WO2008075638A1 - Method and device for generating common data - Google Patents

Abstract

[PROBLEMS] To easily generate data common to a plurality of communication devices (for instance, encryption key). [MEANS FOR SOLVING PROBLEMS] A common data generating device (100) is provided with an acceleration sensor (101); a data extracting means (103) for extracting sensing data within a prescribed period from sensing data obtained by the acceleration sensor (101); and a common data generating means for generating common data based on the extracted sensing data.

Description

 Specification

 Common data generation method and apparatus

 Technical field

 [0001] The present invention relates to a method and apparatus for generating data common to a plurality of apparatuses, and more particularly to a method and apparatus for generating common data based on sensing data acquired by sensing a common physical phenomenon.

 Background art

 [0002] In recent years, the number of wireless communication devices equipped with an access function for wireless LAN (Local Area Network) and wireless PAN (Personal Area Network) has increased, and wireless LAN standards such as IEE E802.11 and WirelessUSB using wireless PAN standards. Etc. are attracting attention. Factors for the increase in communication devices include the convenience of wireless communication, ease of introduction without a license, advances in battery technology installed in communication devices, and lower prices for communication devices.

 [0003] In wireless communication, authentication for connecting only authorized users to a network is important. This is because in wireless communication, it is difficult to physically limit the connection to the network due to the spread of radio waves.

 [0004] There are two authentication methods: a method that requires pre-shared information and a method that does not require pre-shared information between the authenticating side and the authenticated side. In the former method that requires pre-shared information, the user needs to set common information as pre-shared information between the authenticating side and the authenticated side. In the latter method, which does not require pre-shared information, there is no need for the user to set common information between the authenticating side and the authenticating side. An infrastructure such as a server is required.

 [0005] Many of them are operated on a small scale! / Wireless LANs and wireless PANs! / In many cases, the former authentication method that requires pre-shared information that does not require infrastructure is used. . For example, IEEE 802.11 (WEP (Wired Equipment Privacy)) and wireless PAN standard WiMedia, etc., employ a challenge response authentication method that requires an encryption key as pre-shared information.

[0006] In a method that requires pre-shared information, the pre-shared information is It is necessary to set common information. The pre-shared information can be set by manually sharing the common information manually on both the authenticating side and the authenticated side, and by using a secure communication path such as a cable. There are two methods that automatically set the sharing. In WirelessUSB, the former method for manually setting common information is defined as Numeric Model, and the latter method for setting common information using a secure communication path is defined as Cable Model. 1).

 On the other hand, Patent Document 1 proposes a method for generating an encryption key using data sensed by an optical sensor as a random seed as a method for generating an encryption key used in encrypted communication. However, in Patent Document 1, no consideration is given to the generation of common data among a plurality of devices!

 [0008] Patent Document 1: Japanese Translation of Special Publication 2003-536299

 Non-Patent Document 1: Association Models supplement to the Certified Wireless Universal Serial Bus Specification, Revision. 0, March 2, 2006 Disclosure of Invention

 Problems to be solved by the invention

[0009] The method of manually sharing common information as pre-shared information manually input by the user has the problem of having to implement an input / confirmation interface for inputting common information, and setting work There are problems that are complicated and problems that pre-shared information can be seen by third parties.

[0010] In addition, a method for automatically setting common information using a secure communication path such as a cable is

In the case of a communication device, there is a problem that a dedicated communication interface for communicating common information is required separately from a communication interface such as a wireless interface for communicating with other communication devices.

 [0011] The present invention has been made in view of the above circumstances. The purpose of the present invention is to eliminate the need to implement an input confirmation interface, to simplify the sharing setting work, and to provide pre-shared information as the third information. It is an object of the present invention to provide a common data generation method and apparatus that can be hidden from a user and can eliminate the need for a dedicated communication interface for sharing common information.

Means for solving the problem [0012] A first common data generation method of the present invention is a method of generating common data among a plurality of devices, and each device simultaneously senses a physical phenomenon common to other devices using a sensor. And a second step in which each device generates common data in the same manner as other devices based on the sensing data acquired in the first step.

