JP2002300651A - System for preventing illegal use of portable information terminal using wrist watch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent illegal use when only a portable information terminal is acquired illegally by interlinking the portable information terminal and a wrist watch through radio communication. SOLUTION: A wrist watch 1 and a portable information terminal 2 are arranged to perform short distance radio communication through short distance radio communication interfaces 18 and 33. When transmission packets being transmitted periodically from the wrist watch 1 can not be received, the portable information terminal 2 requests user authentication. If normal user authentication is not inputted, the portable information terminal 2 performs power off processing thus preventing illegal use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for preventing unauthorized use of a portable information terminal such as a portable telephone, which can surely prevent unauthorized use by a third party.

[0002]

2. Description of the Related Art As a conventional system for preventing unauthorized use of a portable information terminal, a power-on password is set for the portable information terminal itself, and when a power-on is required, the password is required to be input. It is common to prevent unauthorized use.

[0003]

However, in the above-mentioned system for preventing unauthorized use of portable information terminals, a power-on password is set. A password entry is required at power-on, preventing unauthorized use.However, if the device is stolen or lost in the power-on state, the password is not required unless the power is turned off. There is an unresolved problem that unauthorized use is possible.

In order to solve this unresolved problem, a timer can be set in the portable information terminal to request the input of a password when the timer expires. The password is required more frequently due to time-up during use, which is bothersome, and if the timer setting is increased, the inconvenience will be resolved, but the time for unauthorized use when stolen or lost And there is an unsolved problem that unauthorized use cannot be reliably prevented.

Accordingly, the present invention has been made in view of the above-mentioned unsolved problems of the prior art. By making the portable information terminal and the wristwatch cooperate by wireless communication, only the portable information terminal can be illegally used. An object of the present invention is to provide a portable information terminal unauthorized use prevention system using a wristwatch that can reliably prevent unauthorized use when acquired.

[0006]

According to a first aspect of the present invention, there is provided a system for preventing unauthorized use of a portable information terminal using a wristwatch, wherein the wristwatch and the portable information terminal are periodically connected by short-range wireless communication. The portable information terminal is characterized by having authentication means for requesting user authentication when it becomes impossible to perform regular communication with the wristwatch.

In the invention according to the first aspect, the wristwatch and the portable information terminal periodically perform short-distance wireless communication with each other, and the portable information terminal periodically communicates with the wristwatch by the authentication means. When the portable information terminal and the wristwatch are out of the range where short-range wireless communication is possible by requesting user authentication such as an authentication password and biometric information when communication becomes impossible If the user cannot be authenticated, the portable information terminal cannot be used and unauthorized use can be reliably prevented.

According to a second aspect of the present invention, there is provided a portable information terminal unauthorized use prevention system using a wristwatch, wherein the wristwatch and the portable information terminal can be periodically communicated by short-range wireless communication. The terminal has authentication means for requesting user authentication when the terminal cannot perform regular communication with the wristwatch; arm detachment detecting means for detecting that the wristwatch has been removed from the arm; Communication stopping means for stopping communication with the portable information terminal when the detection means detects the arm detachment.

According to the second aspect of the present invention, in the configuration of the first aspect of the present invention, the wristwatch is provided with an arm detachment detecting means. By stopping the communication with the portable information terminal by the communication stopping means, the user is required to be authenticated by the portable information terminal, and illegal use can be reliably prevented.

Further, in the portable information terminal unauthorized use prevention system using a wristwatch according to the third aspect, in the invention according to the second aspect, the arm detachment detecting means includes a temperature change, a resistance change of a mounting surface, and a mounting surface. , A change in capacitance, a change in the amount of light reflected by the optical sensor, and a change in vibration. In the invention according to the third aspect, the detachment of the wristwatch from the wrist is accurately determined by any one of a temperature change, a resistance change of the mounting surface, a capacitance change of the mounting surface, a change in the amount of light reflected by the optical sensor, and a change in vibration. Can be detected.

According to a fourth aspect of the present invention, in the portable information terminal unauthorized use prevention system using a wristwatch according to any one of the first to third aspects, the authentication means sets an authentication password as user authentication. It is characterized by having such a configuration. According to the fourth aspect of the present invention, the user authentication is performed by setting the authentication password, so that the user authentication can be easily set.

