KR20150041569A - Signature registration method, signature authentication method and apparatus thereof - Google Patents

Abstract

The present invention introduces a signature registration system which features: an input unit to enter a signature, a detection unit to detect the state of the signature registration apparatus while signature is being inputted, an archive unit to register the signature entered, and a control unit to save data of the state of the detected signature registration apparatus and the signature entered.

Description

TECHNICAL FIELD [0001] The present invention relates to a signature registration method, a sign authentication method,

The present invention relates to a method for registering a signature for authentication, a method for authenticating a signature by calculating a degree of matching with a registered signature, a signature registration apparatus, and a signature authentication apparatus.

Signatures are used as a way to verify that the user accessing the digital device is a privileged user. Especially, mobile devices such as a mobile phone equipped with a touch screen having touch input means, a portable media player (PMP), a personal digital assistant (PDA), a portable game machine, a digital camera, a digital camcorder and an e-book are used The signature is used as a way to authenticate the user that is trying to authenticate. However, since the mobile device is often used or moved by the user while moving, the performance of the signature recognition is lower than that of the device using the fixed position. In addition, when registering the signature for the first time and when attempting to authenticate the user for use of the device, the state of the device changes according to the user's posture and the input data may be changed. In this case, There is a tendency.

The present invention relates to an apparatus and method for registering a signature, and a signature authenticating apparatus and method using information on the attitude of the user or the state of the apparatus at the time of inputting a signature, in addition to the information about the inputted signature.

A signature registration apparatus according to an embodiment of the present invention includes an input unit for receiving a signature, a sensing unit for sensing the state of the signature registration apparatus, a storage unit, information on the state of the sensed signature registration apparatus, And a control unit for storing information about a signature in the storage unit, wherein the state of the signature registration apparatus includes one of a fixed state and a holding state.

The sensing unit may include a sensor for sensing at least one of a slope and an acceleration of the signature registration device.

The controller may determine the state of the signature registration apparatus to which the signature is input to be fixed, when the slope of the detected signature registration apparatus is within a predetermined range.

The control unit may determine the state of the signature registration apparatus to which the signature is input to be fixed, when the acceleration of the signature registration apparatus is varied within a predetermined range.

A signature registration method in a signature registration apparatus according to an embodiment of the present invention includes: receiving a signature; Determining a state of the signature registration apparatus sensed using a sensor; And storing information about the state of the signature registration apparatus and information about the inputted signature, wherein the state of the signature registration apparatus includes one of a fixed state and a holding state.

A signature authentication apparatus according to an embodiment of the present invention includes an input unit for inputting a signature of a user, a detection unit for detecting the state of the signature authentication apparatus to which the signature is input, Information about a state of the signature registration apparatus, a signature inputted through the input unit, and information about a state of the signature authentication apparatus sensed by the sensing unit Wherein the state of the signature registration apparatus includes one of a fixed state and a holding state, and the state of the signature authentication apparatus includes one of a fixed state and a holding state .

The control unit according to an embodiment of the present invention may further include a signature verification unit that, when the device status and signature verification apparatus status are different from each other when the signature registration is performed, You can change the weight.

The control unit according to an embodiment of the present invention can change the authentication success threshold value used for authentication of the input signature when the state of the device when the signature is registered and the state of the signature authentication apparatus are different.

The controller according to an embodiment of the present invention may change the authentication success threshold value used for authentication of the input signature downward when the device status in the signature registration and the state of the signature authentication device are in the holding state have.

A signature authentication method in a signature authentication apparatus according to an embodiment of the present invention includes: receiving a signature of a user; determining a state of the signature authentication apparatus to which the signature is input by a sensor; And authenticating the input signature by using information on a previously registered signature, device status, and information on the input signature and the status of the signature authentication apparatus, wherein the device state Includes one of a fixed state and a holding state, and the state of the signature authentication apparatus includes one of a fixed state and a holding state.

The signature authentication apparatus according to an embodiment of the present invention includes an input unit for inputting a signature of a user, a pre-stored registration signature for signature registration, a storage unit for storing information on the user state, And a communication unit for receiving the registered signature, information on the user state, signature input through the input unit, and information on the user state received through the communication unit, And a control unit for authenticating the user.

