JP2007336082A - System, apparatus, and method for information processing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an Information processing system, an information processing apparatus, and an information processing method. <P>SOLUTION: An information processing system 10 comprises a sensor device 100 for detecting a state about a specific circumstance, and outputting the state as a state signal and a communication device for operating based on the output of the sensor device. The communication device comprises a signal input portion receiving the state signal inputted from the sensor device, and a bit sequence generator for generating a bit sequence of a predetermined length based on the state signal inputted into the signal input portion. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an information processing system, an information processing apparatus, and an information processing method.

  In recent years, a sensor network formed by a large number of sensor devices having a wireless communication function has been proposed. Wireless communication terminal devices that form a sensor network are generally developed with an emphasis on low cost, and therefore are often very poor in computing ability compared to computer devices and the like. In order to encrypt and authenticate information transmitted and received between these many wireless communication terminal devices, it is necessary to set key information for encryption and authentication in each wireless communication terminal device. How to set the key information in these many wireless communication terminal devices is a big problem.

  As the method for safely setting the key information, there are various modes such as a method for manual setting by the user, a method for delivering key information by wired connection to a management device such as a server, and a method for using wireless communication. Conceivable.

  Of these methods, the method of manual setting by the user and the method of distributing key information by wired connection require that the key information be sequentially set in a large number of wireless communication terminal devices, which places a heavy load on the user. On the other hand, since the method using wireless communication uses wireless communication with a high degree of freedom for setting key information, the user is not burdened with sequentially setting key information in a large number of wireless communication terminal devices. However, it is necessary to prevent a third party's device from intercepting wireless communication and intercepting key information illegally.

  For example, a Diffie-Hellman key exchange method is a method for safely delivering key information using wireless communication even if a third party terminal in the vicinity intercepts the wireless communication. A key exchange method based on the public key method is known. However, since these methods have a large calculation amount, there is a problem that it is difficult to mount them on a wireless communication terminal device with poor calculation capability.

  On the other hand, as a technique that can cope with such a problem, for example, Patent Document 1 discloses a method for distributing an initial key using wireless communication. More specifically, the fixed base station that has received the initial key registration request transmitted by the wireless communication terminal apparatus is strong enough to communicate with the wireless output of the fixed base station only in the immediate vicinity of the fixed base station. And a method for issuing an initial key to a wireless communication terminal device that has transmitted an initial key registration request.

JP-A-2005-79975

  However, in the conventional key distribution method, due to the characteristics of wireless communication, the range in the vicinity of the pole cannot be clearly drawn. Therefore, the key information or the bit string is intercepted by an unauthorized third party terminal device existing around the wireless network system. There was a risk of being.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is a novel and capable of generating a bit string of a predetermined length without requiring complicated calculation processing. An object is to provide an improved information processing system, information processing apparatus, and information processing method.

  In order to solve the above-described problem, according to an aspect of the present invention, based on a sensor device that detects a state related to a specific event in the vicinity and outputs the state as a state signal, and a state signal output by the sensor device An information processing system including an information processing apparatus that processes information, wherein the information processing apparatus is configured based on a signal input unit to which a state signal is input from the sensor device and a state signal input to the signal input unit. There is provided an information processing system comprising a bit string generation unit that generates a bit string of a length.

  According to such a configuration, since the sensor device generates the state signal based on the state of a specific event that changes irregularly around the sensor device, the state signals generated at different times and environments are not identical. Become. Further, the information processing apparatus generates a bit string based on the state signal. Therefore, the bit string can be used as random number information without providing a complicated random number generation function in the information processing apparatus.

  The information processing device includes a transmission / reception unit that transmits / receives information to / from another information processing device, an authentication information generation unit that generates predetermined authentication information and transmits the authentication information to the other information processing device via the transmission / reception unit, A confirmation unit that receives response information for authentication information from another information processing device via the transmission / reception unit and confirms whether the other information processing device has generated the same bit string as itself based on the response information; It may be further provided.

  According to this configuration, each authentication information generation unit of the plurality of information processing devices generates authentication information and transmits the authentication information to the other information processing device via the transmission / reception unit. The other information processing apparatus generates response information based on the authentication information, and transmits the response information to the information processing apparatus that is the transmission source of the authentication information. Therefore, the confirmation unit of the plurality of information processing apparatuses receives the response information via the transmission / reception unit, and confirms whether or not the same bit string is generated between the plurality of information processing apparatuses based on the response information. be able to.

  In order to solve the above-described problem, according to another aspect of the present invention, a signal to which a state signal is input from a sensor device that detects a state related to a specific event around and outputs the state as a state signal. An information processing apparatus is provided, comprising: an input unit; and a bit string generation unit that generates a bit string of a predetermined length based on a state signal input to the signal input unit.

