WO2013015252A1

WO2013015252A1 - Information transmission terminal

Info

Publication number: WO2013015252A1
Application number: PCT/JP2012/068614
Authority: WO
Inventors: 修山森
Original assignee: 株式会社エヌ・ティ・ティ・ドコモ
Priority date: 2011-07-22
Filing date: 2012-07-23
Publication date: 2013-01-31
Also published as: JPWO2013015252A1

Abstract

[Problem] To make it difficult to predict a key which is used in an encrypted communication. [Solution] With a transmission-side information transmission terminal (1), a measurement unit (16) measures quantities of a plurality of respective components which are included in a specimen. An acquisition unit (115) acquires information which denotes the quantities of the components which are measured by the measuring unit (16). A generation unit (111) generates a key based on the quantities of each component which is acquired with the acquisition unit (115). An encryption unit (112) encrypts data using the key which is generated with the generation unit (111) and generates encrypted data. A communication unit (13) transmits the encrypted data which is generated by the encryption unit (112) to a receiving-side information transmission terminal (1).

Description

Information transmission terminal

The present invention relates to encrypted communication by an information transmission terminal.

 Passwords and passphrases may be used as keys to protect information. From the viewpoint of security, a complicated character string or the like is suitable for this key, but if the key is too complicated, the user may not be able to remember it. On the other hand, if a key that is easy for the user to remember is adopted as the key, the key may be guessed by an unauthorized user.

Therefore, it is considered to use the analysis results of substances for the maintenance of information. US Pat. No. 6,057,017 uses one or several digital signatures derived from at least one structural property of a material element that is complex, disordered, unique and has a stable structure. And a method for reading such protected data, as well as a medium for such protected data. Patent Document 2 discloses that a physical object having a random feature is authenticated using a memory tag. Patent Document 3 discloses the use of inorganic particles held in place in a coating composition or printing ink as a labeling means so that the chemical element ratio can be analyzed.

Special table 2007-520962 gazette JP 2005-327248 A JP-T 2002-2002144 Publication

However, in the technique disclosed in Patent Document 1, the material elements have to be complicated, disordered, unique, and have a stable structure. In particular, since the technology described in Patent Document 1 uses a unique structure of a material element, it is difficult to use it for encryption communication using a common key for both transmission and reception without using a substitute or duplicate of the material element. there were. Further, the technique disclosed in Patent Document 2 checks whether or not the basic medium is the original by checking whether or not the measurement result of the specific position of the basic medium matches the measurement result stored in advance. It was difficult to apply to encrypted communication. Further, the technique disclosed in Patent Document 3 uses inorganic particles as a labeling means, and can be applied to prevent forgery or unauthorized transactions, but encrypts a message and uses it for communication. It was difficult to use for encryption communication.

The object of the present invention is to make it difficult to predict a key used for encrypted communication.

In one aspect, an information transmission terminal according to the present invention is an acquisition unit that acquires information about one or more components included in a sample, and a generation unit that generates a key based on the information acquired by the acquisition unit. An encryption unit that encrypts data using the key generated by the generation unit to generate encrypted data, and a transmission unit that transmits the encrypted data generated by the encryption unit to another information transmission terminal; It comprises.

In another aspect, an information transmission terminal according to the present invention is a reception unit that receives encrypted data from another information transmission terminal, an acquisition unit that acquires information about one or more components included in a sample, and the acquisition unit A generating unit that generates a key based on each piece of information acquired by the above, and a decrypting unit that decrypts the encrypted data received by the receiving unit using the key generated by the generating unit.

Preferably, a specifying unit that specifies a method of generating a key based on information indicating the amount or physical property of a component is provided, and the generating unit generates the key according to a method specified by the specifying unit.

Preferably, the method further includes a specifying unit that specifies a method for acquiring information about one or more components contained in the sample, and the acquiring unit acquires the information according to the method specified by the specifying unit. Good.

Also, preferably, a specifying unit that specifies an encryption method is provided, and the encryption unit encrypts the data according to a method specified by the specifying unit.

Further, preferably, a specifying unit that specifies a decryption method is provided, and the decryption unit decrypts the encrypted data according to a method specified by the specifying unit.

Preferably, an operation unit that receives an operation for a user to select one option for each of a plurality of items to which a plurality of options are respectively assigned is provided, and the specifying unit is configured to perform an operation received by the operation unit. The method may be specified according to the combination of options shown.

Preferably, a time information acquisition unit that acquires time information indicating time is provided, and the specifying unit may specify the method according to a period including the time indicated by the time information.

In one aspect, an information transmission method of the present invention acquires information on one or more components contained in a sample from a measurement unit connected to a transmission device, and generates a key based on the acquired information. The data is encrypted using the generated key to generate encrypted data, and the generated encrypted data is transmitted.

In another aspect, the information transmission method of the present invention receives encrypted data from a transmission device, acquires information about one or more components contained in a sample from a measurement unit connected to the reception device, and the acquired information A key is generated based on the information, and the received encrypted data is decrypted using the generated key.

