JP2007208388A - Mobile terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile terminal which can accurately execute authentication cost-effectively. <P>SOLUTION: The mobile terminal displays a code on its screen so as to inform a user about authentication conditions when the user starts the authentication procedure (step S301). A plurality of music data registered in advance is reproduced from the mobile terminal (step S302). The user enters music data of a correct solution (step S303). When the user enters the music data of the correct solution, success in authentication is judged (step S304: Yes), and operation permission is granted to the user (step S305). Meanwhile, when the user does not enter the music data of the correct solution, failure in the authentication is judged (step S304: No). Finally, when the user selects for second authentication (step S306: Yes), after returning to the step S302, the authentication is again tried. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mobile terminal having a function of authenticating a user.

Conventionally, as a method for authenticating a user of a portable terminal such as a cellular phone, biometric authentication using information such as a method for requesting input of a password or a fingerprint is known. Patent Document 1 discloses an authentication method in which a player (user) hears a plurality of sounds having different frequencies and selects a sound having a predetermined frequency.
JP 2002-215144 A

  However, in the conventional authentication method described above, for example, when a password is leaked in the method of inputting a password, the security of the mobile terminal cannot be maintained, and in the method using biometric authentication, the operational cost and the privacy protection at the time of loss of biometric information are lost. There was a problem. In addition, since the authentication method described in Patent Document 1 is a method for evaluating the user's sensation, there is a problem that a person with good sensation can be authenticated even if he / she is not a regular user.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a portable terminal that can perform authentication at low cost and accurately.

  The present invention has been made to solve the above problems, and the invention according to claim 1 is directed to an instruction input means for inputting a user instruction, a music data holding means for holding music data, and the instruction. Based on the authentication condition input through the input means, the original music data held by the music data holding means is adjusted, and the authentication data creating means for creating a plurality of authentication data and the authentication data creating means Authentication data reproduction means for selecting and reproducing some of the plurality of authentication data, and authentication determination based on input via the instruction input means after or during reproduction of the authentication data in the authentication data reproduction means It is the portable terminal characterized by comprising the authentication determination means which performs.

  The invention according to claim 2 is the invention according to claim 1, wherein the authentication data creating means adjusts any one of a tone color, a release time, a scale, a tonality, and a tempo of the original music data. In this way, a plurality of authentication data is created.

  The invention according to claim 3 is the invention according to claim 1, wherein the authentication data creating means adjusts the type or level of the effect effect to be added to the original music data. It is characterized by creating authentication data.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the authentication data creating means creates a plurality of authentication data by adjusting the position or movement method of the virtual sound source in the stereophonic sound effect. It is characterized by that.

  Further, in the invention according to claim 5, in the invention according to any one of claims 1 to 4, the timing for inputting the user's instruction from the instruction input means in the authentication determination means, The apparatus further comprises an input timing designating unit for designating the reproduction state of the authentication data.

  Further, in the invention described in claim 6, in the invention described in any one of claims 1 to 5, the authentication condition used for authentication is notified to the user in the playback state of the terminal before the authentication is started. The authentication condition notifying means is further provided.

  According to a seventh aspect of the present invention, there is provided an instruction input means for inputting a user instruction, a vibration data holding means for holding vibration data, a vibrator that vibrates based on the vibration data, and the instruction input means. Based on the authentication condition input via the authentication data creation means for adjusting the original vibration data held by the vibration data holding means and creating a plurality of authentication data, and created by the authentication data creation means Authentication data reproduction means for selecting and reproducing some of a plurality of authentication data, and authentication determination based on input via the instruction input means after reproduction of authentication data in the authentication data reproduction means or during reproduction It is a portable terminal characterized by comprising an authentication determination means.

  According to the first to fourth aspects of the present invention, since it can be realized by adding a function for adjusting music data to a conventional portable terminal, it is less expensive than conventional biometric authentication or the like. It is feasible. In addition, because authentication conditions and candidate data for authentication can be created in various ways, it is possible to adjust the strength of safety and to set the stage, and to use the fields with high user identification capabilities to ensure the strength of authentication. Can be raised. Furthermore, since the authentication method is performed using hearing, even if the user is a visually impaired person, authentication can be performed accurately.