A signature authentication method in a signature authentication apparatus according to an embodiment of the present invention includes a step of receiving a signature of a user, a step of receiving information on a user state from a wearable device, a pre- And authenticating the input signature using information on the stored user state and information on the user state received from the wearable device.

A signature authenticating apparatus according to an embodiment of the present invention includes an input unit for inputting a signature of a user, a sensing unit for sensing a state of the signature authenticating apparatus to which the signature is input, a pre-stored registration signature in sign registration, , A communication unit for receiving information on the user state from the wearable device, a storage unit for storing the pre-stored registration signature, information on the user status, and information on the device status And a control unit for authenticating the input signature using information about the user state received through the communication unit and information about the device status received from the sensing unit.

A signature authentication method in a signature authentication apparatus according to an embodiment of the present invention includes receiving a signature of a user, receiving a status of the apparatus sensed by a sensor, receiving information on a user status from a wearable apparatus A pre-stored registration signature when registering a signature, information on a pre-stored user status, information on a pre-stored device status, information on the input signature and the user status received from the wearable device, And authenticating the input signature using information on the state of the signature.

1A is a block diagram illustrating a signature registration apparatus according to an embodiment of the present invention.
1B is a block diagram illustrating a signature authentication apparatus according to an exemplary embodiment of the present invention.
2 is a flowchart illustrating a signature registration method according to an embodiment of the present invention.
3A and 3B are diagrams for explaining states of a signature registration apparatus and / or a signature authentication apparatus according to an embodiment of the present invention.
4 is a flowchart illustrating a signature authentication method according to an embodiment of the present invention.
5 is a flowchart for explaining a signature registration and authentication method according to an embodiment of the present invention.
6 is a diagram for explaining an operation between a device and a wearable device related to another embodiment of the present invention.
7 is a block diagram illustrating an apparatus and a wearable apparatus according to another embodiment of the present invention.
8 is a flowchart for explaining a device signature registration and authentication method according to another embodiment of the present invention.
9 is a flowchart for explaining a device signature registration and authentication method according to another embodiment of the present invention.
10 to 13 are views for explaining an example of a device signature registration and authentication method according to another embodiment of the present invention.

The terms used in this specification will be briefly described and the present invention will be described in detail.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the terms used in the present invention should be interpreted based on the meanings of the terms, not on the names of simple terms, and on the contents of the present invention throughout the present invention.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements, without departing from the spirit or scope of the present invention. Also, the terms " part ", "... module ", etc. in the specification mean units for processing at least one function or operation, and may be implemented in hardware or software, .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

FIG. 1A is a block diagram illustrating a signature registration apparatus according to an exemplary embodiment of the present invention, and FIG. 1B is a block diagram illustrating a signature authentication apparatus according to an exemplary embodiment of the present invention.

The signature registration apparatus and the signature authentication apparatus may be physically implemented as a single apparatus, but may be separate apparatuses. Typically, a user registers a signature through the device and enters a signature for authorization to use the same device. In this case, the signature registration apparatus and the signature authentication apparatus are implemented in the same apparatus. The signature registration device and / or the signature authentication device may be a mobile device such as a mobile phone, a portable media player (PMP), a personal digital assistant (PDA), a portable game machine, a digital camera, a digital camcorder, But is not limited thereto, and may be a computing device equipped with a processor capable of processing registration and authentication of signatures.

Referring to FIG. 1A, the signature registration apparatus 100 is a device having a function of initially registering a signature to be used for authentication by a user, or changing a signature that has already been registered. The signature registration apparatus 100 may include an input unit 110, a registration control unit 120, a sensing unit 130, and a storage unit 140.

The input unit 110 receives a signature from a user. The input unit 110 may be implemented by touch input means, but not limited thereto, and may be implemented by another input means such as a mouse. When the input unit 110 is implemented by touch input means, the signature registration device 100 may include a touch screen (not shown). A touch screen (not shown) may include a touch panel for receiving a touch and a display screen for displaying a shortcut icon or displaying a result corresponding to the received touch. The touch panel may include various input methods such as a resistance method, a capacitance method, an ultrasonic method, or an infrared method.

