JP4793368B2 - Wireless authentication system - Google Patents

Description

  The present invention 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 when the wireless key and the main body side device exceed a predetermined communication range, The present invention relates to a wireless device that can be used for an authentication device that restricts the function of a side device or generates an alarm.

  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 can be confirmed by both parties (see, for example, Patent Document 1).

In Patent Document 1 of this wireless two-way communication system, a device (hereinafter referred to as an authentication device) mounted on the main body side such as an electronic device is periodically issued from a portable device (hereinafter referred to as a wireless key). It is described that the authentication ID is received and collated with the ID stored in the authentication device.
JP 2004-143806 A

  However, in the conventional configuration, although it is possible to control whether or not it is within a predetermined distance (range), there is no mechanism for adjusting this distance according to the application. Further, when the wireless key is provided with a button or the like, there is no means for transmitting the information, so that a flexible system cannot be configured.

  The present invention solves the above-described conventional problems. For example, the wireless function can adjust the security function according to the situation in which it is used without losing the electronic device such as a personal computer or theft prevention function (security function). The purpose is to provide a machine.

  In order to solve the above-described conventional problems, the wireless device of the present invention includes a search mode for confirming the presence of another wireless device by wireless communication and an authentication mode for performing authentication communication with the other wireless device. In the wireless communication of each mode, operation information indicating that an operation is performed is included in the transmission signal.

  According to this, when one of the wireless devices is in operation, the wireless device that is the communication partner can know the state, and as a result, it is possible to provide a communication system according to the usage situation. It becomes possible.

By using the wireless device of the present invention, for example, in an authentication system for an electronic device such as a personal computer and a wireless key, in a place where the distance between the personal computer and the wireless key is increased while securing a misplacement or theft prevention function. It is possible to achieve both convenience for various purposes including presentation.

  The first invention confirms the presence of another wireless device by wireless communication, and in the authentication system having some use restriction function according to the reception level, operation information indicating that the operation is performed in the transmission signal; By including the authentication range information supplementing the operation information in the transmission signal, the wireless device can change the threshold of the reception level for determining the use restriction based on the operation information and the authentication range information.

  By including the information of the authentication range of the operation information in the transmission signal, the wireless device that has received this can grasp the state of the wireless device that is the communication partner, so a flexible communication system can be constructed according to the usage situation . For example, when there is no operation, when the reception level of the received signal is above a certain threshold, that is, only a short distance can be used, and if there is any operation, this threshold can be lowered to increase the permitted distance When there is a possibility that the PC and wireless key will be more distant than usual during presentations etc., it is possible to automatically extend the usable distance, and security functions such as misplacement and theft prevention It is possible to ensure both convenience and convenience required for use.

  The second invention provides the transmission signal with information indicating the priority for supplementing the operation information to the transmission signal transmitted from the wireless device, so that the operation information is obtained when the operation information requires immediate responsiveness or when a plurality of data is received. Is a radio that performs processing based on priority when there are a plurality of.

  By including the priority information in the transmission signal, the wireless device that has received the information can determine whether or not the operation information from the communication partner is an immediate response. When the priority is high, it is possible to respond flexibly to an instruction that requires immediate responsiveness by performing processing immediately according to the priority information. In addition, since a wireless device that has received a plurality of requests in the search mode can perform processing from a higher priority after transitioning to the authentication mode, satisfactory responsiveness can be ensured.

  According to a third aspect of the present invention, the transmission signal is provided with time information indicating a communication cycle time for changing the communication cycle for supplementing the operation information to the transmission signal transmitted from the wireless device. It is a radio that performs communication at an appropriate communication cycle.

  By including the time information in the transmitted message, the operation expected as a result of the operation information is set to time information that satisfies the expected immediate responsiveness by shortening the communication interval when, for example, immediate responsiveness is required. Thus, when the operation identification code is transmitted, it is possible to obtain a satisfactory result from the radio apparatus of the communication partner that has received the operation identification code.