  Further, according to the invention described in claim 5, since it is possible to specify the timing when the user performs authentication input, it is possible to more accurately authenticate only authorized users who know the timing of performing authentication input.

  Further, according to the invention described in claim 6, since it is possible to notify the user of the authentication condition in the reproduction state of the terminal before performing authentication, the correspondence between the reproduction state of the terminal and the authentication condition It is possible to reduce the difficulty of authentication for a regular user who knows.

  According to the seventh aspect of the present invention, the same effect as in the first to fourth aspects can be obtained by using vibration data instead of music data as a candidate for authentication.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing a configuration of a mobile terminal according to an embodiment of the present invention. In FIG. 1, a CPU 1 is a CPU (Central Processing Unit) that controls each unit in the mobile terminal.

  The RAM / ROM unit 2 is a RAM (Random Access Memory) that provides a memory area used by the CPU 1 and a ROM (Read Only Memory) that holds programs executed by the CPU 1. The timer 3 is a timer that measures time.

  The music information holding unit 4 (music data holding means) holds music data (music data) to be played back on the mobile terminal. The authentication data creation unit 5 (authentication data creation means) creates information used for user authentication, and details will be described later. The display control unit 6 inputs display data output from the CPU 1 and converts it into a format that can be displayed on the display unit 7. The display 7 receives display data converted by the display control unit 6 and displays information such as characters and images.

  The performance control unit 8 (authentication data reproducing means) inputs the music data stored in the music information holding unit 4, converts it into an analog signal, and outputs it to the speaker 9. The speaker 9 generates an analog signal input from the performance control unit 8. The operation unit 10 detects the state of the operation device 11 based on a signal output from the operation device 11 and outputs the detection result to the CPU 1. The operation device 11 (instruction input means) detects an input operation by a user and outputs it to the operation unit 10.

  Next, the operation of the above-described embodiment will be described with reference to FIGS. FIG. 2 is a flowchart showing a procedure for the user to set the authentication condition by operating the portable terminal, and FIG. 3 is a flowchart showing a procedure for the user to authenticate the portable terminal.

  In FIG. 2, in the procedure for setting the authentication condition, first, the user prepares original data for creating data for authentication (step S201). The original data is original music data held by the music information holding unit 4 in FIG. 1, and is performance information data such as SMAF (registered trademark) or SMF (Standard MIDI File) format, for example.

  Subsequently, when the user designates a condition for creating authentication data via the operation device 11, the authentication data creation unit 5 adjusts the original data prepared in step S201 according to the designated condition, and selection candidates for authentication. Are created (step S202, authentication data creation means).

  The adjustment to the music data performed here can increase the safety strength of the mobile terminal by making the adjustment user recognize the difference from the original data. A specific method of creating music data that is a selection candidate in authentication will be described later with reference to FIGS.

  Finally, when the user designates correct song data from the plurality of song data created in step S202 via the operation unit 11, the authentication data creation unit 5 selects a plurality of song data, authentication conditions, and correct answers as selection candidates. Registration is performed in association with the music data to be (step S203). Here, a plurality of pieces of music data as correct answers may be designated instead of one. Although the authentication condition setting procedure is completed as described above, a plurality of authentication conditions can be set by repeatedly executing the procedure of FIG.

  Next, a procedure for authenticating the mobile terminal will be described with reference to FIG. When the procedure for authenticating the user is started, first, the authentication data creating unit 5 selects the authentication condition to be used this time from one or more registered authentication conditions, and notifies the user of the authentication conditions (step) S301, authentication condition notification means).

  The notification method in step S301 uses a method in which a code corresponding to the authentication condition is registered in the mobile terminal in advance and the code corresponding to the authentication condition is displayed on the display unit 7. For example, if the authentication condition related to the timbre is the code “1” and the authentication condition related to the effect is “2”, the authentication data creation unit 5 displays the code “1” on the display unit 7 when performing the authentication related to the timbre.