[0013] A first common data generation device of the present invention includes common data generation means for generating common data in the same way as other devices based on a sensor simultaneously with a physical phenomenon common to other devices. Effect of

 [0014] According to the present invention, it is possible to generate the same data common to a plurality of devices by simply sensing a physical phenomenon common to the plurality of devices. Can be made unnecessary and sharing setting work can be simplified.

 Brief Description of Drawings

 FIG. 1 is a block diagram of a first embodiment of a common data generation device of the present invention.

 FIG. 2 is an external perspective view of a device such as a communication device incorporating the common data generation device of the present invention.

 FIG. 3 is a diagram showing how a common physical phenomenon, vibration, is applied to a plurality of common data generation devices to generate common data!

 FIG. 4 is a diagram showing an operation sequence of the first embodiment of the common data generation device of the present invention.

 FIG. 5 is a block diagram of a second embodiment of a common data generation device of the present invention.

 FIG. 6 is a diagram showing an operation sequence of the second embodiment of the common data generating apparatus of the present invention.

 FIG. 7 is a block diagram of a first exemplary embodiment of a communication device according to the present invention.

 FIG. 8 is a diagram showing an operation sequence of the communication apparatus according to the first embodiment of the present invention.

 FIG. 9 is a block diagram of a second exemplary embodiment of a communication device according to the present invention.

FIG. 10 shows an operation sequence of the second embodiment of the communication apparatus of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

[0016] (First embodiment of common data generation device)

 Referring to FIG. 1, a common data generation apparatus 100 that is effective in the first embodiment of the present invention includes an acceleration sensor 101, a common data generation means 102, and a data extraction means 103.

 The acceleration sensor 101 has a function of sensing acceleration due to vibration of the common data generation device 100 on which the sensor is mounted, and outputting analog sensing data to the data extraction unit 103. The acceleration sensor 101 may be fixed to the device 100 or may be a detachable structure.

 The data extraction unit 103 has a function of inputting sensing data from the acceleration sensor 101, extracting a part of the sensing data, and outputting the extracted sensing data to the common data generation unit 102. The data extraction means 103 is composed of an A / D conversion means 104, a buffer 105, and a timing control means 106.

 The A / D conversion means 104 converts analog sensing data output from the acceleration sensor 101 into digital sensing data and outputs the digital sensing data to the buffer 105 and the timing control means 106. The A / D conversion means 104 may have fixed parameters such as sampling frequency and sampling sensitivity, or may be arbitrarily set by A / D conversion settings given from the common data generation means 102, for example. .

 The timing control means 106 controls the start and end timings of sensing data accumulation in the buffer 105. In the case of the present embodiment, the timing control means 106 monitors the sensing data output from the A / D conversion means 104, and detects the sensing data that first exceeds a predetermined threshold with respect to the buffer 105. The storage start is instructed, and thereafter the storage end is reduced to the buffer 105 after a predetermined time T has elapsed.

[0021] The notifier 105 includes a storage device such as a semiconductor memory, and when the timing control means 106 receives an instruction to start accumulation, accumulation of sensing data input from the A / D conversion means 104 is started. When the storage control instruction is received from the timing control means 106, the sensing data storage operation is stopped. The common data generation unit 102 has a function of generating common data based on the sensing data of the acceleration sensor 101 extracted by the data extraction unit 107.

 Next, with reference to FIG. 4, the detailed operation of the common data generating apparatus 100 which is effective for the present embodiment will be described.

 The acceleration sensor 102 operates, for example, while the power source of the common data generation device 100 is turned on, and outputs sensed data as an analog signal. When the generation of common data is instructed from the outside, the common data generation unit 102 sends an instruction to start the operation to the A / D conversion unit 104 (step Al). As a result, the A / D conversion unit 104 converts the analog sensing data output from the acceleration sensor 102 into a digital signal and starts sending it to the buffer 105 and the timing control means 106.