In still another aspect, the information transmission method of the present invention acquires information indicating at least one of the amounts or physical properties of a plurality of components contained in a sample in each of a transmission device and a reception device, and the acquired information An encryption key and a decryption key are respectively generated on the basis of the transmission of data encrypted using the encryption key in the communication between the transmission device and the reception device, and the encrypted Data is decrypted using the decryption key.

According to the present invention, it is possible to make it difficult to predict a key used for encrypted communication.

It is a figure which shows the outline | summary of the communication system which concerns on embodiment. It is a figure which shows the structure of an information transmission terminal. It is a figure which shows the functional structure which concerns on the encryption of an information transmission terminal. It is a figure which shows the functional structure which concerns on the decoding of an information transmission terminal. It is a flowchart which shows the flow of the operation | movement in which a production | generation part produces | generates a key. It is a graph showing the chemical composition of the sample measured by the measurement part. It is a figure showing the peak value and quantization value of each component which were measured by the measurement part. It is a figure which shows the state which arranged the quantization value of each component. It is a figure which shows the functional structure which concerns on the encryption of the information transmission terminal in a modification. It is a figure which shows the functional structure which concerns on the decoding of the information transmission terminal in a modification. It is a figure which shows the combination of the component used as a measuring object. It is a figure which shows the kind of quantization method. It is a figure which shows the kind of arrangement method. It is a figure which shows the kind of measuring method. It is a figure which shows the whole structure of the communication system which concerns on a modification. It is a figure which shows the structure of the information transmission terminal which concerns on a modification. It is a figure which shows the structure of the communication system which concerns on a modification. It is a figure which shows the function structure of the terminal which concerns on a modification. It is a figure which shows the example of transmission operation | movement which concerns on a modification. It is a figure which shows the example of reception operation | movement which concerns on a modification.

DESCRIPTION OF

SYMBOLS

1, 1a ... Information transmission terminal, 11 ... Control part, 111 ... Generation part, 112 ... Encryption part, 113 ... Decoding part, 114 ... Identification part, 115 ... Acquisition part, 12 ... Storage part, 13 ... Communication part, 14 DESCRIPTION OF SYMBOLS Operation part 15 ... Display part 16 ... Measurement part 16a ... Interface 17 ... Sound collection part 18 ... Sound emission part 2 ... Communication network 3 ...

Measurement apparatus

9, 9a ... Communication system

1. Embodiment 1-1. System Configuration FIG. 1 is a diagram illustrating an overview of a communication system 9 according to an embodiment. The communication system 9 includes a plurality of information transmission terminals 1 and a communication network 2 that connects them to each other. The information transmission terminal 1 is a terminal that performs communication via the communication network 2, and is a mobile telephone that transmits and receives electronic mail in this embodiment. The communication network 2 is a communication network that connects the information transmission terminals 1 to each other, and is a mobile communication network in the present embodiment. The number of information transmission terminals 1 is not limited to two and may be three or more.

1-2. Configuration of Information Transmission Terminal FIG. 2 is a diagram illustrating a configuration of the information transmission terminal 1. The control unit 11 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The CPU stores a boot loader stored in the ROM and a program stored in the storage unit 12 in the RAM. Each part of the information transmission terminal 1 is controlled by reading out and executing.

The storage unit 12 is a storage unit such as a solid state drive or an EEPROM (Electrically Erasable and Programmable Read Only Memory), and stores programs and various data read into the control unit 11.
The communication unit 13 is a circuit that communicates with the communication network 2.
The operation unit 14 includes operation elements such as buttons and sensors for inputting various instructions, receives an operation by the user, and supplies a signal corresponding to the operation content to the control unit 11.
The display unit 15 is a display device using liquid crystal, and displays an image according to a signal supplied from the control unit 11.

The measuring unit 16 is a mobile measuring device that receives a sample and measures the chemical composition of the sample. The measuring unit 16 is specifically an organic acid measuring device using high performance liquid chromatography. A user of the information transmission terminal 1 adjusts a solution by dissolving a sample such as food or beverage in a determined solvent at a determined ratio, and encloses the solution in an ampoule Am such as a glass container. The measuring unit 16 includes a column filled with a porous solid and the like, and a socket Sc connected to the column. When the ampoule Am is inserted into the socket Sc by the user, the column of the measuring unit 16 receives the solution enclosed in the ampoule Am. The measurement unit 16 acquires component values indicating the amounts of a plurality of components contained in the received sample, and supplies signals corresponding to these component values to the control unit 11.