Further, in the portable information terminal unauthorized use prevention system using a wristwatch according to claim 5, in the invention according to any one of claims 1 to 3, the authentication means performs user authentication as a fingerprint, an iris, a voiceprint, or the like. Characterized in that it is configured to use the biological information. According to the fifth aspect of the present invention, since biometric information such as a fingerprint, an iris, and a voiceprint is used for user authentication, it is difficult to copy authentication information, and reliable authentication can be performed.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a first embodiment of the present invention, in which a wristwatch 1 and a portable information terminal 2 such as a mobile phone or a mobile device have a short-range wireless communication whose communication range is limited to about 10 m or less. It is configured to be able to communicate.

The wristwatch 1 includes an oscillating circuit 11, a time counting circuit 12 for counting time based on an output signal of the oscillating circuit 11, a memory 13 for storing data necessary for clock display, and a clock circuit 12. An arithmetic processing unit 14 to which timekeeping information and data are input from the memory 13 and an operation signal from the operation unit 14 are input;
A display unit 16 composed of a liquid crystal display or the like to which the timing data calculated in 4 is supplied via the display control circuit 15;
An operation unit 17 for inputting correction of timekeeping data, an address of the portable information terminal is set as a destination address at predetermined time intervals, an own address is set as a source address, and an own ID is set in the data unit. A short-range wireless interface 18 for transmitting a transmission packet in which information is written at predetermined time intervals.

Here, the arithmetic processing unit 14 performs a packet transmission process shown in FIG. In this packet transmission process, first, in step S1, the timing information of the timing circuit 12 is read, and then the process proceeds to step S2 to determine whether the read timing information has passed a predetermined time (for example, 1 second) from the previous processing. If the predetermined time has not elapsed, the process waits until the predetermined time has elapsed. If the predetermined time has elapsed, the process proceeds to step S3, where the address of the portable information terminal is set as the transmission destination address, and the transmission source address is set. The transmission packet in which its own address is set as the address and its own ID information is written in the data portion is transmitted to the short-range wireless communication interface
8 and then return to step S1.

The short-range wireless communication interface 18
Uses, for example, a frequency hopping spread spectrum technique, and for example, a 2.4 GHz ISM (Industrial
It is configured to be able to transmit and receive communication packets using a Scientific Medical) band as a carrier frequency. further,
The portable information terminal 2 has an audio codec 23 to which a microphone 21 and a speaker 22 are connected, similarly to a normal mobile phone.
, Channel codec 24, and TDMA (Time
Division Multiple Accesses
s) The control unit 25, the demodulation circuit 26 and the modulation circuit 27,
A wireless RF transmitting / receiving unit 28, an antenna unit 29, a control device 30 for controlling them, a display unit 31 including a liquid crystal display or the like connected to the control device 30;
An operation unit 32 including an operation button for inputting data such as a telephone number to 0; It includes a distance wireless communication interface 33 and a power supply control circuit 34 for managing power on and power off of the portable information terminal 2.

Here, the control device 30 performs an authentication management process for managing user authentication shown in FIG. 3 in addition to performing control for exerting a mobile phone function. This authentication management process is executed as a timer interrupt process at predetermined time intervals (for example, 100 msec). First, in step S11, it is determined whether or not a transmission packet has been received by the short-range wireless communication interface 33. If received, step S12
Then, it is determined whether the ID information written in the data portion of the transmission packet is the preset ID information, and the ID information of the transmission packet matches the set ID information. To step S26, where the variables T,
After clearing N and t to "0" respectively, the timer interrupt processing is terminated.
If the result of the determination in step 11 is that the transmission packet has not been received, the process proceeds to step S13.

In step S13, the timer variable T is incremented by "1", and the process proceeds to step S14 to determine whether the timer variable T has exceeded a set value Ts corresponding to the transmission interval of the transmission packet of the wristwatch 1. Judge, T ≦ T
If s, the timer interrupt processing is terminated and T
If> Ts, the process proceeds to step S15, where the time variable T is cleared to “0”, and then proceeds to step S16, where the variable N representing the number of times a communication packet from the wristwatch 1 cannot be received is set to “1”. Then, the process proceeds to step S17 to determine whether or not the variable N has reached a preset set value Ns (for example, “3”).
When N <Ns, the timer interrupt processing is terminated as it is, and when N ≧ Ns, it is determined that the distance from the wristwatch 1 is more than the reception range of the short-range wireless communication interfaces 18 and 33 and the reception is not possible. And step S
The process proceeds to S18, where the variable N is cleared to “0”, and then proceeds to step S19.

In step S19, message information for prompting the user to enter an authentication password is displayed on the display unit 33 as user authentication. Then, the process proceeds to step S20 to determine whether or not the authentication password has been input from the operation unit 32. If the authentication password has not been entered, the process proceeds to step S21, in which the variable t representing the elapsed time is incremented by "1", and then the process proceeds to step S2.
Then, it is determined whether or not the variable t has exceeded a preset value ts. If t ≦ ts, the timer interrupt process ends, and if t> ts, the process proceeds to step S23.
Then, the variable t is cleared to "0", and then the process proceeds to step S25.

