main device that perform wireless communication in a plurality of operation modes are provided, the portable device and the main device are within a predetermined distance, and the other party cannot be confirmed between the main device and the portable device, An authentication system that restricts the function of the main device or generates an alarm,
The plurality of operation modes are:
A first operating mode in which a single communication frequency is assigned;
A plurality of communication frequencies different from the communication frequencies assigned to the first operation mode, and a second operation mode having a higher communication frequency than the first operation mode, the portable device and the Each main device includes a transmission / reception frequency determination processing unit that determines a communication frequency in the second operation mode by exchanging communication messages in the first operation mode, and a communication frequency change processing unit that changes the communication frequency. And
When the portable device and the main device detect interference during communication in the second operation mode , the portable device and the main device transition to the first operation mode and activate the transmission / reception frequency determination processing unit to The communication frequency change processing unit transmits / receives the telegram that has been set, determines the frequency to be used in the second operation mode with the portable device, and transitions to the second operation mode. An authentication system that is configured to change frequency. As a message to be exchanged for partner confirmation in the first operation mode, it is configured to include communication frequency designation information used in the second operation mode, and the portable device and the main device are in the second operation mode. The authentication system according to claim 1, wherein communication is performed at a frequency indicated by the communication frequency designation information finally determined at the time of transition. In the procedure for partner confirmation in the first operation mode, the communication frequency determination processing unit (communication frequency determination processing unit A) of the portable device or the main device that first transmits a message is first The communication frequency designation added to the response message (referred to as the second telegram) to which the transmission message (first telegram) is added with the communication frequency designation information and transmitted. Confirm the information, and if the communication frequency information added to the second message is different from the frequency added to the first message but can be used, the next transmission message (assumed to be the third message) The same communication frequency designation information added to the second telegram is added and transmitted, and if it is not usable, the communication frequency designation information that can be used is added and transmitted, and a response telegram (fourth telegram,
When the communication frequency information added to the fourth telegram is the same as the information transmitted by appending to the third telegram, it is possible to shift to the second operation mode. Configured as
In the procedure for partner confirmation in the first operation mode, the communication frequency determination processing unit (communication frequency determination processing unit B) of the main device or the portable device that first receives a message is the first In a message exchanged for partner confirmation in one operation mode, when the frequency specified by the communication frequency designation information added to the received first message is available, the second message In response to adding the same communication frequency designation information that was added to the first telegram in the case of being unusable, respond by adding communication frequency designation information available to the second telegram, Waiting for the reception of the next third message, and if the frequency specified by the communication frequency specification information added to the received third message is available, the third message is sent by the fourth message. Attached to the message Authentication system according to claim 2 configured to have been a response by adding the same communication frequency designation information allows shifts to the second operation mode. The communication frequency determination processing unit A sets a plurality of frequencies that can be used as the communication frequency designation information to be added to the first telegram in the procedure for partner confirmation in the first operation mode. It is possible to shift to the second operation mode when the communication frequency designation information transmitted and then added to the second telegram is one of a plurality of frequencies set in the first telegram. To configure
The communication frequency determination processing unit B is a frequency that can be used for the frequency set in the communication frequency designation information added to the received first telegram in the procedure for partner confirmation in the first operation mode. In the case where there is an error, it is configured to select one of the available frequencies, add it as the communication frequency designation information to the second telegram, and transmit it so as to be able to shift to the second operation mode. Item 4. The authentication system according to any one of Items 2 to 3. As a message to be exchanged for partner confirmation in the first operation mode, it is configured to include timing information of procedure execution start for partner confirmation at the time of transition from the second operation mode to the first operation mode, The authentication system according to any one of claims 1 to 4, wherein the portable device and the main device communicate at a frequency indicated by the communication frequency designation information that is finally finalized when shifting to the second operation mode. The communication frequency determination processing unit A transmits the first telegram without or adding the timing information in the procedure for partner confirmation in the first operation mode, and the timing information is added. Whether timing information added to the second message is the same as timing information added to the first message if timing information was added to the first message when the second message was received If timing information is not added to the first message, add the same timing information as that added to the second message to the next third message. Transmit, wait for the fourth telegram, and when the timing information added to the fourth telegram is the same as the information added to the third telegram and transmitted, And configured to allow the transition to the mode,
The communication frequency determination processing unit B of the main device or the portable device that first receives a message as a procedure for confirming the partner is the first message in the message exchanged for the partner confirmation in the first operation mode. If the timing information is added to the first message, the timing information is added to the second message sent back after receiving the message, and if the timing information is not added to the first message When the timing information is added and transmitted, and when the timing information is not added to the first message, waiting for reception of the next third message,
6. The authentication system according to claim 5, wherein the timing information added to the received third telegram is added to the fourth telegram and responded to enable transition to the second operation mode. The main device and the portable device determine that interference has occurred in the second operation mode when a message for confirming that the devices are associated with each other cannot be exchanged. The authentication system according to any one of 1 to 6. In the second operation mode,
The main device or the portable device exchanges mutual ID information to identify and confirm a communication partner (referred to as a first authentication mode);
An authentication mode having an operation mode (second authentication mode) for confirming the presence of the other party by the signal strength of the signal from the other party,
The communication frequency used in the first authentication mode and the communication frequency used in the second authentication mode are different frequencies,
The authentication system according to any one of claims 1 to 7, wherein a communication frequency of the second operation mode determined in the first operation mode is a communication frequency used in the first authentication mode.

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