The “component value” as used herein may be, for example, the presence ratio of each substance (for example, expressed by weight concentration or molar concentration) in the case where the sample is a mixture of a plurality of types of substances. May be the elemental composition ratio, or may be the ratio of one component to the whole.
In short, any physical quantity such as mass or specific gravity obtained as a result of analyzing a sample by some method from the viewpoint of components may be used.
In the “liquid chromatography method”, information on a plurality of components can be obtained at once by liquefying a sample and measuring the amount of infrared absorption. Moreover, it may replace with a liquid chromatography method and may use the gas chromatography method which measures with respect to the gasified sample.
However, the measurement method of the measurement unit 16 is not limited to an analysis method based on the premise of separation of substances such as a chromatography method, and any analysis method can be applied. Further, it is not necessary to supply all of the measured information to the control unit 11, and only a part of the information may be supplied. For example, when information about a plurality of components in a sample (component ratio or the like) is measured, only information about some components may be supplied. The component includes a component of a substance recognized as a foreign object. Further, when a plurality of pieces of information (for example, pH (hydrogen ion concentration) and salinity (sodium) concentration) are measured for one component, only one piece of information may be supplied.
Specific examples of measuring devices include pH meters, salinity analyzers, sugar content analyzers, conductivity meters, resistivity meters, TOC meters, fluorescence spectrometers, Raman spectrometers, various small analyzers, and FT-IR. Any of these may be used in the present invention, but these are merely examples and are not intended to be limiting.

The sound collection unit 17 includes a microphone that generates an audio signal corresponding to the surrounding audio, converts the generated audio signal into a digital signal, and supplies the digital signal to the control unit 11.
The sound emitting unit 18 includes a speaker that generates sound. Under the control of the control unit 11, the sound emitting unit 18 converts the instructed sound signal into an analog signal and generates sound corresponding to the signal from the speaker.

1-3. Functional Configuration of Information Transmission Terminal FIG. 3 is a diagram showing a functional configuration related to encryption of the information transmission terminal 1. The control unit 11 of the information transmission terminal 1 functions as the generation unit 111, the encryption unit 112, and the acquisition unit 115 illustrated in FIG. The acquisition unit 115 acquires a signal (information) corresponding to each component value of the sample to be used from the measurement unit 16. The generation unit 111 generates a key based on each of these signals, that is, the amount of each component acquired by the acquisition unit 115. This key is an electronic key represented by digital data.

The encryption unit 112 encrypts the message. The message is data to be transmitted, for example, data representing a document, audio, video, etc. to be transmitted to a person. In this example, the message is e-mail data edited and stored in the storage unit 12 for transmission. The encryption unit 112 reads the message from the storage unit 12 and encrypts the message using the key generated by the generation unit 111 according to the determined common key encryption method to generate encrypted data. The communication unit 13 transmits the encrypted data generated by the encryption unit 112 to another information transmission terminal 1 as an electronic mail.

FIG. 4 is a diagram showing a functional configuration related to decoding of the information transmission terminal 1. The control unit 11 of the information transmission terminal 1 functions as the generation unit 111 and the decryption unit 113 illustrated in FIG. 4 when receiving the encrypted electronic mail. The communication unit 13 at the time of receiving the e-mail receives the encrypted data as an e-mail from the information transmission terminal 1 on the transmission side. The generation unit 111 generates a key based on a signal corresponding to each component value acquired from the measurement unit 16 in the same manner as when sending an e-mail.

The decryption unit 113 decrypts the encrypted data into a message. The decryption unit 113 decrypts the encrypted data received by the communication unit 13 by using the key generated by the generation unit 111 according to the determined common key encryption method, and generates a message. The generated message is stored in the storage unit 12.

1-4. Key Generation Operation FIG. 5 is a flowchart showing a flow of operations in which the generation unit 111 generates a key. When the generation unit 111 acquires a signal corresponding to each component value from the measurement unit 16 (step S101), the generation unit 111 performs quantization to generate a quantization value that is a digital signal used as a key element based on the acquired signal. Perform (step S102).

FIG. 6 is a chromatogram of the sample measured by the measuring unit 16. The horizontal axis in FIG. 6 indicates the time from when the sample is put into the column until it passes through the column, and the vertical axis indicates the amount of the component that has passed through the column at that time. Since each component contained in the sample has a different speed of passing through the column, there is a difference in the time to pass through the column. An electrical conductivity measuring device is provided after the column. The electric conductivity of the solution that has passed through the column is measured by this electric conductivity measuring device. Since this electrical conductivity has a correlation with the amount of the component contained in the solution, the amount of each component contained in the sample is obtained as a peak value in the chromatogram representing the temporal change of the electrical conductivity.

FIG. 7 is a diagram showing the peak value and the quantized value of each component measured by the measurement unit 16. The peak of the component with the component number “2” appears at the position “8.6 minutes” shown in FIG. Based on the electrical conductivity measured at this peak, a numerical value “9.5” in decimal notation is obtained as a component value corresponding to the amount of the component with the component number “2”. When a signal indicating this numerical value is acquired from the measurement unit 16, the generation unit 111 performs quantization called “truncation” on the signal. As a result, the generation unit 111 generates a quantized value indicating the numerical value “9.0” in decimal notation and “1001” in binary notation by truncating the above decimal point. In this way, as shown in FIG. 7, quantized values that are used as key elements are generated for each of the component numbers “1” to “9” included in the sample. The quantization here includes generating a digital signal from a digital signal in addition to generating a digital signal from an analog signal.