  According to a fourth aspect of the present invention, when one of the wireless devices has a laser pointer function, a safety switch and a laser are provided so that the laser pointer having the wireless function is not irradiated with a laser when the button is carelessly pressed as a safety function. If there is an irradiation switch for irradiating, when the safety switch is released, the operation information and the authentication range information accompanying the operation information are included in the transmission signal, so that the authentication appropriate for the use situation It is a radio that can automatically adjust to the distance.

If the authentication distance assumed by the operation requires a distance, for example, it is possible to automatically set a wide authentication range to prevent authentication from being accidentally removed, and authentication according to the usage situation A system can be provided. In addition, the operation information is added to the transmission message by releasing the safety switch, so it is possible to expand the range of use without laser irradiation, and wireless with a laser pointer function that provides both safety and convenience Key can be provided.

  In the fifth aspect of the invention, particularly in the fourth aspect of the invention, when the safety switch of the laser pointer having a wireless function is enabled and the laser cannot be irradiated, the operation information and the authentication range associated with the operation information are set. By including information in the transmission signal, it is a wireless device that can automatically adjust to an authentication distance suitable for the use situation.

  If the authentication distance assumed by the end of the operation does not require a distance, for example, the authentication range is automatically set to be narrow to prevent the setting state changed by the operation from being forgotten. To do. Since the setting can be returned to the original state when the operation is completed, it is possible to achieve both security and convenience in use restriction.

  According to a sixth aspect of the invention, a wireless device that has received operation information and information supplementing the operation information notifies the information.

  When the wireless device that received the operation information for releasing the safety switch of the laser pointer was a personal computer, the safety switch was released by notifying the user that the safety switch was released with a screen or sound. I can confirm that. As a result, this state can be noticed when the safety switch is unexpectedly released. In addition, when the safety switch is intentionally released, it is possible to confirm that the communication settings have been changed, and provide a wireless key and personal computer authentication system with a laser pointer function that provides both safety and convenience. be able to.

  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. 1 shows a block diagram of a wireless device A according to an embodiment of the present invention.

  The wireless device A is a wireless key having a laser pointer function, and transmits and receives wireless communication by the wireless unit 100 connected via the first antenna 1. The laser irradiation unit 101 is a part that irradiates a laser based on a laser irradiation signal from the control unit 104. The irradiation button 102 is a button for irradiating a laser, and is pressed by the user.

  The safety switch 103 is provided for safety so as not to inadvertently perform laser irradiation. When the safety switch 103 is released, the pressing of the irradiation button 102 becomes valid, a laser irradiation signal is generated by the control unit 104, and the laser is irradiated from the laser irradiation unit 101. On the other hand, when the safety switch 103 is not released, the laser irradiation unit 101 does not irradiate the laser even when the irradiation button 102 is pressed.

  The wireless unit 100 includes a time control unit 105, a transmission / reception unit 106, and an authentication unit 107. The time control unit 105 is used to measure a time during which a radio signal cannot be received as described later. For example, when the radio signal cannot be received for a certain period of time in an authentication mode described later, a process for returning to the search mode is performed. Do. The transmission / reception means 106 can perform transmission / reception related to wireless communication. Further, the authentication unit 107 periodically communicates with the wireless device B in time synchronization, and restricts the use when a wireless signal from the wireless device B is received at a predetermined reception level or lower. Do.

  FIG. 2 is a block diagram illustrating a wireless device B that performs wireless communication with the wireless device A in FIG.

  The wireless device B includes a second antenna 201, a second transmission / reception unit 202, a second time control unit 203, and a second authentication unit 204.

  The wireless device B can perform transmission / reception of wireless communication via the second antenna 201, and the second transmission / reception unit 202 can perform transmission / reception related to wireless communication. The second time control means 203 is used to measure a time during which a radio signal cannot be received as will be described later. For example, when a radio signal cannot be received for a certain period of time in the authentication mode described later, the second time control means 203 enters the search mode. Perform the process to return. The second authentication unit 204 periodically communicates with the wireless device A in time synchronization, and when a wireless signal from the wireless device A is received at a predetermined reception level or lower. Restrict usage.