  According to such a configuration, the information processing apparatus can generate a bit string having a predetermined length based on a state signal corresponding to a state related to a specific event around that is detected by the sensor device. Therefore, the information processing apparatus can generate a bit string with extremely low reproducibility without providing special random number generation means.

  A transmission / reception unit that transmits / receives information to / from another information processing device, an authentication information generation unit that generates predetermined authentication information and transmits the authentication information to the other information processing device via the transmission / reception unit, and another information processing device It is also possible to further include a confirmation unit that receives response information for the authentication information from the transmission / reception unit and confirms whether another information processing apparatus has generated the same bit string as itself based on the response information. .

  According to this configuration, each authentication information generation unit of the plurality of information processing devices generates authentication information and transmits the authentication information to the other information processing device via the transmission / reception unit. The other information processing apparatus generates response information based on the authentication information, and transmits the response information to the information processing apparatus that is the transmission source of the authentication information. Therefore, the confirmation unit of the plurality of information processing apparatuses receives the response information via the transmission / reception unit, and confirms whether or not the same bit string is generated between the plurality of information processing apparatuses based on the response information. be able to.

  The storage unit may further include a storage unit, and the storage unit may store the bit sequence when the verification unit confirms that the bit sequence generated by itself and another information processing apparatus is the same. With this configuration, the information processing apparatus can read and use a bit string generated in the past in the information processing apparatus in accordance with the purpose and application.

  The bit string stored in the storage unit may be used as key information when transmitting / receiving predetermined information to / from another information processing apparatus. According to such a configuration, between information processing devices that share the same bit string, one information processing device transmits data encrypted using the bit string to the other information processing device, and the other information processing device The encrypted data can be decrypted using the bit string.

  The bit string may be a status signal binarized with a predetermined threshold as a boundary. According to such a configuration, it is possible to suppress the data capacity of the state signal input to the signal receiving unit and improve the communication efficiency between the sensor device and the information processing device.

  The bit string generation unit divides the binarized state signal with a predetermined threshold as a boundary, counts the number of bits of the first value or the second value included in each division, and outputs the count value May be converted into a binary number to generate a bit string. According to this configuration, the predetermined threshold value and interval can be set as appropriate. Therefore, even if a third-party information processing device exists in the same environment as a certain user's information processing device group, the bit string generated by the third-party information processing device in the certain user's information processing device. And a different bit string can be generated.

  The status signal input to the signal input unit may be in a digital format. According to such a configuration, the state signal input to the signal input unit can be directly used to generate a bit string without providing an A / D conversion unit in the information processing apparatus.

  The state signal input to the signal input unit is in an analog format, and may include a digital signal conversion unit that converts the state signal into a digital format and outputs the digital signal to the bit string generation unit. According to this configuration, the bit string generation unit generates a bit string of a predetermined length based on the digitally converted state signal by digitally converting the state signal input to the signal input unit by the digital signal conversion unit. be able to.

  In order to solve the above problem, according to another aspect of the present invention, a state signal is detected from a sensor device that detects a state related to a specific event in the surroundings and outputs the state as a state signal. There is provided an information processing method including an input step and a step in which an information processing device generates a bit string having a predetermined length based on a status signal.

  According to the information processing method having such a configuration, it is possible to generate a bit string having a predetermined length based on a state signal corresponding to a state related to a specific event in the vicinity detected by the sensor device. Therefore, according to the information processing method, a bit string with extremely low reproducibility can be generated as a random number without including a special random number generation step.

  A step of confirming whether or not another information processing apparatus has generated the same bit string as itself; and a step of storing a bit string when confirming that another information processing apparatus has generated the same bit string as itself; and May be included. According to such a configuration, each information processing apparatus checks whether or not the same bit string is generated in a plurality of information processing apparatuses under the same environment, and when the same bit string is generated, each information processing apparatus Stores the bit string. Therefore, the same bit string can be shared as random number information in a plurality of information processing apparatuses in the same environment.

  As described above, according to the present invention, there are provided an information processing system, an information processing apparatus, and an information processing method capable of generating a bit string having a predetermined length without requiring complicated calculation processing.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

(First embodiment)
First, an information processing system according to the first embodiment of the present invention will be described.

  FIG. 1 is a block diagram illustrating a configuration of an information processing system 10 according to the present embodiment. The information processing system 10 includes a sensor device 100 and a communication terminal device 200 as an information processing device.