The generation unit 111 arranges the quantized values generated by the quantization in accordance with the determined rule (step S103) and converts it into a key (step S104).
FIG. 8 is a diagram illustrating a state in which the quantized values of the components are arranged. Each quantized value shown in FIG. 7 is arranged in the order of the component number from the left end representing the most significant digit, and becomes a numerical value “11000100110011110111101001100” in binary notation. Then, the rightmost 4 digits on the least significant side (right end) of the arranged binary numbers are “right-justified”, and the whole is converted into one number. . In the example shown in FIG. 8, this numerical value is “1899EF4C” in hexadecimal notation. This numerical value is used as a key when the information transmission terminal 1 transmits and receives an electronic mail. This key is an example, and the number of digits of the key may be more or less than this.

Using the key obtained by the above operation, the information transmission terminal 1 on the transmission side transmits encrypted data obtained by encrypting an electronic mail as a message. The information transmission terminal 1 on the reception side generates the same key as the key used in the information transmission terminal 1 on the transmission side by measuring the same type of sample as that measured on the information transmission terminal 1 on the transmission side. The information transmission terminal 1 on the receiving side decrypts the received encrypted data using this key and generates a message. As a result, according to this communication system 9, it is shown that a common chemical substance is used as a sample between the user of the information transmission terminal 1 on the transmission side and the user of the information transmission terminal 1 on the reception side. Can be used for encrypted communication.

2. Modifications The contents of the above embodiment can be modified from the following viewpoints. Moreover, you may combine these viewpoints.
2-1. In the embodiment described above, the measurement unit 16 has the socket Sc into which the ampoule Am in which the sample is sealed is inserted, but the measurement unit 16 may incorporate the sample itself in advance. In this case, the built-in sample may be kept secret from the user. The measurement unit 16 may acquire the component values of a plurality of components constituting the built-in sample, and supply signals corresponding to these component values to the control unit 11. The key generated by the generation unit 111 based on a signal corresponding to each component value may be used as identification information for identifying the information transmission terminal 1 in addition to being used for encryption and decryption.

2-2. In the above-described embodiment, the information transmission terminal 1 performs cryptographic communication by using the samples shown in advance on the transmitting side and the receiving side, respectively. Cryptographic communication determined by a combination with a method for generating a key from a sample may be performed.

FIG. 9 is a diagram showing a functional configuration related to encryption of the information transmission terminal 1 in this modification. Moreover, FIG. 10 is a figure which shows the functional structure which concerns on the decoding of the information transmission terminal 1 in this modification. When the identification unit 114 receives a signal corresponding to the user's operation content from the operation unit 14, the generation unit 111 determines a method for generating a key based on this signal and notifies the generation unit 111 of the method.

For example, FIG. 11 is a diagram illustrating combinations of components to be measured. In FIG. 11, set A, set B, and set C are names for identifying each pair of components to be measured from each other, and the columns shown in FIG. 6 are associated with the component numbers for each pair. The transit time (unit: minute) is described. For example, in the set A, the component number “1” is assigned to the component whose column passage time is “8.1 minutes”. Note that “-” indicating that the passage time is not specified is described in the component number that is not used. The control unit 11 causes the display unit 15 shown in FIG. 2 to display the set A, the set B, the set C,. The user operates the operation unit 14 to perform an operation of selecting one of set A, set B, set C,. The specifying unit 114 specifies a set of components to be measured based on the options indicated by the user operation received by the operation unit 14. The generation unit 111 generates a key by a method in which the above-described identified component set is a measurement target.

FIG. 12 is a diagram showing the types of quantization methods. In FIG. 12, the quantization methods “α”, “β”, and “γ” are associated with “rounded down”, “rounded up”, and “rounded off after double”, respectively. For example, the control unit 11 causes the display unit 15 to display the quantization method α, the quantization method β, the quantization method γ. The user operates the operation unit 14 to perform an operation of selecting one of the quantization method α, the quantization method β, the quantization method γ, and so on. The specifying unit 114 specifies the type of the quantization method based on the options indicated by the user operation received by the operation unit 14. The generation unit 111 generates a key by a method using the specified type of quantization method.

Here, when the user selects the quantization method “β”, the specifying unit 114 notifies the generation unit 111 that “rounded up” is selected as the quantization method. As described above, if a numerical value “9.5” in decimal notation is obtained as a certain peak value, the generation unit 111 performs quantization “rounded up” on the numerical value. Specifically, the generation unit 111 rounds up the decimal point of the peak value and generates a quantized value “10.0” in decimal notation and “1010” in binary notation. When the user selects the quantization method “γ”, the specifying unit 114 informs the generation unit 111 that “double rounding after rounding” is selected as the quantization method. At this time, when the generation unit 111 obtains a peak value of “9.6” in decimal notation, the generation unit 111 doubles the peak value to “19.2” in decimal notation, and rounds off after the decimal point. As a result, the generation unit 111 generates a quantization value “19.0” in decimal notation and “10011” in binary notation.

FIG. 13 is a diagram showing the types of arrangement methods. The control unit 11 causes the display unit 15 to display the arrangement method I, the arrangement method II, the arrangement method III. The user operates the operation unit 14 to perform an operation of selecting any one of the array method I, the array method II, the array method III. The specifying unit 114 specifies the type of arrangement method based on the options indicated by the user operation received by the operation unit 14. The generation unit 111 generates a key by the above specified arrangement method.