In order to prevent an unauthorized user from accessing or using the device 100, the user may select the signature registration menu on the device 100 and register the signature. The registered signature will be used to authenticate access to the signature registration device 100 or the signature authentication device 150 in the future.

The detection unit 130 is for detecting the state of the signature registration apparatus 100 while the signature is inputted. The state of the signature registration apparatus 100 is a condition or a situation that affects the signature input of the user. For example, when the signature registration apparatus 100 is in a fixed state, a moving state, Whether it is on a fixed table, in a user's hand, or in a shaky state.

The state of the signature registration apparatus 100 may depend on the posture of the user at the time of signature input. That is, the state of the signature registration apparatus 100 may vary depending on the attitude of the user handling the signature registration apparatus 100. For example, when the user places a signature registration device 100 on a table or inputs a signature for registration with the signature registration device 100 fixed without shaking, the signature registration device 100 is in a fixed state would. When the user inputs a signature for registration while holding the signature registration apparatus 100 in hand, the signature registration apparatus 100 will be in a grip state. For example, when a user registers a signature while holding the signature registration apparatus 100 in his / her hand, the signature registration apparatus 100 may be in a holding state.

The sensing unit 130 may include at least one of an orientation sensor for sensing a pitch of the signature registration device 100 and a speed sensor for sensing an acceleration. The pitch sensed by the direction sensor refers to the orientation or slope of the device 100. The orientation sensor can sense azimuth or yaw, pitch and roll corresponding to three dimensions of the device 100 (e.g., three axes being x, y, and z axes) have. The speed sensor is for sensing the degree of movement of the device 100. The speed sensor can sense a degree of motion, for example, a change in speed with time or a change in distance with time. The direction of the apparatus 100 can be calculated using a direction sensor and a velocity sensor. The movement of the apparatus 100 may also be calculated using a direction sensor and a velocity sensor.

The sensing unit 130 sensing the direction and / or motion of the device 100 may include a proximity sensor, an acceleration sensor, a gyro sensor, or a terrestrial magnetism sensor .

The storage unit 140 may store the signature input by the user. The information about the entered signature may include the shape of the signature, the speed of the signature input, and / or the pressure at the input being sensed. Also, information on the state of the signature registration apparatus 100 sensed by the sensing unit 130 while the signature is being input is also generated by the registration control unit 120 and stored in the storage unit 140. For example, the storage unit 140 may store information on the slope (or pitch) or the acceleration of the signature registration apparatus 100. In addition, the storage unit 140 may store information on the state of one of the fixed state and the holding state of the signature registration apparatus 100.

The registration control unit 120 generates information on the status of the device 150 while the signature to be registered is inputted using the information acquired by the sensing unit 130, And information on the input signature in the storage unit 140. [

Both the registration control unit 120 of the signature registration apparatus 100 and the authentication control unit 170 of the signature authentication apparatus 150 can be implemented as processors and the signature registration apparatus 100 and the signature authentication apparatus 150 can be implemented as one A single controller including a processor may serve as the registration controller 120 and the authentication controller 170. In this embodiment, the signature registration apparatus 100 shown in FIG. The signature authentication apparatus 150 shown in FIG.

The registration control unit 120 can determine the device state during the signature input using at least one of the pitch and the acceleration of the signature registration device 100 sensed by the sensing unit 130. [ For example, the registration control unit 120 determines the state of the device while the signature is being inputted using both the pitch and the acceleration of the signature registration device 100 sensed by the sensing unit 130, or both the pitch and the acceleration . An example of a device state is a fixed state or a grip state.

As shown in FIG. 3A, when the pitch of the device 100 is close to 0 degrees on the basis of a flat table, it is considered that the user inputs the signature with the device 100 placed on a flat table or floor In which case the state of the device 100 will be determined to be a fixed state.