  As another method of notifying the authentication condition, a method of associating the authentication condition with a sound (melody) and notifying the authentication condition by a reproduced sound is also possible. Also, prepare the same timbre with long and short release lengths, and the timbres with the long release length corresponding to “1” and the short ones corresponding to “0”, “0” and “1” A method of notifying the user of authentication condition information by combining binary values is also possible.

  Returning to FIG. 3, when the authentication condition notification to the user is completed, the authentication data creation unit 5 randomly selects and reproduces music data registered as selection candidates in the authentication condition (step S302, authentication data). Reproduction means). Here, the number of music data to be selected and played back is arbitrary, and even if all the music data registered as selection candidates are played back, only a part is played back, or only one is played back. Good.

  When the reproduction is finished, the user inputs the reproduction number of the music data as an answer from the operation unit 11 when the correct music data is reproduced, and answers that there is no correct answer when the correct music data is not reproduced. Is input from the operation device 11 (step S303).

  When the reproduction of the music data is completed, the authentication data creation unit 5 inputs the user's answer from the operation unit 11 via the operation unit 10 and performs authentication determination (step S304, authentication determination unit). Authentication is performed when the correct music data is reproduced in step S302 and the user answers the reproduction number of the music data, and when the user does not reproduce the correct music data in step S302 and the user answers that there is no correct answer. Succeeds (step S304: Yes).

  If the authentication is successful, the user is permitted to operate the portable terminal (step S305), and the authentication procedure is terminated. When the authentication is successful, useful information may be provided in advance at the next authentication in order to reduce (simplify) the difficulty of continuous authentication. For example, when the adjustment of music data is used as an authentication condition, it is possible to reduce the difficulty level of the next authentication by reproducing a part of music data that is correct after successful authentication.

  On the other hand, when the correct music data is reproduced in step S302 and the user does not answer the reproduction number of the music data, the correct music data is not reproduced in step S302. If the reproduction number of the music data is designated (without designation), the authentication fails (step S304: No).

  If the authentication fails, the user selects whether to retry the authentication (step S306). When the user selects not to retry (step S306: No), the authentication procedure is terminated.

  On the other hand, when the user selects to retry the authentication, the process returns to step S302 again to repeat the authentication procedure. Note that the music data reproduced from the mobile terminal at the time of the retry may be the same as that at the first authentication, or may be music data selected at random again.

  Next, a specific method of creating music data in step S202 of FIG. 2 will be described with reference to FIGS. FIG. 4 shows an example of MIDI format sequence data. In FIG. 4, Channel Volume in the third to fifth lines represents the volume of each channel, and 3D position in the seventh to ninth lines is designation regarding the position and movement of the virtual sound source.

  Bank Change and Program Change in the 11th to 16th lines specify the timbre of each channel, and 3D ch Assign in the 17th to 19th lines specifies the movement of the virtual sound source performed for each channel in the above 3D position. This is specified in conjunction with.

  Next, an example of changing the timbre will be described as a first example of creating music data used for authentication. The timbre can be changed by changing the value of Program Change shown in FIG. In this embodiment, when Program Change is 0, the tone is generated by the tone of the Grand Piano, when it is 1, it is Brite Piano, when it is 2, it is Electric Piano, and when it is 3, it is Electric Piano.

  When the timbre of channel 0 of the original data is Grand Piano (Program Change is 0) as shown in FIG. 4, the timbre is changed to Brite by replacing the value in the description column of the 12th row from 0 to 1, 2, 3. Three types of music data can be created: music data changed to Piano, music data whose tone has been changed to Electric Grand Piano, and music data whose tone has been changed to Electric Piano.

  As a second example of creating music data used for authentication, an example of changing the position of a virtual sound source will be described. The position of the virtual sound source is determined by the 3D position and 3D ch Assign shown in FIG. 4. In the example of FIG. 4, all of channels 0, 1, 2 are 2 from the current virtual sound source position and the azimuth angle is −30 degrees. Move to a position with an elevation angle of 0 degrees in 2000 ms. That is, after 2000 ms from the start of reproduction, the virtual sound sources of all the channels are located at an azimuth angle of -30 degrees (front left side).