  The wireless device A is a wireless key having a laser pointer function, for example, and is carried by the user of the wireless device B. The wireless device B has a personal computer, for example, and the use restriction is imposed when the reception level of the radio wave from the wireless device A becomes weak (the use restriction is, for example, if the wireless device B is a personal computer, the use restriction is applied. (You can enter a state where you cannot perform operations or access a network, or you can view personal information not only on a network but also on a file.)

  3 and 4 show a communication sequence between the wireless device A and the wireless device B, FIG. 3 shows a communication sequence in the search mode, and FIG. 4 shows a communication sequence in the authentication mode.

  The search mode is a mode in which the wireless device A and the wireless device B confirm each other's existence and shift to the authentication mode.

  The authentication mode is a mode in which the wireless device A and the wireless device B periodically communicate with each other in time and confirm the existence of the other party. The presence of the other party is confirmed in the authentication mode, and the wireless device B is not restricted in use while receiving radio waves from the wireless device A at a predetermined reception level or higher.

  Here, the sequence in the search mode will be described with reference to FIG.

  The wireless device A repeats the carrier sense of the search channel with a period T in order to receive a signal transmitted from the wireless device B set as a pair with the wireless device A. On the other hand, the wireless device B transmits the search request signal 12 at least for a period longer than the carrier sense period T of the wireless device A. The wireless device B that is not synchronized with the wireless device A can transmit the search request signal 12 for a period longer than the carrier sense T of the wireless device A so that the wireless device A can receive the search request signal 12. I have to. Radio B continues to transmit search request signal 12 periodically until it receives search signal 13 transmitted from radio A that has received search request signal 12.

  If the wireless device A does not receive the search request signal 12 from the wireless device B, it repeats the carrier sense of the search channel. Further, when the wireless device A receives the search request signal 12 from the wireless device B in the wireless communication area during the carrier sense, the wireless device A transmits the search signal 13 to the wireless device B. When the wireless device B receives the search signal 13, the wireless device B transmits a search response signal 14. The wireless device A that has received the search response signal 14 transmits to the wireless device B a key ID signal 15 including an identification code for identifying the own device (wireless device A). The wireless device B that has received the key ID signal 15 receives the identification code included in the key ID signal 15 and the identification code stored in advance as data by the own device (wireless device B). Is the identification code of the wireless device A that is paired with the device to be authenticated.) And the identification code for identifying the own device (wireless device B) if they match. A terminal ID signal 16 including is transmitted to the wireless device A.

  After receiving the terminal ID signal 16, the wireless device A performs transmission / reception of signals with the wireless device B using a challenge and response method. That is, the wireless device A that has received the terminal ID signal 16 transmits a challenge request signal 17 to the wireless device B. The wireless device B that has received the challenge request signal 17 transmits a challenge signal 18 generated by generating a random number of 8 bytes to the wireless device A, and encrypts the challenge signal 18 by an encryption process common to the wireless device A. The encrypted signal is stored. The wireless device A that has received the challenge signal 18 transmits to the wireless device B a response signal 19 generated by performing an encryption process common to the wireless device B on the challenge signal 18. The wireless device B that has received the response signal 19 compares the response signal 19 with the encrypted signal that was stored when the challenge signal 18 was transmitted to the wireless device A and collates it. If the signals match, the wireless device B determines that the authentication with the wireless device A is successful, and transmits an ACK signal 20 notifying that the authentication is successful to the wireless device A.