 Next, the common data generation unit 102 instructs the timing control unit 106 to start operation (step A2). As a result, the timing control means 106 starts an operation of comparing the sensing data output from the A / D conversion means 104 with a preset threshold value. Then, at the timing when sensing data having a value larger than the threshold is detected, the buffer 105 is instructed to start accumulation (step A3). In response to this instruction, the buffer 105 starts accumulating the sensing data output from the A / D conversion means 104.

Yes

 [0026] Timing control means 106 starts an internal timer when instructing the start of accumulation, and terminates accumulation in buffer 105 when the timer value reaches a predetermined time T. Instruct (Step A4). In response to this instruction, the buffer 105 stops the operation of accumulating the sensing data output from the A / D conversion unit 104 and notifies the common data generation unit 102 of the end of buffering.

 [0027] The common data generation unit 102 reads the sensing data stored in the notifier 105 (step A5), generates common data based on the sensing data, and generates the common data generated for the common data generation request source. A common data generation completion event including data is sent (step A6).

[0028] For example, if the number of output bits of the A / D conversion means 104 is 16 bits, the sampling period is lms, and the fixed time T is 10 ms, a total of 10 16-bit digital sensing data is accumulated in the buffer 105. The The values of these 10 digital sensing data are shown in Figure 3. As described above, the same vibration is basically applied to a plurality of devices 200 that simultaneously applied the same vibration. Therefore, if the method for generating the common data from the sensing data is the same in the plurality of devices 200, the generated common data is the same. For example, the most common sensing method is to use the largest sensing data among the acquired sensing data as the common data, the second largest sensing data as the common data, and the next largest sensing data. Various methods can be used, such as combining the upper 8 bits of large sensing data into common data. In addition, common data can be obtained by performing the same logical operation (shift, etc.) on the same sensing data.

 (Effect of the first embodiment of the common data generation device)

 Next, the effect of this embodiment will be described.

[0030] According to the present embodiment, common data can be generated for a plurality of devices 100 only by shaking the plurality of common data generation devices 100 together.

Further, according to the present embodiment, by providing the common data generating device 100 with the coupling guides 202 and 203, the plurality of devices 100 are integrated in a state where the positions of the two acceleration sensors 101 are aligned. The force S can be used to make the sensing data of both acceleration sensors 101 equal.

 [0032] Further, according to the present embodiment, the sensing data output from the A / D conversion means 104 is monitored and stored in the buffer 105 when sensing data that first exceeds a predetermined threshold is detected. By having timing control means 106 for instructing the start and then instructing the buffer 105 to end the accumulation after a predetermined time T has elapsed, it is sensed by the acceleration sensors of a plurality of common data generation devices 100. Data can also be extracted within the same period, resulting in the same common data.

(Second Embodiment of Common Data Generation Device)

Referring to FIG. 5, the common data generation device 300, which is the power of the second embodiment of the present invention, is provided with the correction means 107, and therefore the common data generation device 300 according to the first embodiment shown in FIG. Different from the data generation device 100. The correction unit 107 receives the sensing data from the common data generation unit 102, performs correction to make the sensing data equal among a plurality of devices, and returns the corrected sensing data to the common data generation unit 102. The common data generation means 102 generates common data based on the corrected sensing data.

 FIG. 6 shows an operation sequence of the common data generating apparatus 300, and steps A7 and A8 are different from the first embodiment shown in FIG. That is, when the common data generation unit 102 reads the sensing data from the buffer 105 (step A5), it passes it to the correction unit 107 (step A7). The correction unit 107 performs predetermined correction on the received sensing data, and returns the corrected sensing data to the common data generation unit 102. The common data generating means 102 generates common data based on the corrected sensing data (step A8).

 [0036] As a correction method by the correction means 107, the following method can be considered.