  The sensor device 100 includes a detection unit 110, a state signal generation unit 120, and a digital signal output unit 130. As the sensor device 100, for example, a human (thing) sensor that senses the presence of a person or an object, a vibration sensor that senses vibration, a gas component sensor that senses a component in gas, an optical sensor that senses light, infrared light, or body temperature Infrared sensor that detects sound, sound sensor that detects sound, and wind direction / wind speed sensor that detects wind direction and wind speed.

  The detection unit 110 detects a state or a state value related to a specific event around. For example, a state or a state value such as the magnitude of ambient vibration, the brightness of light, the loudness of sound, and the wind direction / wind speed is detected.

  The state signal generation unit 120 generates a state signal based on the state detected by the detection unit 110. The state signal in the present embodiment is a digital signal generated based on the state value detected by the detection unit 110. However, the state signal generation unit 120 does not necessarily accurately reflect the magnitude of the state value in the state signal, and generates a binarized state signal depending on whether the state value exceeds a predetermined boundary. It is good.

  The digital signal output unit 130 outputs the state signal generated by the state signal generation unit 120 to the communication terminal device 200.

  In this embodiment, the case where the status signal output from the digital signal output unit 130 is in the digital format will be described as an example. However, the digital signal output unit 130 can also output the status signal in the analog format. The analog state signal is a signal whose value continuously changes with respect to the state value when the state or state value detected by the detection unit 110 is continuously changed.

  In the sensor device 100, even if the state or the state value detected by the detection unit 110 is in analog form, the output state signal may be a digital signal having a discrete numerical value or sign form. In this case, the numerical value of the state signal is not important, and may be information indicating whether the state value is higher or lower than a certain level. For example, this corresponds to the case where the ambient brightness is compared with a predetermined brightness standard and the illumination is turned on or off. On the other hand, the state detected by the detection unit 110 may be in one of two states, that is, in a digital format. For example, this corresponds to the case where the detection unit 110 detects whether there is paper in the printer.

  Examples of digital status signals output from the sensor device 100 include information on whether or not there is an object at a certain location, information on whether or not there is vibration, and in the gas, depending on the type of the sensor device. Information on whether or not a certain component is included, information on whether or not lighting is on, information on whether or not a person is approaching or moving away, information on whether or not a sound of a certain level or higher is heard, and a certain direction with the wind direction Information on whether or not the vehicle is facing or information on whether or not a certain amount of wind is blowing.

  The communication terminal device 200 includes a digital signal input unit 210, a random number information generation unit 220, a random number information match confirmation unit 230, a transmission unit 240, a reception unit 250, and a random number sharing unit 260. The communication terminal device 200 may have a lower information processing capability than an information processing device such as a PC (Personal Computer) or a mobile phone. Specifically, a device with low information processing capability is assumed to be a device equipped with a CPU (number of bits, number of clocks) with low processing capability and a storage device (ROM, RAM) with low capacity.

  The digital signal input unit 210 functions as a signal input unit, and a digital status signal is input from the digital signal output unit 130 of the sensor device 100. The digital signal input unit 210 outputs the input state signal to the random number information generation unit 220.

  The random number information generation unit 220 as an example of the bit string generation unit is a random number information (from the information “1” as the first value or “0” as the second value given from the digital signal input unit 210. Bit sequence). For example, the random number information generation unit 220 has a built-in timer, and can generate a bit string from a digital status signal obtained at certain intervals. It is also possible to generate a bit string by binary conversion of the count value indicating how many "0" or "1" status signals are obtained at a certain time interval. It is also conceivable to generate a new bit string by connecting bit strings generated from a plurality of the count values.

  In addition, the random number information generation unit 220 sets a threshold value at a time when the digital status signal is continuously “0” or “1”, and “0” is shorter than the threshold value, and “1” is longer. It is also possible to generate a bit string by defining: The start / end of generation of these bit strings may be performed by some external trigger or communication command.

  In addition, the generation of the bit string may end when the system generates a bit string of a specified length. The random number information generation unit 220 outputs the generated random number information (bit string) to the random number information match confirmation unit 230. Hereinafter, specific examples of random numbers generated by the random number information generation unit 220 will be described with reference to FIGS.

  FIG. 2 is an explanatory diagram illustrating a state in which the random number information generation unit 220 generates random number information based on sound waves detected by a sound sensor device as an example of the sensor device 100. The horizontal axis of the graph in FIG. 2 represents time, and the vertical axis represents the amplitude of the sound wave.

  The detection unit 110 of the sound sensor device detects the amplitude or waveform of a sound wave having periodicity, as shown in the graph of FIG. Subsequently, in the state signal generation unit 120, the amplitude value of the sound wave is sampled at a predetermined interval, and the digital signal output unit 130 outputs the amplitude value to the communication terminal device 200.