In FIG. 13, the arrangement method I is “left-justified”, which is a method in which the quantized values of each component are packed from the left end, which is the most significant digit, and converted in order from the left end. When the array method I is selected, the generation unit 111 arranges the quantized values expressed in binary numbers, and converts the four digits from the left end to one hexadecimal number. If the numerical value remaining at the right end is less than 4 digits, the generation unit 111 fills the right side of the remaining numerical value with “0” in binary notation to make it 4 digits, and converts this to a 1-digit hexadecimal number. To do. According to this, the numerical value in binary notation shown in FIG. 8 is converted to “C4CF7A60” in hexadecimal notation after three digits of “0” in binary notation are padded on the right end.

Arrangement method II is “right-justified”, and as described above, conversion is performed with the least significant 4 digits of the numerical value in binary notation as one's place. Arrangement method III is “padding”, which is a method of securing a predetermined number of digits in the quantized value of each component and padding bits that do not represent the quantized value with 0 as a pad. When the array method III is selected, for example, when the generation unit 111 reserves 5 digits in binary notation for all quantized values, “11000 · 1001 · 100 · 111 · 101 · 11” in binary notation. Instead of the above-described numerical value of “10, 1001, 100”, the numerical value of “11000, 01001, 10100, 00111, 00101, 00001, 010000, 01001, 10000” is obtained. Here, the middle point “·” is a symbol for indicating the separation of each component.

As described above, even if the samples measured by the measurement unit 16 are the same, different keys are generated due to different methods for generating the keys. Therefore, the sender and receiver of the e-mail show a “pair” of the sample and a method for generating a key from the sample, and thereby the e-mail is encrypted and decrypted by the information transmission terminal 1 for encrypted communication. Just do it. In the above-described example, a plurality of options are assigned to a plurality of items such as a combination of components to be measured, a quantization method, and an array method, and the user selects one option for each item. It was. That is, the method for generating the key may be specified by a combination of options selected by the user. For example, when the method of generating a key is broken down into a plurality of processes, the information transmission terminal 1 displays options for each item indicating each process and allows the user to select. And the information transmission terminal 1 should just specify this "method to generate a key" with the combination of each selected option.
Two or more of the plurality of measurement methods exemplified above may be used. In this case, any combination of results (component values or physical property values) obtained by the respective measurement methods may be used for key generation. Of course, when a plurality of component values or physical property values can be obtained by one measurement method, they may be used in any combination.

2-3. Combination of sample and method for obtaining component amount In the above modification, information to be combined with the sample includes the combination of components to be measured, the quantization method, and the method of generating a key called the method of arrangement. Although the constituent elements are listed, they may be combined with information related to other processes. For example, the information which shows the measuring method among the methods of acquiring the quantity of a component may be sufficient. FIG. 14 is a diagram showing the types of measurement methods. In FIG. 14, the measuring method “a” is “gas chromatography”, the measuring method “a” is “liquid chromatography”, and the measuring method “c” is “infrared spectroscopy”.

For example, the information transmission terminal 1 is provided with a plurality of measurement units 16 having different measurement methods, and when any of the measurement methods shown in FIG. 14 is selected by the user via the operation unit 14, the specifying unit 114 is 9 and 10, the selected measurement method is transmitted to the acquisition unit 115 as indicated by a broken line. The acquisition unit 115 determines the measurement unit 16 to be used from among the plurality of measurement units 16 according to this measurement method. As a result, even if the same sample is used, different keys are generated due to different measurement methods. In addition, said measurement method may be specified by the combination of the choice selected about several items.

2-4. Combination of Sample and Encryption / Decryption Method Information indicating an encryption or decryption method may be used as information combined with the sample. The encryption or decryption method is an algorithm used for them, for example, DES (Data Encryption Standard), AES (Advanced Encryption Standard), or the like. The generation unit 111 may perform encryption and decryption according to the selected algorithm by allowing the user to select these algorithm types. In this case, the identification unit 114 only has to notify the encryption unit 112 and the decryption unit 113 that the selected algorithm is to be used, as indicated by a broken line in FIGS. 9 and 10.
The above encryption or decryption method may be specified as a combination of options selected for a plurality of items.

2-5. Interface Although the information transmission terminal 1 described above includes the measurement unit 16, the information transmission terminal 1 may include an interface that is connected to an external measurement device and acquires measurement results from the measurement device instead. FIG. 15 is a diagram showing an overall configuration of a communication system 9a according to this modification. The communication system 9a is different from the communication system 9 according to the above-described embodiment in that the information transmission terminal 1a is configured to connect to the measuring device 3.

FIG. 16 is a diagram showing a configuration of the information transmission terminal 1a. The information transmission terminal 1a is different from the information transmission terminal 1 according to the embodiment in that the information transmission terminal 1a includes an interface 16a connected to the external measurement device 3 instead of the measurement unit 16. The control part 11 should just acquire the quantity of the some component contained in a sample from the measuring apparatus 3 via the interface 16a, respectively. By connecting to the measuring device 3 via the interface 16a in this way, the information transmission terminal 1a does not need to have a built-in configuration for measurement, so that the weight can be reduced and the mobile phone or the like is suitable. be able to. In this case, the measuring device 3 may be fixed.