[0037] a) Noise is removed by passing the sensing data through a noise gate filter.

 b) Normalize the sensing data by passing it through a normalization filter.

 c) A part of the sensing data is exchanged with the correction means 107 of the other device that generates the common data, and the correction parameter is calculated by comparing it with the corresponding sensing data of its own device. Correct the sensing data. For example, the X, Υ, and Ζ direction components of multiple exchanged acceleration data are compared, and the angle deviation and sensing sensitivity deviation are calculated as correction parameters. Based on these correction parameters, the sensing data is calculated. By performing rotation and enlargement processing, the sensing data is made the same among multiple devices.

 d) Calculate the correction parameter based on the sensing data from multiple sensors, and correct the sensing data based on this correction parameter. For example, an angular velocity sensor for correction is provided in addition to the acceleration sensor 101 to sense the angular velocity for the same period as the acceleration sensor 101, and the corresponding angular velocity of acceleration sensing data acquired from the acceleration sensor has a certain threshold value or less Is the sensing data after correction.

e) Ignore small differences due to noise by extracting features from sensing data. [0038] (Effects of the second embodiment of the common data generation device)

 Next, the effect of this embodiment will be described.

 [0039] According to the present embodiment, since the correction means 107 is provided, the direction and position of both acceleration sensors 101 when the noise is mixed, the performance of the acceleration sensor 101 varies, and vibration is applied. Even if the sensing data of the acceleration sensor 101 accumulated in both buffers 105 is misaligned due to misalignment, etc., it can be corrected to the same sensing data. Can be the same between.

 [0040] (Another embodiment of the common data generation device)

 In the above embodiment, any other physical phenomenon can be used as long as it is a physical phenomenon that can be sensed simultaneously by a plurality of devices as force that senses acceleration accompanying vibration as a common physical phenomenon. In that case, a necessary sensor may be used instead of the acceleration sensor. Specifically, sensors that can be used in addition to acceleration sensors include angular velocity sensors, azimuth sensors, position sensors, tilt sensors, pressure sensors, magnetic sensors, optical sensors, sound sensors, cosmic ray sensors, rainfall sensors, sunshine sensors, wind directions Sensors, wind speed sensors, wave force sensors, flow rate sensors, pollen sensors, temperature sensors, humidity sensors, etc. are conceivable.

 [0041] In the above embodiment, the timing control means 106 instructs the buffer 105 to start accumulation at the timing when the acceleration sensing data first exceeds a predetermined threshold value. The timing to issue is not limited to this, and can be set arbitrarily. In addition, an accumulation start instruction may be issued in response to a change in output of sensing data different from the acceleration sensing data. For example, an instruction to start accumulation may be issued when a voice uttering “start” is detected by voice recognition.

 [0042] In the above embodiment, the timing control means 106 issues a storage end instruction after a certain time T has elapsed from the time when the storage start instruction is issued. However, it can be set arbitrarily. For example, an accumulation end instruction may be issued when it is detected that the acceleration sensing data has fallen below another preset threshold value, or another sensing may be performed in the same manner as a modification example of the accumulation start instruction. An instruction to end storage may be issued in response to a change in data output.

[0043] (First embodiment of communication device) Referring to FIG. 7, the encrypted communication device 400 according to the first embodiment of the communication device of the present invention includes a common data generation device 500, an encryption unit 401, a communication unit 4002, and the like. Have

 The common data generation device 500 is the same device as the common data generation device 100 in FIG. 1 or the common data generation device 300 in FIG.

 When receiving the common data generation completion event from the common data generation device 500, the encryption unit 401 sets the common data included in the event notification as an encryption key. In addition, when the encryption unit 401 receives the encryption request from the communication unit 402, the encryption unit 401 encrypts the data included in the encryption request using the encryption key, and returns the encrypted data to the communication unit 402. Further, when receiving the decryption request from the communication unit 402, the encryption unit 401 decrypts the data included in the decryption request and returns the decrypted data to the communication unit 402.