  The random number information generation unit 220 receives the amplitude value via the digital signal input unit 210, determines whether each of the amplitude values is larger or smaller than a preset boundary value, and determines the amplitude value. Is binarized. The random number information generation unit 220 associates “1” when the sampled amplitude value is larger than the boundary value, and associates “0” when the sampled amplitude value is smaller than the boundary value. A bit string identical to the number can be generated.

  In the illustrated example, since the sampling value of the first amplitude exceeds the boundary value, “1” is associated, but since the sampling value of the next amplitude is below the boundary value, “0” is associated. The same processing is performed thereafter, and it can be understood that a bit string consisting of “101100001011000010” is obtained from the illustrated sound wave.

  The bit string may be generated by the state signal generation unit 120 of the sensor device 100 and output to the communication terminal device 200. With this configuration, the amount of data output from the digital signal output unit 130 to the digital signal input unit 210 can be reduced. Here, when the bit string is used as it is as a random number, the random number information generation unit 220 extracts a bit string having a predetermined length between a predetermined start point and an end point. Further, the binarized bit string may be further converted as shown in FIG.

  FIG. 3 is an explanatory diagram showing an example of a random number generation method by the random number information generation unit 220. FIG. 3A shows a bit string of binarized amplitude values. The random number information generation unit 220 divides the bit string into, for example, every 8 bits, counts the number of bits whose value is “1” in each division, and converts the count value into a binary number as shown in FIG. Random number information can be generated.

  In the example shown in FIG. 3, since the first 8 bits of the binarized amplitude value bit string include three bits having a value of “1”, “011” obtained by binary-converting “3”. Is obtained. Similarly, since there are three bits having a value of “1” in the next 8 bits of the binarized amplitude value bit string, “011” obtained by binary conversion of “3” is obtained. Therefore, as a whole, the random number information generation unit 220 generates a bit string consisting of “011011” based on FIG. That is, since surrounding events such as sound and wind speed change irregularly every moment, a bit string generated based on the sound and wind speed can be regarded as random number information.

  In the above description, from the viewpoint of clarity of explanation, the example in which the number of bits of the random number generated by the random number information generation unit 220 is 6 bits or 18 bits has been described, but the number of bits is 128 bits, 256 bits, 1024 bits, etc. Depending on the purpose and application, it can be varied over a wide range.

  Returning to the description of FIG. 1, the random number information match confirmation unit 230 includes a function as an authentication information generation unit to be described later, and determines whether or not the same random number information as other communication terminal devices can be generated based on the authentication information. Functions as a confirmation unit for confirmation. As the confirmation method, for example, mutual authentication using a challenge / response method is conceivable.

  More specifically, the random number information coincidence confirmation unit 230 generates challenge information as authentication information when confirming whether or not the same random number information as that of other communication terminal apparatuses has been generated. The challenge information is transmitted to the communication terminal device. And the response information as response information which was produced | generated based on challenge information in the other communication terminal device and was transmitted toward self is received via the receiving part 250. FIG. Subsequently, the random number information coincidence confirmation unit 230 confirms whether or not the other communication terminal device has generated the same random number information as itself based on the received response information.

  Also, the random number information match confirmation unit 230 receives challenge information generated by another communication terminal device via the reception unit 250. Then, the random number information match confirmation unit 230 generates response information corresponding to the challenge information, and transmits the response information to another communication terminal device that is the transmission source of the challenge information via the transmission unit 240. Thereafter, the response information is used for the process of confirming the coincidence of random number information in the other communication terminal device.

  Examples of the challenge information and response information exchanged in the authentication process include ID information (unique address information) uniquely given to the communication terminal device 200, authentication random number information generated separately from the random number information, or Information obtained by converting ID information or authentication random number information using the random number information is given.

  When the random number information match confirmation unit 230 confirms that the same random number information as that of the other communication terminal device is generated by the random number information generation unit 220, the random number information match confirmation unit 230 outputs the generated random number information to the random number information sharing unit 260. When the same random number information as that of other communication terminal devices is not generated by the random number information generation unit 220, the random number information match confirmation unit 230 discards the generated random number information, and again returns the random number information to the random number information generation unit 220. May be instructed.

  The random number information sharing unit 260 is an example of a storage unit, and stores or stores the random number information output from the random number information match confirmation unit 230. The random number information stored in the random number information sharing unit 260 may be used as key information for encryption / authentication of information communicated with other communication terminal devices, for example.

  The transmission unit 240 transmits various information for confirmation of random number information match input from the random number information match confirmation unit 230 to another communication terminal device, and the reception unit 250 receives random number information input from the other communication terminal device. It receives various information for confirmation of matching and functions as a transmission / reception unit.