  If the signal after the key ID signal 15 cannot be received from the counterpart device for a predetermined time, the wireless device B starts transmitting the search request signal 12 again, while the wireless device A searches for the search transmitted from the wireless device B. The carrier sense of the request signal 12 is started again. Among the above-described sequences, a period from when the wireless device B starts transmitting the search request signal 12 to when the wireless device A receives the ACK signal 20 is referred to as a search mode (note that the wireless device B is connected to the search request signal 12). The period from the start of transmission of the wireless device A until the wireless device A receives the terminal ID signal 16 until the wireless device A receives the ACK signal 20 after the wireless device A transmits the challenge request signal 17 The period is sometimes referred to as an initial authentication mode). In addition, after transmitting or receiving the ACK signal 20, the wireless device B and the wireless device A transition to an authentication mode described later.

  Next, a sequence after the wireless device B transmits the response signal 19 in the search mode will be described with reference to FIG. In order to synchronize with the counterpart device, the wireless device A and the wireless device B start timing from the time when the wireless device A transmits the response signal 19 to the wireless device B, while the wireless device B It is assumed that timing starts from the time when the response signal 19 is received from the wireless device A. Note that the wireless device B corrects the time measurement in accordance with the frame synchronization of various signals received from the wireless device A.

  The wireless device A repeats carrier sense of the signal transmitted from the wireless device B at a cycle of 2T from the start of timing (the wireless device A is the carrier of the authentication channel at the time indicated by “◯” in FIG. 4). Sense is being implemented.) The wireless device B that has transitioned to the authentication mode thereafter transmits an arbitrary request signal to the wireless device A in accordance with the timing at which the wireless device A senses the carrier.

  In addition, the wireless device A may perform carrier sense of the search channel at a period of T after starting the time measurement. As for the carrier sense of the search channel by the wireless device A, a plurality of wireless devices B set in pairs with the wireless device A are registered in the wireless device A, and there is an authentication target device that does not perform wireless authentication even for one device. In this case, it is performed to receive a signal transmitted from the wireless device B that has not performed wireless authentication. Note that the timing for performing carrier sense for the authentication channel may overlap with the timing for performing carrier sense for the search channel. In such a case, the radio A performs carrier sense for the authentication channel first, This is handled by the process of performing carrier sense of the search channel when radio waves from the wireless device B cannot be detected.

When the time 2T elapses after receiving the response signal 22, the wireless device B transmits a challenge signal 21 generated by generating a random number of 8 bytes up to that time to the wireless device A, and the challenge The signal 21 and an 8-byte encrypted signal obtained by encrypting the challenge signal 21 by the encryption process common to the wireless device A are stored.

  The wireless device A that has received the challenge signal 21 stores the challenge signal 21 and an 8-byte response signal 22 generated by performing an encryption process common to the wireless device B on the challenge signal 21. The response signal 22 is transmitted to the wireless device B. The wireless device B that has received the response signal 22 compares and compares the response signal 22 with the encrypted signal stored when the challenge signal 21 is transmitted to the wireless device A. If the signals match, the wireless device B determines that the authentication with the wireless device A is successful. This series of authentication processing is repeated every 16T.

  Next, a sequence when the wireless device B cannot receive a response signal in the authentication mode will be described. When the wireless device B transmits the challenge signal 21 in a cycle of 16T but cannot receive the response signal 22 from the wireless device A with respect to the challenge signal 21, the same challenge signal 21 is obtained 2T after the transmission of the challenge signal 21. Will be resent. If the wireless device B can receive the response signal 22 from the wireless device A with respect to the retransmitted challenge signal 21, the challenge signal is transmitted when 16T elapses after the first challenge signal 21 is transmitted to the wireless device A. 21 is transmitted to the wireless device A.

  On the other hand, if the wireless device B cannot receive the response signal 22 from the wireless device A for the challenge signal 21 after transmitting the challenge signal 21, the wireless device B retransmits the same challenge signal 21 2T after the challenge signal 21 is transmitted. To do. If the wireless device B can receive the response signal 22 from the wireless device A in response to the challenge signal 21, the wireless device transmits the challenge signal 21 when 16T has elapsed since the first challenge signal 21 was transmitted to the wireless device A. Transmit to machine A.