 [0046] At the time of transmission, the communication unit 402 sends an encryption request including the data to be encrypted to the encryption unit 401, and receives the encrypted data. Then, the encrypted data is transmitted to another encrypted communication device. Further, at the time of reception, the communication unit 402 sends a decryption request including encrypted data received from another encrypted communication device to the encryption unit 401, and receives the decrypted decrypted data.

 Next, with reference to FIG. 8, the operation of the encrypted communication device 400 of the present embodiment will be described.

 First, the key setting operation will be described. First, the common data generation device 500 generates common data in the same manner as in the above-described embodiment. The common data generation device 500 that has generated the common data triggers a common data generation event and sends the generated common data to the encryption unit 401. When the encryption unit 401 detects the common data generation completion event from the common data generation device 500, the encryption unit 401 sets the common data included in the event notification as an encryption key (step Bl).

Next, the operation of the encryption process will be described. First, when the communication unit 402 receives a transmission request including data from an arbitrary transmission request source inside or outside the encrypted communication device 400, the communication unit 402 transmits an encryption request including the data to the encryption unit 401. The encryption unit 401 that has received the encryption request encrypts the data included in the encryption request using the encryption key and returns the data to the communication unit 402. The communication means 402 that has received the encrypted data uses another encryption Send the encrypted data to the communication device (step B2).

 Next, the operation of the decoding process will be described. First, when the communication unit 402 receives a reception request including encrypted data from an arbitrary reception request source inside or outside the encrypted communication device 400, the communication unit 402 includes the encrypted data in the encryption unit 401. Send a decryption request. The encryption unit 401 that has received the decryption request decrypts the encrypted data included in the decryption request using the encryption key, and transmits the decrypted decrypted data to the communication unit 402. The communication means 402 that has received the decoded data completes the reception process (step B3).

 [0051] In the above description, the common data itself generated by the common data generation device 500 is used as the encryption key. However, the common data is converted into the bit length required by the encryption algorithm as the encryption key. For example, data obtained by performing some operation on common data may be used as the encryption key.

 [0052] (Effects of First Embodiment of Communication Device)

 Next, the effect of this embodiment will be described.

 According to the present embodiment, a common encryption key can be set only by causing a plurality of encrypted communication devices 400 to sense a common physical phenomenon. This eliminates the need to implement an input confirmation interface, simplifies the encryption key setting process, prevents the encryption key from being seen by a third party, and provides dedicated communication for sharing the encryption key. No interface is required.

 (Second Embodiment of Communication Device)

 Referring to FIG. 9, a group communication device 600, which is a second embodiment of the communication device of the present invention, includes a common data generation device 500, an address generation unit 601 and a communication unit 602 according to the present invention. Have.

 The common data generation device 500 is the same device as the common data generation device 100 in FIG. 1 or the common data generation device 300 in FIG.

[0056] Upon receiving the common data generation completion event from the common data generation device 500, the address generation unit 601 generates a group address based on the common data included in the event notification. Specifically, for example, the common data is converted into a bit length defined as a group address, or is converted into an address expression that can fit in the group address space. Group ad The address generation unit 601 that generated the address sends an address setting request including the generated group address to the communication unit 602.

When communication means 602 receives an address setting request including a group address, it sets a double address. When receiving a transmission request including data, the communication unit 602 sets the group address in the data and transmits it to the channel. Further, when receiving the reception request including the data, the communication means 602 confirms the destination address included in the data, and receives the data only when the destination address matches the group address set by itself.

 Next, the operation of group communication apparatus 600 of the present embodiment will be described with reference to FIG.

 First, the group address setting operation will be described. First, the common data generation device 500 generates common data in the same manner as in the embodiment described above. The common data generation device 500 that has generated the common data triggers a common data generation completion event, and sends the generated common data to the address generation means 601 (step Cl). The address generation means 301 generates a group address from the common data, and sends an address setting request including the generated group address to the communication means 602 (step C2).

 [0060] Next, the operation of the transmission process will be described. Upon receiving a transmission request including data from an arbitrary transmission request source inside or outside the group communication device 600, the communication means 602 sets a group address in the data and transmits it to the channel (step C3).