  As described above, since the random number information generation unit 220 generates random number information based on the state of a certain event detected by the sensor device 100, the random number information generation units 220 of a plurality of communication terminal devices have the same random number information. In order to generate, it is necessary that a plurality of communication terminal devices are arranged in the same environment. The same environment will be described with reference to FIG. 4 and FIG.

  FIG. 4 is an explanatory diagram showing a state relating to a plurality of communication terminal devices and sound waves around them. Around the communication terminal devices 201 and 202 connected to the sound sensor, there are a sound source 1, a sound source 2 and a sound source 3, and the sound wave arrival ranges 1 to 3 are indicated by dotted lines.

  In the example shown in FIG. 4, communication terminal apparatuses 201 and 202 are all located in the overlapping region of sound wave arrival ranges 1 to 3 of sound source 1, sound source 2, and sound source 3. Therefore, since the states regarding the sound waves around the communication terminal devices 201 and 202 are approximate, it is highly possible that both generate the same random number information.

  FIG. 5 is another explanatory diagram showing a state relating to a plurality of communication terminal devices and sound waves around them. There are sound source 1, sound source 2, sound source 3 and sound source 4 around communication terminal devices 201 to 208 connected to the sound sensor and communication terminal device 209 connected to the optical sensor. 4 is indicated by a dotted line.

  In the example illustrated in FIG. 5, the communication terminal devices 201 to 207 detect sound waves emitted from the sound source 1, the sound source 2, and the sound source 3 in common, and thus are highly likely to generate the same random number information. However, the communication terminal device 208 is not included in the sound wave arrival ranges 1 to 3 of the sound source 1, the sound source 2, and the sound source 3, and generates random number information based only on sound waves emitted by the sound source 4. The same random number information cannot be generated.

  In addition, the communication terminal device 209 is the same as the communication terminal devices 201 to 207 in the communication terminal device 209 because the sensor device to be connected is an optical sensor and is different from the sound sensor to which the communication terminal devices 201 to 208 are connected. Random number information cannot be theoretically generated.

  Thus, communication terminal devices that can generate the same random number information are limited to those that are connected to the same type of sensor device and are in the same environment with respect to specific events detected by the sensor device.

  Next, the operation of the communication terminal device 200 according to the present embodiment will be described with reference to FIG.

  FIG. 6 is a flowchart showing an operation flow of the communication terminal apparatus 200 according to the present embodiment. First, the communication terminal device 200 receives a digital status signal input from the sensor device 100 (S400). Then, the communication terminal device 200 generates random number information based on the input state signal (S404). Here, the random number information generation unit 220 of the communication terminal device 200 monitors, for example, information “0” or “1” input via the digital signal input unit 210 and continuously “1” for an arbitrary time or longer. ”Or“ 0 ”to generate a bit with a value of“ 0 ”, otherwise generate a bit with a value of“ 1 ”and concatenate the generated bits to Random number information including a bit string having a bit length can be generated.

  Next, the communication terminal apparatus 200 performs confirmation processing to determine whether or not the same random number information as that of the other communication terminal apparatus has been generated (S408). As the confirmation method, a challenge / response method is conceivable, but the details are as described with reference to FIG.

  Further, when the communication terminal device 200 determines that the same random number information has been generated by itself and another communication terminal device as a result of the confirmation processing in S408 (S412), the communication terminal device 200 stores the generated random number information (S416). If it is determined that the same random number information could not be generated by itself and another communication terminal device, the process returns to S400 and the random number information generation process is performed again.

  As described above, the communication terminal device 200 according to the first embodiment of the present invention can generate random number information using the digital status signal output from the sensor device 100. According to this configuration, it is possible to generate and share the same random number information only between a plurality of communication terminal devices in a state where a specific event state is approximate or under the same environment (sensing environment). Therefore, the same key information can be collectively set for communication terminal devices sharing a sensing environment without sequentially setting key information for a large number of communication terminal devices forming a sensor network.

  That is, since a communication terminal device that does not share a sensing environment cannot generate the same random number information as a communication terminal that shares a sensing environment, only the communication terminal device that shares the sensing environment generates secret random number information for a third party. Is possible.

  In the above description, the communication terminal device 200 that operates based on the sensor device 100 that detects sound waves has been described as an example. However, the function of the communication terminal device 200 is not limited to this, and referring to FIG. As described, it may function based on the state of other events.

  FIG. 7 is an explanatory diagram showing an example of a communication terminal device connected to the infrared sensor device. FIG. 7 shows communication terminal devices 281 to 288 connected to eight infrared sensor devices and a communication terminal device 289 connected to one other sensor device. Here, since an infrared sensor detects the body temperature which a biological body emits, it can detect the approach of a biological body.