  Furthermore, when the wireless device B reaches the predetermined number of retransmissions of the challenge signal 21 or when 4T elapses from the time when the wireless device A should receive the first challenge signal 21, the wireless device B starts transmitting the search request signal 12. Transition to search mode. And the radio | wireless machine B will add the restriction | limiting with respect to at least one part of the function with which the radio | wireless machine B is provided, or will continue the restriction | limiting if it has already applied the restriction | limiting. On the other hand, the wireless device A stops the carrier sense of the authentication channel for the wireless device B at the interval of 2T after 4T from the time when the wireless device A should receive the first challenge signal 21, and at the same time, the carrier sense of the search channel. Will do.

  In some cases, the wireless device A can receive the challenge signal 21 from the wireless device B, but the wireless device B cannot receive the response signal 22 transmitted from the wireless device A. If the wireless device A receives the challenge signal 21 retransmitted from the wireless device B after transmitting the response signal 22, the wireless device A retransmits the response signal 22.

  The wireless device B performs wireless authentication with the wireless device A by the sequence as described above, and adds or removes restrictions on some or all of the various functions provided in the wireless device B.

  Next, a message structure transmitted and received by the wireless device A and the wireless device B will be described with reference to FIG. FIG. 5 shows a message structure used at the time of transmission / reception in the authentication mode, which includes a bit synchronization signal 50, a frame synchronization signal 51, a header portion 52, and a data portion 53. The header section 52 includes various control information, and includes a data length 60, a type 61, ID information 62, operation information 63, and an option 64.

The data length 60 includes the length of data after the header portion 52. The type 61 includes information indicating various message types in the communication sequence. The ID information 62 includes unique ID information and destination ID information possessed by the wireless device. The operation information 63 includes information indicating whether or not a button or switch provided in the wireless device A has been operated. The option 64 includes information for supplementing the operation information 63, and specifically includes a priority 70, time information 71, and an authentication range 72.

  The priority level 70 includes information for determining a priority level for processing information indicated in the operation information 63. For example, it is possible to determine whether or not the information shown in the operation information 63 requires immediate responsiveness by including any one of three levels of high, medium, and low in the priority level 70. Here, although there are three stages, more stages may be provided.

  The time information 71 includes information for determining a communication time interval in the authentication mode. For example, when immediate responsiveness is required, communication may need to be frequently performed. In this case, the time information 71 can be used to specify a small communication time interval.

  The authentication range 72 includes information for determining a distance to be used when the wireless device A and the wireless device B are separated from each other. This is used when it is desired to widen the authentication range in order to perform a certain operation from the current setting, or conversely to narrow the authentication range. For example, steps such as narrow, medium and wide can be provided.

  By the way, the wireless device A as a laser pointer is generally used mainly for presentations and the like, but the wireless device A may be far away from the wireless device B as a personal computer.

  In such a case, there is a possibility that usage may be restricted during the presentation, which is not convenient. Although it is possible to change the setting manually, it is not convenient because it is assumed that you forgot to change the setting or that you forgot to restore the setting after the presentation ends. Moreover, it is not preferable from the viewpoint of security.

  Therefore, when the safety switch 103 is released in the authentication mode shown in FIG. 4, the operation information 63 in the response signal 22 includes information indicating that the safety switch 103 is released, and the option 64 is an authentication. Include information to broaden the scope. Specifically, if the authentication range is operating with a setting of “Narrow”, enter the information of “Medium” or “Wide” and lower the threshold of the reception level based on this information to set the authentication range. Make it wide.

  In addition, since it is preparation before using a laser pointer and immediate responsiveness is not calculated | required, you may include the information which shows that a priority is low in the priority 70. FIG.

  According to this, when receiving this signal, the wireless device B can know that the wireless key safety switch 103 has been released, operates with a wide authentication range, and has a wide authentication range for the wireless key. Since the subsequent authentication sequence can be continued by setting and the authentication range can be automatically adjusted, unintended use restrictions can be prevented.