2-6. Each program executed by the control unit 11 of the information transmission terminal 1 (1a) is a computer apparatus such as a magnetic recording medium such as a magnetic tape or a magnetic disk, an optical recording medium such as an optical disk, a magneto-optical recording medium, or a semiconductor memory. Can be provided in a state stored in a readable recording medium. It is also possible to download this program via a network such as the Internet. Note that various devices other than the CPU may be applied as the control means exemplified by the control unit 11. For example, a dedicated processor or the like is used.

2-7. Encryption target In the above-described embodiment, the “message” to be encrypted is data such as e-mail, but it may be audio data indicating call voice, video data indicating streaming video, or the like. . Further, the object to be encrypted may not be information that can be understood by humans. For example, it may be data encrypted by another encryption process. In this case, the information transmission terminal 1 may further encrypt the encrypted data and transmit it to another information transmission terminal 1. In short, the message only needs to be data to be transmitted.

2-8. Measurement Item In the above-described embodiment, the item measured by the measurement unit 16 is a component value indicating the amount of each component of the sample. In addition to or instead of this, the physical characteristics (physical properties of the sample) ) May be measured. Physical properties are macroscopic mechanical, thermal, electrical, magnetic, and optical properties that are inherent to the material. For example, light transmittance, refractive index, reflectance, magnetic permeability, and thermal conductivity. It is evaluated by electrical conductivity. In a preferred embodiment, the generation unit 111 may generate a key based on at least one of these physical property parameters and the determined value of at least one component.
In one aspect, an information transmission terminal of the present invention includes an acquisition unit that acquires information about one or more components included in a sample, and a generation unit that generates a key based on the information acquired by the acquisition unit. A transmission unit that encrypts data using the key generated by the generation unit to generate encrypted data and transmits the encrypted data to another information transmission terminal; and receives encrypted data from the other information transmission terminal It suffices to have at least one of a receiving unit that performs decryption using the key generated by the generating unit.
The information about one or more components contained in the sample represents the ratio of the predetermined one or more components to the whole (component ratio such as weight ratio or volume ratio) or physical characteristics of each of the one or more components. Further, it may be a combination of a component ratio and a physical quantity for one component.
In one aspect, the information transmission method of the present invention includes (a) information indicating the amount of at least one component contained in samples prepared in each of the transmission device and the reception device, and (b) physical properties of the sample. Communication between the transmitting device and the receiving device is performed by acquiring at least one of the at least one information to be expressed, generating an encryption key and a decryption key based on the acquired information , Transmission of data encrypted with the encryption key and decryption of the encrypted data using the decryption key are executed.

2-9. Detection In the above-described embodiment, the measurement unit 16 measures each component value, but instead of the measurement unit 16, a detection unit (or detection device) that detects the presence or absence of the component may be used. This detection part should just detect each component qualitatively, and does not need to quantify the quantity of each component. Alternatively, each component value may be measured, and the measured value may be compared with a predetermined threshold value to detect the presence or absence of each component. For example, the generation unit 111 assigns a numerical value “1” to the detected component and assigns a numerical value “0” to the component that has not been detected, and arranges these numerical values in a predetermined order. Since the numerical values arranged in this way are binary numbers, the generation unit 111 may generate a key based on the binary numbers.

2-10. Time Series Change In the above-described embodiment, the key generation method, the measurement method, and the encryption or decryption method are predetermined. In the above-described modification, these methods are determined according to the user's operation. However, these methods are not limited to user operations. For example, these methods may be determined according to time. Examples included in this embodiment are shown below.

(1) Schedule The storage unit 12 of the information transmission terminal 1 stores a plurality of types for the above-described method in advance, and a schedule that is set so as to change every day.
First, the control unit 11 of the information transmission terminal 1 on the transmission side acquires time information indicating the current time with reference to a built-in timer. And the control part 11 specifies the measurement method matched with today's date including the time which this time information shows with reference to said schedule, According to this measurement method, the some component contained in a sample is specified. Get the quantity.
Next, the control unit 11 refers to the above schedule, specifies a key generation method associated with today's date, and generates a key from the amount of the acquired component according to the generation method.
Thereafter, the control unit 11 refers to the above schedule, identifies the encryption method associated with today's date, encrypts the message according to this encryption method, and converts the encrypted data into the obtained encrypted data. Add today's date and send.
The information transmission terminal 1 on the receiving side specifies the measurement method, the key generation method, and the decryption method corresponding to the encryption date from the schedule stored in the storage unit 12, and measures the sample according to these. Then, a key is generated and the encrypted data is decrypted.

In this modification, the measurement method, the key generation method, and the encryption / decryption method change every day, but the rules of this change are known only to the respective users on the transmission side and the reception side. Therefore, the sample for use in encryption is not known in advance, and it becomes more difficult for an unauthorized user who does not know the rules of change to decrypt the encrypted data. The period associated with the method is not limited to one day, and may be another period (such as one week). Each method may be associated with a period of a different length.