  In the example shown in FIG. 7, the infrared detection ranges of the communication terminal devices 281 to 287 are common, and the body temperature emitted from the living body 1, 2, 3 can be detected, and the approach of the living body can be detected. On the other hand, the communication terminal device 288 can detect only the approach of the living body 1.

  Accordingly, since the digital status signals input to the communication terminal devices 281 to 287 sharing the sensing environment are common, the communication terminal devices 281 to 287 can theoretically generate and share the same random number information. it can. On the other hand, the communication terminal device 288 that detects only the approach of the living body 1 and the communication terminal device 289 that does not include a sensor device common to the seven communication terminal devices 281 to 287 are the communication terminal devices 281 to 287 and the sensing environment. Since they are different, the same random number information cannot be generated with the seven communication terminal devices 281 to 287.

  As described above, the sensor device applicable to the present embodiment is not limited to the sound wave sensor, and any sensor device capable of detecting the state of surrounding events such as an infrared sensor, an optical sensor, and a vibration sensor can be applied.

(Second embodiment)
Next, an information processing system according to the second embodiment of the present invention will be described. The communication terminal device constituting the information processing system according to this embodiment is different from the first embodiment in that an analog state signal is input from the sensor device. Hereinafter, the information processing system according to the present embodiment will be described by extracting differences from the first embodiment.

  FIG. 8 is a block diagram showing the configuration of the information processing system 10 according to the present embodiment. The information processing system 10 includes a sensor device 100 and a communication terminal device 200. The sensor device 100 includes a detection unit 110, a state signal generation unit 120, and an analog signal output unit 140.

  The state signal generation unit 120 generates an analog state signal based on a state related to a specific event around that is detected by the detection unit 110. The generated analog signal may be a direct-current voltage or current, which is an amount that can be accurately measured, or a frequency-modulated signal.

  The state signal generated by the state signal generation unit 120 includes, for example, temperature information measured by a temperature sensor, humidity information measured by a humidity sensor, perspective information of infrared rays (body temperature) measured by an infrared sensor, and a pulse sensor. Measured pulse rate information, frequency information of music and human voice measured by sound (frequency) sensor, brightness information measured by illuminance sensor, wind speed information or wind direction information measured by wind direction / wind speed sensor, infrared The distance information to the object measured by the reflected light is given.

  The analog signal output unit 140 outputs the analog signal generated by the state signal generation unit 120 to the communication terminal device 200.

  The communication terminal device 200 includes an analog signal input unit 212, a digital signal conversion unit 216, a random number information generation unit 220, a random number information match confirmation unit 230, a transmission unit 240, a reception unit 250, and a random number sharing unit 260.

  The digital signal conversion unit 216 receives an analog status signal generated by the sensor device 100 via the analog signal input unit 212 and converts the status signal into a digital format. For the conversion from an analog signal to a digital signal, for example, a continuous value of an analog state signal or an estimated value of an input signal is sampled, and the sampling value is expressed in binary, or a principal component value of a frequency converted signal May be converted into a digital value by expressing it as a binary number. The digital signal conversion unit 216 outputs the state signal converted into the digital format to the random number information generation unit 220.

  The random number information generation unit 220 decreases “1” when the bit value of an arbitrary bit of the status signal in the digital format input from the digital signal conversion unit 216 increases compared to the preceding and subsequent bit values. In this case, digital conversion may be performed in association with “0”. The digital signal conversion unit 216 outputs the state signal converted into the digital format to the random number information generation unit 220.

  Since the functions and configurations of the random number information generation unit 220, the random number information match confirmation unit 230, the transmission unit 240, the reception unit 250, and the random number sharing unit 260 are substantially the same as the contents described in the first embodiment, Description is omitted.

  Next, the operation of the communication terminal apparatus 200 according to the present embodiment will be described with reference to FIGS. 9 and 10.

  FIG. 9 is an explanatory diagram showing a state relating to the communication terminal devices 291 and 292 connected to the wind speed sensor and the surrounding wind. It is assumed that the communication terminal devices 291 and 292 have a common wind detection range in which wind can be detected, and winds 1 to 3 blow around in order. In addition, the arrows of the winds 1 to 3 in the illustrated example represent the vectors of the winds 1 to 3, and indicate a state in which the winds 1 to 3 are blowing at least at the positions indicated by the arrows.