The laser irradiation should be operated irregularly. Therefore, the operation information may be put on the response signal 22 only once at the transmission timing of the next response signal 22 after the operation of the irradiation button 102 is performed. If there is no operation of the irradiation button 102 between the transmission of the response signal 22 and the transmission of the next response signal 22, there is no need to put information on pressing of the irradiation button 102 in the operation information 63. The personal computer side that receives the signal 22 and the wireless key side that transmitted the response signal 22 need only operate with the previous settings. When the irradiation button 102 is pressed again, it may be put on the operation information 63 at the next response signal 22 transmission timing.

  Note that the safety switch 103 may be a slide-type general switch, or may physically cover the laser irradiation port, and does not stick to its shape or material.

  Here, the operation on the side of the wireless device B that has received the response signal 22 including the operation information 63 described above in the authentication mode will be described. The personal computer that has received the operation information 63 of the safety switch 103 and the irradiation button 102 notifies the user using a personal computer application. For example, the information may be displayed on the application screen, or a buzzer sound or LED lighting may be used. Thus, by displaying the operation information to the user, it is possible to prevent the safety switch from being used or left in the released state. In addition, since it is possible to notify an unintended laser irradiation or the like, it is possible to provide a safe wireless key.

  Next, an operation when the challenge signal 21 is retransmitted in the authentication mode will be described. As described above with reference to FIGS. 3 and 4, when the personal computer cannot receive the response signal 22 from the wireless key for the challenge signal 21, the same challenge signal 21 is retransmitted 2T after the challenge signal 21 is transmitted. As a matter of course, the response signal 22 is also transmitted after 2T. That is, the transmission of the operation information 63 is delayed by 2T time.

  Therefore, in consideration of this delay time, in the case of retransmission, information for further increasing the priority is included in the priority 70 that supplements the operation information 63. For example, if there is no retransmission and the transmission is performed with a low priority, the priority is set to medium or high at the time of retransmission. By doing so, responsiveness can be ensured even when a temporary problem occurs in wireless communication.

  Next, the operation in the search mode will be described. Since the state of the search mode is a state in which the communication partner cannot be authenticated, that is, cannot be specified, the information included in the operation information 63 and the option 64 is not immediately reflected. This is to prevent malfunctioning by receiving a signal from another communication partner in a state where authentication is not confirmed. However, if the message is correct until it is determined that the communication partner is not to be communicated, the operation information 63 and option 64 are stored and immediately reflected when the mode is changed to the authentication mode. With this configuration, even when authentication is removed from the authentication mode, the mode is changed to the search mode, and the mode is changed to the authentication mode again, the operation information 63 and the option 64 can be reflected relatively smoothly. it can. That is, since the operation information 63 and options 64 received in the search mode are stored, it is possible to process immediately when the mode is changed to the authentication mode. Further, it is assumed that the operation information 63 and the option 64 are received a plurality of times in the search mode, but in this case as well, it is possible to process from the highest priority based on the priority 70. Therefore, the operation information 63 and options 64 in the search mode are not wasted.

  When the presentation is finished and the safety switch 103 is enabled and laser irradiation cannot be performed, the operation information 63 and option 64 are used in the response signal 22 to set both the radios A and B. Revert and continue authentication.

The operation information 63 includes information indicating that the safety switch 103 has been activated, and the option 64 returns the time information 71 and the authentication range 72 to the initial state by including information before the presentation. At this time, since it is not necessary to obtain immediate responsiveness, the priority may be low.

  With the above configuration, it is possible to automatically change the communication interval and authentication range according to the situation where the wireless key is used, and it is flexible with both security, safety and convenience. An authentication system can be provided.

(Embodiment 2)
Next, FIG. 6 shows a configuration different from the wireless device A shown in FIG. A difference from FIG. 1 is that a mouse button 108 is added. The mouse button 108 is used for page turning of the personal computer screen, screen scrolling, etc. in the presentation, but immediate response is required for such an operation request.