(2) Period When the method changes periodically, the period only needs to be determined. For example, when two methods are used while being switched periodically, the first method may be adopted when the date is an odd day, and the second method may be adopted when the date is an even day.

(3) Calculation Calculations using numerical values indicating time may be performed on various measurement values used for key generation, such as component values and physical property values obtained by the measurement unit 16. For example, the key may be generated based on the obtained numerical value by multiplying the measurement result by the measurement unit 16 by a numerical value indicating the time when the measurement was performed. In this case, a numerical value representing this time may be added to the encrypted data encrypted using the generated key and transmitted. Since the operation (in this case, multiplication) when generating the key is kept secret, it is difficult for an unauthorized user to decrypt the encryption using the numerical value added to the encrypted data. Note that this calculation may be a combination of a plurality of functions.

2-11. Information Transmission Terminal In the above-described embodiment, the information transmission terminal 1 is a mobile phone that communicates with another information transmission terminal 1 via the communication network 2, but is a mobile phone, a PDA (Personal Digital Assistant), portable music. It may be a playback device, portable video playback device, game machine, electronic book browsing device, navigation device, personal computer, or the like.

2-12. FIG. 17 shows a communication system 100 according to an embodiment of the present invention. The communication system 100 includes a terminal 100A and a terminal 100B. The terminal 100A and the terminal 100B perform data transmission / reception via the Internet 400. The terminal 100A (100B) has a function as a general personal computer. Each terminal 100 is connected to a measuring apparatus 200 (200A, 200B) via a bus such as a USB.
Each measuring device 200 analyzes the sample when the container 300 (300A, 300B) containing the sample is set in accordance with the command output from each terminal 100, and the analysis result is sent to each terminal 100. Output.
When performing encrypted communication, the user of the terminal 100A and the user of 100B may contact the user in advance for the type of sample used for encryption / decryption, or when transmitting encrypted data, Information specifying the type of sample may be transmitted to the other party in an unencrypted state.

FIG. 18 shows a functional configuration of the terminal 100. The terminal 100 includes a control unit 110, a storage unit 130, an input unit 150, and a communication unit 160.

The storage unit 130 stores algorithm generation information in addition to data to be transmitted and received data. The algorithm generation information is information defining how to generate an encryption key from the analysis result of the sample. For example, if the analysis result includes multiple parameters such as the types of multiple compounds and the amount of each component (component ratio), how to use these parameters and how to generate the encryption key Information to be defined. Alternatively, for example, it is defined to “use the three weight values from the highest component ratio to the third and multiply these three values”.
Alternatively, when the analysis result includes only one value (for example, pH concentration or salinity concentration), it may be information defining how to process the value to generate a key. For example, when a value of “5.04” is acquired as a measurement result of pH (hydrogen ion concentration) from the analyzer, this value and other predetermined information (information accompanying measurement such as measurement date and time, measurement temperature, etc.) To generate a key in combination with information on measurement conditions and measurement environments). The algorithm generation information is determined in advance between the sender and the receiver before performing encrypted communication. Moreover, the type of sample to be used may be included in the algorithm generation information.
Note that the algorithm generation information may include information that the value of the analysis result is used as it is without being processed.
That is, at each terminal 100, at least the type of the sample needs to be specified so that the key generated when encrypting the transmission data and decrypting the reception data is uniquely determined for the other party performing the encrypted communication, and in addition, the analysis is performed. You may identify the method of using a key from a result.

The control unit 100 is realized by a processor such as a CPU, and includes a key generation unit 111, an acquisition unit 112, an encryption / decryption processing unit 113, and an algorithm 120.
The acquisition unit 112 outputs an analysis execution instruction to the analysis device 200, acquires an analysis result from the analysis device 200, and outputs the analysis result to the key generation unit 111. The key generation unit 111 generates a key necessary for encryption and decryption based on the analysis result and the algorithm generation information acquired from the acquisition unit 112 and based on the algorithm generation information, and sends the key to the encryption / decryption processing unit 113. Output. The key is, for example, an enumeration of numbers with predetermined digits. The encryption / decryption processing unit 113 encrypts transmission data using the key supplied from the key generation unit 111 according to a predetermined algorithm (AES or the like) and outputs the encrypted transmission data to the communication unit 160. Further, the received data provided from the communication unit 160 is decrypted using the key supplied from the key generation unit 111 according to a predetermined algorithm (AES or the like), and is output to the display unit 140 and the storage unit 130.
The algorithm specifying unit 120 reads the algorithm generation information from the storage unit 130 and outputs the algorithm generation information to the key generation unit 111.
The display unit 140 is a display device such as a liquid crystal display. The communication unit 160 is realized as a communication processor, transmits data output from the control unit 110, and outputs received data to the control unit 100. The input unit 150 is an input device that is operated by a user such as a keyboard and a mouse, and inputs commands to the control unit 100 and stores data in the storage unit.