  When the position of the virtual sound source of the original data is azimuth angle -30 degrees (left front), the virtual sound source position is positioned in front of the front by rewriting the azimuth angle of the 3D position in the seventh row to 0 degrees and +30 degrees. It is possible to newly create two types of music data, and music data in which the position of the virtual sound source is located on the front right side.

  As a similar example using a virtual sound source, a method of creating different music data by changing the moving method of the virtual sound source will be described with reference to FIGS. FIG. 5 is a diagram in which sequence data similar to that in FIG. 4 is extracted from the portion related to the position of the virtual sound source of channel 0 and displayed.

  In FIG. 5, the virtual sound source of channel 0 is localized at a position of distance 2, azimuth angle −30 degrees (front left), and elevation angle 0 degrees (point A in FIG. 6) at the time of 500 ms according to the instruction on the 20th line. 500 ms later, in response to the instruction in the 21st line in FIG. 5, the virtual sound source moves from the point A in FIG. 6 to a position at a distance of 2, an azimuth angle of 90 degrees (right side), and an elevation angle of 0 degrees in a time of 2000 ms (FIG. 6). B point). That is, the virtual sound source of channel 0 of the music data shown in FIG. 5 moves linearly from point A to point B in FIG.

  On the other hand, FIG. 7 is also a diagram in which the sequence data similar to FIG. 4 is extracted and displayed with respect to the position of the virtual sound source of channel 0. In FIG. 7, the virtual sound source of channel 0 is localized at a position of distance 2, azimuth angle 30 degrees (front right side), and elevation angle 0 degrees (point A1 in FIG. 8) at the time of 500 ms according to the instruction on the 20th line.

  Thereafter, at time 2500 ms, the virtual sound source moves to a position of distance 2, azimuth angle 90 degrees (right side), and elevation angle 0 degrees from point A1 in FIG. 8 A2 point). Subsequently, at time 4500 ms, according to an instruction on the 22nd line in FIG. 7, the virtual sound source moves to a position at a distance of 2, an azimuth angle of 150 degrees (right rearward), and an elevation angle of 0 degrees from point A2 in FIG. (A3 point in FIG. 8).

  Further, at time 6500 ms, according to the instruction on the 23rd line in FIG. 7, the virtual sound source moves to a position at a distance of 2, an azimuth angle of −150 degrees (left rear), and an elevation angle of 0 degrees from point A3 in FIG. (A4 point in FIG. 8). Further, at the time of 8500 ms, according to the instruction in the 24th line of FIG. 7, the virtual sound source moves from the point A4 in FIG. 8 to the position of distance 2, azimuth angle −90 degrees (left side), and elevation angle 0 degrees in a time of 2000 ms ( (A5 point in FIG. 8).

  Further, at time 10500 ms, according to the instruction in the 25th line in FIG. 7, the virtual sound source moves to a position at a distance of 2, an azimuth angle of −30 degrees (front left), and an elevation angle of 0 degrees from point A5 in FIG. (A6 point in FIG. 8). Further, at the time of 12500 ms, according to the instruction on the 26th line in FIG. 7, the virtual sound source moves to the position of the distance 2, the azimuth angle 30 degrees (front right side), and the elevation angle 0 degree from the point A6 in FIG. The point A1 in FIG. 8 is reached again.

  That is, the virtual sound source of channel 0 of the music data shown in FIG. 7 moves in a circle in the order of A1 point, A2 point,..., A6 point, A1 point in FIG. Thus, 3D localization movement such as linear movement or circular movement of the virtual sound source can be used as the authentication condition. Alternatively, a plurality of pieces of music data in which the localization movement period is changed may be created, and the movement period may be used as the authentication condition.

  Furthermore, the position of the virtual sound source can be set for each channel, a plurality of pieces of music data in which the number of virtual sound sources having different positions is changed, and the number of virtual sound sources may be used as the authentication condition. For example, in the music data shown in FIG. 4, the same 3D position designation is assigned to three channels, and the number of virtual sound sources with different positions is one.