  Therefore, when the mouse button 108 is operated in the authentication mode and there is such operation information 63 that requires immediate responsiveness, the priority 70 of the option 64 is set high, and the time information indicating the communication interval is also short. Set the value. The authentication range is set to a wide setting as long as the safety switch 103 is released as described above.

  By increasing the priority, the personal computer that has received the information by the response signal 22 immediately processes the information. For example, in the case of a presentation screen, screen page turning and screen scrolling are performed. Further, the communication interval in the authentication mode is basically every 16T. Therefore, authentication is frequently performed by setting T shorter than usual by the time information 71, and as a result, the communication interval can be shortened and a certain degree of immediate response can be ensured.

  It can also be said that there is a limit to shortening T. In the normal sequence, the response signal 22 is retransmitted in accordance with the retransmission of the challenge signal 21 as described above. In such a case, the response signal 22 is retransmitted when the mouse button 108 is pressed. Can ensure immediate responsiveness. In this case, the same content as the response signal 22 transmitted last time is set in the data section 53, and only the operation information 63 and the option 64 are changed. In this way, the personal computer side only needs to pay attention to only the operation information 63 and the option 64, and there is no trouble in authentication. In addition, since it is not necessary to make the communication interval extremely small, it is possible to provide an authentication system that suppresses power consumption and ensures immediate response.

  Note that the forms and numerical values described in the above embodiment are merely examples for explanation, and the present invention is not limited thereto.

  1 described in this embodiment cooperates with hardware resources such as a CPU (or microcomputer), a RAM, a ROM, a storage / recording device, an electrical / information device including an IO, a computer, a server, and the like. You may implement with the form of the program to be made. 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 wireless device according to the present invention can ensure security functions such as misplacement and theft prevention in a wireless key having a laser pointer function, for example, and can achieve both convenience required for use situations. Electronic equipment can be provided.

The block diagram of the radio | wireless machine provided with the laser pointer function in embodiment of this invention The block diagram of the radio | wireless machine in the 1st Embodiment of this invention Communication sequence diagram in radio search mode according to the first embodiment of the present invention Communication sequence diagram in wireless authentication mode in the first embodiment of the present invention The figure which shows the message | telegram structure of the radio | wireless machine in the 1st Embodiment of this invention The block diagram of the radio | wireless machine provided with the laser pointer function provided with the mouse button in the 2nd Embodiment of this invention

Explanation of symbols

A, B Radio 1 First antenna 105 First time control means 106 First transmission / reception means 107 First authentication means 201 Second antenna 202 Second transmission / reception means 203 Second time control means 204 Second Authentication means

Claims (5)

In a wireless authentication system composed of a mobile terminal device and an electronic device,
The electronic device includes transmission / reception means for receiving a signal from a portable terminal device that is a wireless communication partner, and authentication means for restricting use when a reception level of the signal received by the transmission / reception means is equal to or lower than a first threshold. Prepared,
When authentication distance change request data is included in the signal transmitted from the portable terminal device, the authentication means has a reception level of the signal received by the transmission / reception means equal to or lower than a second threshold lower than the first threshold. Sometimes use restrictions,
The authentication distance change request data, the wireless authentication system characterized in that it contains information in which operation information indicating whether or not the operation buttons and switches the portable terminal device. Wireless authentication system 請 Motomeko 1 wherein that is part of the information indicating the priority of the process on a signal transmitted from the portable terminal device. Wireless authentication system 請 Motomeko 2 wherein that is part of the information indicating the change of the communication cycle on a signal transmitted from the portable terminal device. Mobile terminal device, any a first switch for turning on and off on the implementation of the function, the second switch and comprising Ru請 Motomeko 3 wherein the invalidating the first switch regardless on-off of the first switch Wireless authentication system . 5. The wireless authentication system according to claim 1, further comprising a function of notifying that a signal transmitted from the mobile terminal device includes authentication distance change request data.