If the result of the determination in step S20 is that an authentication password has been input, the flow shifts to step S24 to determine whether or not the authentication password matches a preset authentication password. If they match, the timer interrupt process is terminated as it is, and if they do not match, the process proceeds to step S25. Step S2
At 5, the timer interrupt process is terminated after a power-off process request is sent to the power supply control circuit 34.

When the power switch of the operation unit 32 is turned on, the power control circuit 34 displays on the display unit 31 message information prompting the input of an authentication password when the current state is the power off state. When an authentication password that matches a previously set authentication password is input from the operation unit 32 within a predetermined period of time, power-on processing for supplying power to each constituent circuit is performed, and the current state is the power-on state. In the case of, the power-off process for shutting off the power supply to each component circuit immediately without requesting the authentication password is performed, and the control device 30
The power-off process is also performed when the power-off process request is received.

Next, the operation of the first embodiment will be described. Now, it is assumed that the wristwatch 1 is worn on the wrist, and the portable information terminal 2 in which an arbitrary password for authentication at the time of power-on is set in advance is in the power-off state. In this state, when the portable information terminal 2 turns on the power switch of the operation unit 32 to use the public telephone line, the power control circuit 34 prompts the display unit 31 to input a password for authentication. Is displayed. At this time, when the owner of the portable information terminal 2 operates the operation button provided on the operation unit 32 and inputs the authentication password, when the input authentication password matches the set authentication password. Then, power is supplied to each of the constituent circuits so that the mobile phone function can be used.

As described above, when the portable information terminal 2 enters the power-on state, the authentication management process of FIG. 3 is executed, and the wristwatch 1 receives a transmission packet transmitted at predetermined time intervals in the process of FIG. Is determined (step S1).
1) When a transmission packet is received, it is determined whether or not the ID information included in the packet matches the preset ID information (step S12). , N, and t are cleared to “0”, the timer interrupt process ends, and the power-on state is continued.

However, if the portable information terminal 2 is left behind or stolen in a state where the portable information terminal 2 is in the power-on state and cannot receive the transmission packet transmitted from the wristwatch 1, the processing in FIG. , Step S11
Then, the process goes to step S13 to increment the time variable T by "1". When the time variable T reaches the set value Ts, the variable N indicating the number of times of reception failure in which a transmission packet cannot be received is incremented by "1". When the variable N exceeds the set value Ns, message information for prompting the input of an authentication password is displayed on the display unit 31 (step S1).
9).

At this time, if a third person other than the legitimate holder of the portable information terminal 2 acquires the portable information terminal 2, it is not possible to input the set authentication password. If the authentication password is not input within a predetermined time or the input authentication password does not match the set authentication password, the power supply control circuit 34
, A power-off request is sent out, and power-off processing is performed by the power supply control circuit 34 to immediately shut off the power supplied to each component circuit. Therefore, unauthorized use by a third party other than the owner can be reliably prevented.

However, if the authorized owner forgets to place the wristwatch 1 when going out, after turning on the power,
Every time the variable N representing the number of times of non-reception exceeds the set value Ns, the message information prompting the input of the authentication password is displayed on the display unit 3.
Although it is displayed in 1, an authentication password that matches the set authentication password can be input, so that the power-on state can be continued.

As described above, in the first embodiment, transmission / reception of a transmission packet between the wristwatch 1 and the portable information terminal 2 is periodically performed, so that the portable information terminal 2
When it becomes impossible to receive the transmission packet from the wristwatch 1 in the above, the input of the authentication password is requested, and the authentication password is not input within the predetermined time or the input authentication password is set to the predetermined authentication. If the password does not match the password, a power-off request is sent to the power supply control circuit 34, and the power supply to each component circuit is immediately cut off. Can securely prevent the portable information terminal 2 from being illegally used.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, when the wristwatch 1 is detached from the wrist, unauthorized use of the portable information terminal 2 is prevented. That is, in the second embodiment, as shown in FIG. 4, the wristwatch 1 is provided with an arm detachment sensor 41 as arm detachment detection means for detecting detachment from the state of being attached to the arm.
The first detection signal is input to the arithmetic processing unit 14, and the arithmetic processing unit 14 has the same configuration as that of the above-described first embodiment except that the processing unit 14 performs the packet transmission process shown in FIG.