  On the other hand, if the position of the virtual sound source is changed by assigning another 3D position designation only to channel 0, the number of virtual sound sources with different positions will be two, and each of the three channels will have a different number. If the designation of 3D position is assigned, the number of virtual sound sources with different positions will be three.

  In addition, the number of virtual sound sources having different positions is changed during the reproduction of the music data, and the method of the change (for example, the number of virtual sound sources that were one at the start of reproduction is increased to two and then returned to one) ) May be created, and the method of changing the number of virtual sound sources may be used as the authentication condition.

  As another example of creating music data used for authentication, the tone color parameter of the original data can be adjusted to create a plurality of music data with different release times, and the release time can be used as an authentication condition. Further, music data in which a dissonance note is added to the original data and music data in which a consonance note is added may be created, and the type of the added note may be used as the authentication condition.

  Alternatively, the original data may be divided into sections, a plurality of pieces of music data having different sections in which the above-described tone color change, release time change, and note addition are made may be created, and the changed sections may be used as authentication conditions. In this case, for example, the correct answer is the third interval. Also, a plurality of new music data may be created by dividing the original data into a plurality of pieces according to the composition of the music, and the phrase condition may be used as the authentication condition. In this case, for example, the correct answer is a chorus phrase. In addition, conditions such as scale, tonality, tempo, and constant change of tempo such as gradually increasing the tempo in the music may be used as the authentication condition.

  Further, not only the adjustment of music as described above is used as an authentication condition, but also the type and level of the effect effect applied to the original data can be used as the authentication condition.

  Further, as the authentication data, a vibration pattern that is data for vibrating the vibrator is used instead of the music data, and a plurality of vibration patterns may be prepared and used as the authentication condition. Further, a vibration time per vibration or a vibration cycle may be used as the authentication condition. When the vibration is performed in synchronization with the reproduction of the music data, the time for performing the vibration in synchronization may be set as the authentication condition.

  The above-described authentication in the portable terminal can be realized by adding a function of adjusting music data or vibration pattern to the conventional portable terminal, and thus can be realized at a lower cost than conventional biometric authentication. .

  In addition, because authentication conditions and candidate data for authentication can be created in various ways, it is possible to adjust the strength of safety and to set the stage, and to use the fields with high user identification capabilities to ensure the strength of authentication. Can be raised. Therefore, even when the user is a visually impaired person, the authentication can be accurately performed by selecting the authentication condition using the music data.

  Next, with reference to FIG. 9, a mobile terminal authentication system including a mobile terminal and a server will be described. In FIG. 9, mobile terminals A, B, and C are mobile terminals used by the same user and have the same configuration as shown in FIG.

  The base station 30 is a base station that communicates with the mobile terminals A, B, and C. The large-scale network 40 is a network that mutually connects the base station 30 and the distribution servers α and β. The distribution servers α and β are servers that manage information related to authentication in the mobile terminals A, B, and C.

  When the user registers authentication conditions and authentication candidate data on the mobile terminal A by the same method as in the flowchart of FIG. 2, the registered information is transmitted via the base station 30 and the large-scale network 40, for example, the distribution server α. Sent to. The distribution server α manages authentication conditions and authentication candidate data based on the transmitted registration information. Thereafter, when the user authenticates with the mobile terminal A, the mobile terminal A connects to the distribution server α, and acquires information about the authentication condition and authentication candidate data.

  In this way, by managing the authentication condition and the data information as authentication candidates not by the portable terminal A but by the distribution server α, the distribution server can be used even at the time of authentication in the other portable terminals B and C possessed by the user. By acquiring the authentication condition and the information of the authentication candidate data from α, the authentication can be performed under the same conditions as the portable terminal A.

  Further, as described in step S305 in FIG. 3, information that is useful for the next authentication after the successful authentication at the mobile terminal A is managed by the distribution server α, so that the information is authenticated at the mobile terminal B and the mobile terminal C. It can be useful sometimes.