  FIG. 10 is an explanatory diagram showing a flow of operations of the communication terminal devices 291 and 292 connected to the wind speed sensor as an example of the communication terminal device 200 according to the present embodiment. First, the communication terminal apparatuses 291 and 292 sequentially input the wind speed values of the winds 1 to 3 measured by the connected wind speed sensor via the analog signal input unit 212 (S450).

  Then, the digital signal conversion unit 216 performs processing for converting the wind speed values of the winds 1 to 3 as the state signals input to the analog signal input unit 212 into a binary digital format (S454). Next, the random number information generation unit 220 generates random number information including a bit string having a prescribed bit length based on the wind speed values of the winds 1 to 3 converted into the digital format (S458).

  Furthermore, the random number information match confirmation unit 230 of each of the communication terminal apparatuses 291 and 292 performs a confirmation process as to whether or not the random number information generation unit 220 of each of the communication terminal apparatuses 291 and 292 has generated the same random number information ( S462). An example of the confirmation process is the challenge / response method described in the first embodiment.

  Further, each of the communication terminal devices 291 and 292 stores the generated random number information when it is determined that the same random number information can be generated by itself and another communication terminal device as a result of the confirmation processing in S462 (S466). (S470). If it is determined that the same random number information could not be generated by itself and another communication terminal device, the process returns to S450 and the random number information generation process is performed again. However, in the example illustrated in FIG. 9, the communication terminal apparatuses 291 and 292 are in an environment where winds 1 to 3 can be detected in common, that is, in the same sensing environment, and thus may generate the same random number information. high.

  On the other hand, as in the first embodiment, the same random number information cannot be generated between communication terminal devices that do not share a sensing environment. This is shown in FIG.

  FIG. 11 is an explanatory diagram showing a state relating to a plurality of communication terminal devices and the surrounding wind. FIG. 11 shows communication terminal devices 291 to 298 connected to eight wind speed sensor devices and a communication terminal device 299 connected to one other sensor device.

  In the example illustrated in FIG. 11, the wind detection ranges of the communication terminal devices 291 to 297 are common, and the wind speeds of the winds 1 to 3 can be detected. Accordingly, since the sensing environments of the communication terminal devices 291 to 297 are similar or the same, the communication terminal devices 291 to 297 can theoretically generate the same random number information and share the random number information.

  On the other hand, the communication terminal device 298 cannot detect the winds 1 to 3 because the shielding object 300 exists between the communication terminal devices 291 to 297. As a result, the random number information generated by the communication terminal device 298 is different from the random number information generated by the communication terminal devices 291 to 297.

  Further, the communication terminal device 299 connected to a sensor device other than the wind speed sensor device cannot detect the winds 1 to 3, and therefore cannot generate the same random number information as the random number information generated by the communication terminal devices 291 to 297. .

  As described above, the communication terminal device 200 according to the second embodiment of the present invention digitally converts the analog state signal output from the sensor device 100 and uses the digitally converted state signal. Random number information can be generated. According to such a configuration, it is possible to generate and share the same random number information only between a plurality of communication terminal devices sharing a sensing environment. Therefore, the same key information can be collectively set for communication terminal devices sharing a sensing environment without sequentially setting key information for a large number of communication terminal devices forming a sensor network.

  That is, since the communication terminal device that does not share the sensing environment cannot generate the same random number information as the communication terminal device that shares the sensing environment, only the communication terminal device that shares the sensing environment provides secret random number information to the third party. It is possible to generate.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, in the first and second embodiments described above, each communication terminal device has been described using an example in which one sensor device is used, but the present invention is not limited to this example, and each communication terminal device Random number information may be generated using a plurality of sensor devices. According to this configuration, each communication terminal apparatus generates random number information based on state values related to a plurality of surrounding events. Therefore, for example, even if the communication terminal devices arranged at different positions accidentally detect the same sound wave, the same random number information cannot be generated unless the same wind speed is detected. it can.

  In the first and second embodiments, the example in which each communication terminal device uses one sensor device has been described. However, the present invention is not limited to such an example, and there is one communication terminal device. The above sensor devices may be shared, and random number information may be generated using output signals from the sensor devices. According to such a configuration, when each communication terminal device and one sensor device are connected independently, each communication terminal device generates the same random number due to subtle differences in the position and performance of each sensor device. The problem of not being able to be prevented can be prevented.

  In the first and second embodiments, the communication terminal device that generated the random number information has been described as an example of confirming the coincidence of the random number information with other communication terminal devices, but the present invention is not limited to such an example. In addition, it is not necessary to check the match of the random number information, or a device for checking the match of the random number information may be provided separately.

  Furthermore, in the first and second embodiments, the example in which a plurality of communication terminal devices sharing a sensing environment share random number information has been described. However, the present invention is not limited to this example, and each communication terminal device generates The random number information thus made may not be shared with other communication terminal devices, but simply used as random number information.