FIG. 19 is a diagram illustrating an example of an operation when data is transmitted. In this example, the measuring

devices

200A and 200B are pH meters, and in the terminal 100A, as an algorithm generation method, the beverage Y is associated with the terminal 100B as an algorithm generation method, and the “measured value and measured date / time information is an algorithm. It is assumed that information (this is referred to as information X) “calculate according to A” is stored. In terminal 100B, information X is stored in association with terminal 100A. Now, a case where data is transmitted from terminal 100A to terminal 100B will be described.

The user of the terminal 100A designates data to be transmitted with the communication partner (terminal 100B) (S100). Subsequently, a key generation algorithm (information X) corresponding to the terminal 100B is determined (S102). In addition, when a different sample is to be used for each partner, at least a sample corresponding to the partner is specified. In addition to this, the key generation algorithm stored in the storage unit 130 in association with the communication partner may be read. Then, when the user sets the sample (here, beverage Y) in the analyzer 200 and performs a predetermined operation, the sample is analyzed (S104). When the analysis result is acquired, a key is generated based on the pH value and information X, which is the analysis result (S106). The data is encrypted using the generated key (S108), and the encrypted data is transmitted to the communication partner (S110). Note that the data transmission source information is plain text.

FIG. 20 is a diagram illustrating an example of an operation when receiving data. The terminal 100B receives the encrypted data (S200). When it is confirmed that the data transmission source is the terminal 100A, the information X including the beverage Y as a sample to be used is specified (S202). The user of the terminal 100B sets the beverage Y and inputs a sample analysis command (S204). Then, a key is generated (S206), data received using this key is decrypted (S208), and the decrypted data is displayed on the display unit and stored in the storage unit 130 (S200).
In this example, the communication partner only needs to have a device for measuring pH, so even if a high-performance but expensive device such as chromatography is not used, a key is generated based on information based on the components of the substance. Therefore, encrypted communication with high security can be realized easily.

Claims

An acquisition unit for acquiring information about one or more components contained in the sample;
A generating unit that generates a key based on the information acquired by the acquiring unit;
An encryption unit that encrypts data using the key generated by the generation unit to generate encrypted data;
An information transmission terminal comprising: a transmission unit that transmits the encrypted data generated by the encryption unit.
A receiving unit for receiving encrypted data;
An acquisition unit for acquiring information about one or more components contained in the sample;
A generating unit that generates a key based on the information acquired by the acquiring unit;
An information transmission terminal comprising: a decryption unit that decrypts the encrypted data received by the reception unit using the key generated by the generation unit.
A specifying unit for specifying a method for generating the key based on the information;
The information transmission terminal according to claim 1, wherein the generation unit generates the key according to a method specified by the specification unit.
A specifying unit for specifying a method for acquiring the information;
The information transmission terminal according to claim 1, wherein the acquisition unit acquires the information according to a method specified by the specification unit.
It has a specific part that specifies the encryption method,
The information transmission terminal according to claim 1, wherein the encryption unit encrypts the data according to a method specified by the specifying unit.
A specifying unit for specifying a decoding method;
The information transmission terminal according to claim 2, wherein the decrypting unit decrypts the encrypted data according to a method specified by the specifying unit.
An operation unit that accepts an operation for a user to select one option for each of a plurality of items to which a plurality of options are respectively assigned;
The information transmission terminal according to claim 3, wherein the specifying unit specifies the method according to a combination of options indicated by the operation received by the operation unit.
A time information acquisition unit for acquiring time information indicating the time,
The information transmission terminal according to claim 3, wherein the specifying unit specifies the method according to a period in which a time indicated by the time information is included.
Obtain information about one or more components contained in the sample from the measurement unit connected to the transmitter,
Generating a key based on the acquired information;
Encrypt data using the generated key to generate encrypted data,
An information transmission method for transmitting the generated encrypted data.
Receive encrypted data from the sending device,
Obtain information about one or more components contained in the sample from the measurement unit connected to the receiver,
Generate a key based on each of the acquired information,
An information transmission method for decrypting the received encrypted data using the generated key.
Identify a method for generating the key based on the information;
The information transmission method according to claim 9 or 10, wherein the key is generated according to the specified method.
Identify how to obtain the information,
The information transmission method according to claim 9 or 10, wherein the information is acquired according to the specified method.
Identify the encryption method based on the acquired information,
10. The information transmission method according to claim 9, wherein the data is encrypted according to the specified method.
Identify a decoding method based on the acquired information,
11. The information transmission method according to claim 10, wherein the encrypted data is decrypted according to the specified method.
The user accepts an operation of selecting one option for each of a plurality of items assigned with a plurality of options,
The information transmission method according to claim 11, wherein the method is specified according to a combination of options indicated by the received operation.
Get time information indicating the time,
The information transmission method according to claim 11, wherein the specifying unit specifies the method according to a period including a time indicated by the time information.
Obtaining information about one or more components contained in the sample in each of the transmitter and receiver;
Generating an encryption key and a decryption key based on the acquired information,
In communication between the transmission device and the reception device, transmission of data encrypted using the encryption key and decryption of the encrypted data using the decryption key are executed. An information transmission method characterized by the above.