  As mentioned above, although embodiment of this invention was explained in full detail, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included. For example, the original data is not limited to performance information data, and may be any music data such as audio data. In this embodiment, the example in which the user performs authentication input after playing music data that is a candidate for the authentication condition has been described. However, the authentication input is performed when the authentication condition is satisfied during music data playback. By doing so, security may be improved.

  Alternatively, a plurality of authentication conditions may be set, and input conditions and input timings may be designated. For example, the type of music data can be specified as an input condition, and the timing at which the positions of virtual sound sources are combined can be specified as an input timing (input timing specifying means). In addition, the creation of the authentication condition is not only performed by the user, but may be automatically created by randomly creating authentication conditions and authentication candidate data on the mobile terminal. Further, the success / failure of the authentication in the present embodiment may be used for the success / failure of the game instead of the user authentication.

  The present invention is suitable for use in a mobile terminal having a function of authenticating a user.

It is a block diagram which shows the structure of the portable terminal which concerns on embodiment of this invention. It is a flowchart which shows the procedure in which a user operates the portable terminal of FIG. 1 and sets authentication conditions. It is a flowchart which shows the procedure in which a user authenticates the portable terminal of FIG. It is a figure which shows an example of the sequence data of a MIDI format. It is a figure which shows an example of the sequence data of the MIDI format whose movement of a virtual sound source is a linear movement. It is a figure which shows the movement of the virtual sound source in the sequence data of FIG. It is a figure which shows an example of the sequence data of a MIDI format whose movement of a virtual sound source is circular movement. It is a figure which shows the movement of the virtual sound source in the sequence data of FIG. It is a figure which shows the portable terminal authentication system comprised with a portable terminal and a server.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... CPU, 2 ... RAM / ROM, 3 ... Timer, 4 ... Music information holding part (music data holding means), 5 ... Authentication data creation part (authentication data creation means), 6 ... Display control part, 7 ... Display , 8 ... Performance control unit (authentication data reproducing means), 9 ... Speaker, 10 ... Operation unit, 11 ... Operation device (instruction input means), 21.22.23 ... Portable terminal, 30 ... Base station, 40 ... Large scale Network, 51/52 ... distribution server

Claims (7)

Instruction input means for inputting user instructions;
Music data holding means for holding music data;
Authentication data creation means for adjusting the original music data held by the music data holding means based on the authentication condition input via the instruction input means and creating a plurality of authentication data;
Authentication data reproducing means for selecting and reproducing some of the plurality of authentication data created by the authentication data creating means;
A portable terminal comprising: an authentication determination unit that performs an authentication determination based on an input through the instruction input unit after the authentication data is reproduced by the authentication data reproduction unit or during the reproduction.   2. The authentication data creating means creates a plurality of authentication data by adjusting any one of a tone color, a release time, a scale, a tonality, and a tempo of the original music data. Mobile device.   2. The portable terminal according to claim 1, wherein the authentication data creating means creates a plurality of pieces of authentication data by adjusting a type or level of effect effect added to the original music data.   The mobile terminal according to claim 1, wherein the authentication data creating unit creates a plurality of authentication data by adjusting a position or a moving method of the virtual sound source in the stereophonic sound effect.   5. The input timing designation means for designating a timing at which a user instruction is inputted from the instruction input means in the authentication determination means by a reproduction state of the authentication data. The mobile terminal according to any one of the items.   6. The authentication condition notifying unit according to claim 1, further comprising an authentication condition notifying unit for notifying a user of an authentication condition to be used for authentication in a playback state of the terminal before starting authentication. Mobile devices. Instruction input means for inputting user instructions;
Vibration data holding means for holding vibration data;
A vibrator that vibrates based on the vibration data;
Based on the authentication condition input via the instruction input means, the original vibration data held by the vibration data holding means is adjusted, and authentication data creating means for creating a plurality of authentication data;
Authentication data reproducing means for selecting and reproducing some of the plurality of authentication data created by the authentication data creating means;
A portable terminal comprising: an authentication determination unit that performs an authentication determination based on an input through the instruction input unit after the authentication data is reproduced by the authentication data reproduction unit or during the reproduction.

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