It is the block diagram which showed the structure of the information processing system concerning 1st embodiment of this invention. It is explanatory drawing which showed a mode that the random number information generation part concerning the embodiment produced | generated random number information based on the sound wave detected by the sound sensor apparatus. It is explanatory drawing which showed an example of the random number generation method by the random number information generation part concerning the embodiment. It is explanatory drawing which showed the state regarding the some communication terminal device concerning the embodiment, and the surrounding sound wave. It is the other explanatory view showing the state about the plurality of communication terminal devices concerning the embodiment, and the sound wave of the circumference. It is the flowchart which showed the flow of operation | movement of the communication terminal device concerning the embodiment. It is explanatory drawing which showed an example of the communication terminal device connected with the infrared sensor apparatus concerning the embodiment. It is the block diagram which showed the structure of the information processing system concerning 2nd embodiment of this invention. It is explanatory drawing which showed the state regarding the communication terminal device connected with the wind speed sensor concerning the embodiment, and the surrounding wind. It is explanatory drawing which showed the flow of operation | movement of the communication terminal device connected with the wind speed sensor concerning the embodiment. It is explanatory drawing which showed the state regarding the some communication terminal device concerning the embodiment, and the wind around it.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Information processing system 100 Sensor apparatus 110 Detection part
DESCRIPTION OF SYMBOLS 120 Status signal generation part 130 Digital signal output part 200 Communication terminal device 210 Digital signal input part
212 analog signal input unit 216 digital signal conversion unit 220 random number information generation unit 230 random number information match confirmation unit 240 transmission unit 250 reception unit 260 random number information sharing unit

Claims (12)

An information processing system comprising a sensor device that detects a state related to a specific event around and outputs the state as a state signal, and an information processing device that processes information based on the state signal output by the sensor device There:
The information processing apparatus includes:
A signal input unit to which the state signal is input from the sensor device;
A bit string generation unit that generates a bit string of a predetermined length based on the state signal input to the signal input unit;
An information processing system comprising: The information processing apparatus includes:
A transmission / reception unit for transmitting / receiving information to / from another information processing apparatus;
An authentication information generation unit that generates predetermined authentication information and transmits the authentication information to the other information processing apparatus via the transmission / reception unit;
Response information for the authentication information is received from the other information processing apparatus via the transmission / reception unit, and it is confirmed whether the other information processing apparatus has generated the same bit string as itself based on the response information A confirmation unit;
The information processing system according to claim 1, further comprising: A signal input unit that receives the state signal from a sensor device that detects a state related to a specific event in the surroundings and outputs the state as a state signal;
A bit string generation unit that generates a bit string of a predetermined length based on the state signal input to the signal input unit;
An information processing apparatus comprising: A transmission / reception unit for transmitting / receiving information to / from another information processing apparatus;
An authentication information generation unit that generates predetermined authentication information and transmits the authentication information to the other information processing apparatus via the transmission / reception unit;
Response information for the authentication information is received from the other information processing apparatus via the transmission / reception unit, and it is confirmed whether the other information processing apparatus has generated the same bit string as itself based on the response information A confirmation unit;
The information processing apparatus according to claim 3, further comprising:   A storage unit, wherein the storage unit stores the bit sequence when the verification unit confirms that the bit sequence generated by itself and the other information processing apparatus is the same; The information processing apparatus according to claim 4.   The information processing apparatus according to claim 5, wherein the bit string stored in the storage unit is used as key information when transmitting / receiving predetermined information to / from the other information processing apparatus.   The information processing apparatus according to claim 3, wherein the bit string is obtained by binarizing the state signal with a predetermined threshold as a boundary.   The bit string generation unit divides the state signal binarized with a predetermined threshold as a boundary, counts the number of bits of the first value or the second value included in each division, The information processing apparatus according to claim 3, wherein the bit string is generated by binary conversion of a count value.   The information processing apparatus according to claim 3, wherein the status signal input to the signal input unit is in a digital format. The status signal input to the signal input unit is in an analog format,
The information processing apparatus according to claim 3, further comprising a digital signal conversion unit that converts the status signal into a digital format and outputs the digital signal to the bit string generation unit. A step of inputting the state signal to the information processing device from a sensor device that detects a state related to a specific event around and outputs the state as a state signal;
The information processing apparatus generating a bit string of a predetermined length based on the status signal;
An information processing method comprising: Checking whether another information processing apparatus has generated the same bit string as itself;
Storing the bit string when it is confirmed that another information processing apparatus has generated the same bit string as itself;
The information processing method according to claim 11, further comprising:

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