 Next, the reception processing operation will be described. When the communication means 602 receives a reception request including data from an arbitrary reception request source inside or outside the group communication device 600, the communication means 602 checks the destination address of the data, and the destination address matches the own group address. Only receive data (step C4).

 (Effects of Second Embodiment of Communication Device)

 Next, the effect of the second embodiment will be described.

[0063] According to the present embodiment, a common group address can be set only by sensing a common physical phenomenon in a plurality of group communication devices 600. This eliminates the need to implement a confirmation interface for input, simplifies group address setting work, prevents group addresses from being seen by third parties, and shares group addresses. Dedicated communication interface is not required.

 [0064] As described above, according to the common data generation device and the communication device according to the embodiment of the present invention, when a plurality of devices simultaneously sense a common physical phenomenon using the same sensor, the basic data generation device and the communication device Since the same sensing data can be obtained, the common data generated by the same method based on the sensing data is the same data among multiple devices.

 [0065] Therefore, it is possible to generate the same data common to a plurality of devices by simply sensing a common physical phenomenon in a plurality of devices at the same time, eliminating the need to implement an input 'confirmation interface. Yes, sharing setting work can be simplified. In addition, pre-shared information cannot be seen by third parties, and a dedicated communication interface for sharing common information can be eliminated.

 (Other Embodiments of Communication Device)

 In the above embodiment, the force common data itself that has been communicated using the common data may be communicated.

 [0067] Differences in sensing data detected by a plurality of devices can be reduced by making the positions of the sensors of the common data generating device mounted in the above embodiments end. For example, by mounting an acceleration sensor at the end of the communication device, even if the user gives a movement that turns his / her arm, the difference in sensing data detected by a plurality of devices is reduced. The reason is that the axial force of the rotation of the arm turning movement is not located between the two sensors. “End” here means not only the end of the device physically but also the end of the device cognitively. For example, even if a sensor is mounted at the center of a device, if it can be perceived as if the center of the device is held at the end of the hand, it is an end.

FIG. 2 is a diagram showing a specific external configuration example of the common data generation device according to the embodiment of the present invention.

Referring to FIG. 2, coupling guides 202 and 203 for coupling the positions of the acceleration sensor 101 and the other common data generation apparatus to the back surface of the casing 201 of the common data generation apparatus 100 according to the present embodiment. Is provided. The coupling guide 202 provided at the upper end is processed into a concave shape, and the coupling guide 203 provided at the lower end is formed in the concave portion of the coupling guide 202. It is processed into the convex shape to be fitted. The acceleration sensor 101 is installed near the center of the back surface of the device 100. The two common data generation devices 100 are turned upside down, and the coupling guide 202 and the coupling guide 203 of one device are connected to the other device. When the back surfaces of the coupling guide 203 and the coupling guide 202 are fitted together, the two acceleration sensors 101 come close to each other.

[0069] FIG. 3 is a diagram showing a state in which vibration, which is a common physical phenomenon, is applied to a plurality of common data generation apparatuses in order to generate common data.

 Referring to FIG. 3, when common data is set in a plurality of common data generation apparatuses 100 according to the present embodiment, as described with reference to FIG. 2, the connection guides 202 and 203 provided in each apparatus 100 are used. In a state where the positions of both acceleration sensors 101 are aligned, for example, the two devices 100 are grasped and shaken by a human hand. As a result, both acceleration sensors 101 sense acceleration associated with vibration, which is a common physical phenomenon, and the sensing data detected during the same period is stored in both buffers 105. Both common data generation means 102 generates common data by the same method based on the sensing data stored in the buffer 105.