Here, the arm detachment sensor 41 is constituted by a body temperature sensor disposed on the arm mounting surface for detecting a body temperature. In the packet transmission process of FIG. 5, first, in step S31, the detection signal of the arm detachment sensor 41 is read,
Then, the process proceeds to step S32 to determine whether the detected body temperature is a set value (for example, 35 ° C. or more) corresponding to the body temperature.
Is determined to be detached from the arm and returns to step S31 without transmitting a transmission packet. When the detected body temperature is equal to or greater than the set value, it is determined that the wristwatch 1 is worn on the arm. Move to S33.

In this step S33, the timing information of the timing circuit 12 is read, and then the process proceeds to step S34.
It is determined whether or not the read timing information has passed a predetermined time (for example, 1 second) from the previous processing. If the predetermined time has not passed, the process waits until the time has passed. Then, the address of the portable information terminal is set as the transmission destination address, the transmission packet in which the own address is set as the transmission source address is transmitted to the short-range wireless communication interface 18, and the process returns to the step S31.

According to the second embodiment, when the authorized holder of the portable information terminal 2 wears the wristwatch 1 on his / her wrist, the body temperature detection value detected by the arm detachment sensor 41 of the wristwatch 1 is set. When the value is equal to or more than the value, in the packet transmission process of FIG. 5, the process proceeds to step S33 and thereafter, and similarly to the above-described first embodiment, by transmitting the transmission packet periodically, the portable information terminal 2 Is in the power-on state, the power-on state can be continued by receiving the transmission packet.

When the authorized holder of the portable information terminal 2 removes the wristwatch 1 from his / her wrist from the transmission state of the periodic transmission packet from the wristwatch 1, the detected body temperature detected by the arm detachment sensor 41 is up to that point. In the packet transmission process of FIG. 5, the state is changed from the state equal to or more than the set value to the state smaller than the setting equal to the ambient temperature.
Then, the process returns to step S1, and the periodic transmission of the transmission packet is stopped.

For this reason, in the portable information terminal 2, as in the case of the first embodiment described above, the distance between the portable information terminal 2 and the wristwatch 1 exceeds the communication range. When the variable N indicating the number of times of non-reception exceeds the set value Ns, a power-off request is sent to the power control circuit 34, whereby the power supply to each component circuit is cut off and the power is turned off. In addition, unauthorized use by a third party can be reliably prevented.

As described above, according to the second embodiment, the arm detachment sensor 41 is provided on the wristwatch 1 side, and when the arm detachment sensor 41 detects that the wristwatch 1 has come off the arm, the portable information terminal When the transmission of the transmission packet to the watch 2 is stopped, the transmission of the transmission packet via the short-range wireless communication interface 18 is stopped in a state where the wristwatch 1 is removed from the wrist. Unnecessary power consumption can be suppressed, and the life of the power supply battery of the wristwatch 1 can be extended.

Further, immediately after the authorized holder of the portable information terminal 2 removes the wristwatch 1 from his / her wrist, the transmission of the transmission packet is stopped, thereby preventing unauthorized use of the portable information terminal 2. Therefore, even when the wristwatch 1 and the portable information terminal 2 are left in the same place, unauthorized use by a third party can be reliably prevented. In the second embodiment, a case has been described in which the body temperature sensor is used as the arm detachment detection means. However, the present invention is not limited to this.
Apply a resistance sensor that detects the electrical resistance of the skin, a capacitance sensor that detects the capacitance of the mounting surface, an optical sensor that detects the amount of reflected light, a vibration sensor that detects vibration, etc. The detached state can be detected.

In the first and second embodiments, the case where the transmission packet is periodically transmitted from the wristwatch 1 has been described. However, the present invention is not limited to this. The transmission packet may be transmitted to the wristwatch 1, and when the wristwatch 1 receives the transmission packet from the portable information terminal 2, the transmission packet may be transmitted to the portable information terminal 2. In this case,
On the wristwatch 1 side, the portable information terminal 2 is powered on,
Since the transmission packet is transmitted only when the authentication management process is being executed, the power consumption required for the transmission / reception process on the wristwatch 1 side can be reduced.

Furthermore, in the first and second embodiments, the case where the portable information terminal 2 performs authentication using the authentication password has been described. However, the present invention is not limited to this case. Biometric information such as a fingerprint, an iris, and a voiceprint of a person are registered in the portable information terminal 2 in advance,
A biometric information detecting means for detecting biometric information corresponding to the registered biometric information may be provided, and the biometric information detecting means may detect the biometric information at the time of an authentication request. In this case, more reliable authentication may be performed. it can.

Further, in the first and second embodiments, the case where the ID information is included in the transmission packet has been described. However, the present invention is not limited to this. The wristwatch may be determined, in other words, it is only necessary that the portable information terminal 2 can recognize that the packet is a transmission packet from a specific wristwatch.

Further, in the first and second embodiments, the case where the ID information is directly written in the transmission packet has been described. However, the present invention is not limited to this. May be written, and the ID information encrypted by the portable information terminal 2 may be decrypted and authenticated. In this case, it becomes difficult for a third party to analyze the ID information, and the security function is not provided. Can be strengthened more.

[0040]

As described above, according to the first aspect of the present invention, a short-range wireless communication is periodically performed between the wristwatch and the portable information terminal, and the portable information terminal is authenticated. Means that the portable information terminal and the wristwatch can communicate with each other by short-distance wireless communication by monitoring regular communication with the wristwatch and requesting user authentication such as an authentication password and biometric information when communication becomes impossible. If the user authentication cannot be performed when the communication is out of the communicable range, the portable information terminal cannot be used, and the effect that unauthorized use can be surely prevented can be obtained.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the wristwatch is provided with the arm detachment detecting means. Is detected by the arm detachment detecting means, and communication with the portable information terminal is stopped by the communication stopping means, whereby user authentication is required at the portable information terminal, and the unauthorized use can be reliably prevented. Is obtained.

Further, according to the third aspect of the present invention, the detachment of the wristwatch from the wrist is determined by a change in temperature, a change in resistance of the mounting surface,
Changes in the capacitance of the mounting surface, changes in the amount of light reflected by the optical sensor,
The effect of being able to accurately detect any of the changes in vibration is obtained. Furthermore, according to the invention of claim 4, since the user authentication is performed by setting the authentication password, the effect that the user authentication can be easily set can be obtained.

According to the fifth aspect of the present invention, since biometric information such as a fingerprint, an iris, and a voice print is used for user authentication, it is difficult to copy authentication information, and secure authentication is performed. The effect that can be performed is obtained.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating an example of a packet transmission processing procedure executed by the arithmetic processing device of the wristwatch according to the first embodiment.

FIG. 3 is a flowchart illustrating an example of an authentication management procedure executed by the control device of the portable information terminal according to the first embodiment.

FIG. 4 is a schematic configuration diagram showing a second embodiment of the present invention.

FIG. 5 is a flowchart illustrating an example of a packet transmission processing procedure executed by the arithmetic processing device of the wristwatch according to the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wristwatch 2 Portable information terminal 11 Oscillation circuit 12 Timing circuit 13 Data memory 14 Arithmetic processing unit 15 Display control circuit 16 Display unit 18 Short-range wireless communication interface 21 Microphone 22 Speaker 23 Voice codec 24 Channel codec 25 TDMA control unit 26 Modulation unit 27 Demodulation unit 28 Wireless RF transmission / reception unit 29 Antenna 30 Control device 31 Display unit 32 Operation unit 33 Short-range wireless communication interface 34 Power control circuit 41 Arm detachment sensor

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) H04M 1/725 H04B 7/26 109R 109S F term (Reference) 5B019 GA03 HF10 5K027 AA11 BB09 HH27 5K067 AA32 BB04 DD27 EE02 EE03 EE35 EE37 GG01 GG11 HH24

Claims (5)

[Claims] 1. A wristwatch and a portable information terminal are configured to be able to periodically communicate with each other by short-range wireless communication, and the portable information terminal is configured to allow a user to periodically communicate with the wristwatch when the communication becomes impossible. A system for preventing unauthorized use of a portable information terminal using a wristwatch, comprising an authentication means for requesting authentication. 2. A wristwatch and a portable information terminal are configured to be able to periodically communicate with each other by short-range wireless communication. The wristwatch has authentication means for requesting authentication, the wristwatch detects arm detachment detecting that the wrist is removed from the arm, and communicates with the portable information terminal when the arm detachment is detected by the arm detachment detection means. A system for preventing unauthorized use of a portable information terminal using a wristwatch, comprising a communication stopping means for stopping the communication. 3. The arm detachment detecting means detects one or more of a change in temperature, a change in resistance of a mounting surface, a change in capacitance of a mounting surface, a change in the amount of light reflected by an optical sensor, and a change in vibration. The system for preventing unauthorized use of a portable information terminal according to claim 2, characterized in that: 4. The portable information terminal unauthorized use prevention system according to claim 1, wherein said authentication means is configured to set an authentication password as user authentication. 5. The portable information according to claim 1, wherein said authentication means is configured to use biometric information such as a fingerprint, an iris, and a voiceprint as user authentication. Terminal unauthorized use prevention system.