 [0070] Here, since the two common data generation devices 100 are coupled by the coupling guides 202 and 203, both of them vibrate together, and the positions of both acceleration sensors 101 are close to each other. Therefore, equal acceleration is applied to both the acceleration sensors 101. In addition, since the common data generation device 100 built in the two devices 100 is exactly the same, the data sensed by both acceleration sensors 101 and the sensing data extracted by the data extraction means 103 are the same, The common data generated by the same method from the same sensing data is the same data in both devices 100. Thus, according to the present embodiment, the same data common to a plurality of devices can be generated only by sensing a common physical phenomenon in the plurality of devices simultaneously.

 [0071] This application (until 19 December 2006, filed as Japanese Patent Application No. 2006-340907, filed on December 19, 2006, claims priority), the entire disclosure of which is incorporated herein.

 Industrial applicability

[0072] A common data generation method and apparatus according to the present invention includes a wireless PAN device, a game console, and the like. It can be applied to trollers, portable game machines, wearable PCs, in-vivo / external communication systems, disaster warning systems, and so on.

Claims

The scope of the claims  [1] A method for generating data common to a plurality of devices,  Each device uses a sensor to simultaneously sense physical phenomena in common with other devices. 1 step and  A common data generation method, wherein each device includes a second step of generating common data in the same manner as other devices based on the sensing data acquired in the first step.  [2] The common data generation method according to claim 1, wherein the second step includes a process of extracting sensing data within the same period as other devices from the sensing data acquired by the sensor.  [3] The common data generation method according to claim 1, wherein the second step includes a process of correcting the sensing data to be equal among a plurality of devices.  [4] At least one sensor for sensing physical phenomena common to other devices at the same time, and common data that generates common data in the same way as other devices based on the sensing data acquired by the sensor A common data generation device comprising a data generation means.  [5] The common according to claim 4, further comprising data extraction means for extracting sensing data within the same period as other devices from the sensing data acquired by the sensor and outputting the same to the common data generating means. Data generator.  [6] The data extraction means monitors the sensing data acquired by the sensor, and detects the sensing data that satisfies the start condition defined in common with other devices, and then determines in common with other devices. 6. The common data generation device according to claim 5, wherein sensing data within a period until a time when the specified termination condition is satisfied is extracted. [7] The data extraction means includes an A / D conversion means for converting analog sensing data output from the sensor into digital sensing data, a buffer for storing the digital sensing data, and the digital sensing data. A timing control means for monitoring the sensing data and performing a control to store the digital sensing data in the buffer within a period until the end condition is satisfied when sensing data that satisfies the start condition is detected; The common data generation according to claim 6, further comprising: apparatus.  8. The common data generation device according to claim 4, further comprising correction means for performing correction for equalizing the sensing data among a plurality of devices. 9. The common data generation device according to claim 8, wherein the correction unit performs the correction based on sensing data acquired by a correction sensor. 10. The common data generation device according to claim 8, wherein the correction unit performs the correction based on correction data received from another device. 11. The common data generation device according to claim 10, wherein the correction data is a part of sensing data acquired by another device. 12. The common data generation apparatus according to claim 8, wherein the correction unit performs feature extraction from the sensing data. [13] The sensor includes an acceleration sensor, an angular velocity sensor, an orientation sensor, a position sensor, a tilt sensor, a pressure sensor, a magnetic sensor, an optical sensor, a sound sensor, a cosmic ray sensor, a rainfall sensor, a solar sensor, a wind direction sensor, and a wind speed. 5. The common data generation device according to claim 4, wherein the common data generation device is one of a sensor, a wave force sensor, a flow rate sensor, a pollen sensor, a temperature sensor, and a humidity sensor.  [14] A communication device including a communication unit that performs communication using the common data generated by the common data generation device according to any one of claims 4 to 13. 15. The communication device according to claim 14, wherein a secret key is generated based on the common data.  16. The communication device according to claim 14, wherein a group address for performing group communication is generated based on the common data. [17] A communication device comprising communication means for transmitting common data generated by the common data generation device according to any one of claims 4 to 13. 18. The communication device according to claim 14 or claim 17, wherein the position of the sensor is an end.  [19] The communication device according to [14] or [17], further comprising a coupling guide for coupling the position of the sensor with another device.