As shown in FIG. 3B, when the pitch of the device 100 is within a predetermined range of 30 to 45 degrees on the basis of the flat table, a user who inputs a signature may be in a position holding the device 100 in his / her hand It may be assumed that a signature is being input, in which case the state of the device 100 will be judged as a hold state. It is obvious to a person skilled in the art that the range of 30 to 45 degrees is only one example, and other ranges which are judgment criteria can be used.

The registration controller 120 determines that the signature registration apparatus 100 is in a fixed state during the input of the signature if the pitch of the detected signature registration apparatus 100 is within a predetermined range (for example, -5 degrees to 5 degrees) And if not, determine that the device 100 is in the grip state.

The registration control unit 120 can check the stability of the sensor value output from the speed sensor and generate the posture information of the user, that is, the state information of the device 100. [ If the device 100 is in a fixed state, the sensor values may be entered equally or only stable changes during signing. If the device 100 is in the hold state, the sensor value will fluctuate from time to time as the device 100 is shaken while entering a signature.

The registration control unit 120 determines that the amount of change in the sensed acceleration varies within a predetermined range (for example, -1.5 = x-axis = 1.5 mm, -1.5 = y-axis = 1.5 mm, -1.5 = z- The signature registration device 100 determines that the signature registration device 100 is in a fixed state while the signature is being input, and if not (e.g., fluctuating from time to time), the device 100 is in a hold state You can decide. The predetermined range of the acceleration variation amount may be displayed including the gravitational acceleration unit (g) such as -0.1 g = x axis = 0.1 g. Changes in units may be applied to the remaining axes. It will be readily understood by those skilled in the art that a predetermined range of the amount of acceleration variation can be changed.

In determining the state of the apparatus 100, both the information about the pitch and the acceleration of the apparatus 100 may be used. For example, if the pitch of the signature registration device 100 placed on a reading desk that is inclined at a predetermined angle (e.g., 20 to 50 degrees) on a flat table is within a predetermined range (e.g., 10 to 60 degrees) , And the change amount of the sensor value received from the speed sensor is a stable change, the registration control unit 120 can determine the signature registration apparatus 100 to be in a fixed state during the signature input. When the pitch of the detected signature registration device 100 is within a predetermined range (for example, -5 to 5 degrees) and the amount of change of the sensor value received from the speed sensor changes frequently, the registration control section 120 The signature registration apparatus 100 can be determined to be in the held state while the signature is being input.

Referring to FIG. 1B, the signature authentication apparatus 150 is a device having a function of determining whether or not authentication is successful compared with a signature registered when a user inputs a signature to be used for authentication. The signature authentication apparatus 150 may include an input unit 160, an authentication control unit 170, a sensing unit 180, and a storage unit 190.

The input unit 160 receives a signature from a user. To use the locked device 150, the user enters a signature via the input 160. The input unit 160 may be implemented by touch input means, but is not limited thereto. When the input unit 160 is implemented by touch input means, the signature authentication apparatus 150 may include a touch screen (not shown). A touch screen (not shown) may include a touch panel for receiving a touch and a display screen for displaying a shortcut icon or displaying a result corresponding to the received touch. The touch panel may include various input methods such as a resistance method, a capacitance method, an ultrasonic method, or an infrared method.

The detection unit 180 detects the state of the signature authentication apparatus 150 while a signature for authentication is input. The state of the signature authentication device 150 affects the accuracy of the signature entered by the user. The sensing unit 180 may include at least one of an orientation sensor for sensing a pitch of the signature authentication device 150 and a speed sensor for sensing an acceleration. The sensing unit 180 may include a proximity sensor, an acceleration sensor, a gyro sensor, or a terrestrial magnetism sensor.

The storage unit 190 may store information on the signature registered by the user and the device status at the time of signature registration. The information about the entered signature may include the shape of the signature, the rate of signature input, and / or the pressure at the input being sensed. Further, the information about the signature input for authentication may include the shape of the signature, the speed of the signature input, and / or the pressure at the input being sensed.

The storage unit 190 may store information about the slope (or pitch) and / or the acceleration of the signature authentication apparatus 150. [ In addition, the storage unit 190 may store information on the state of one of the fixed state and the holding state of the signature authentication apparatus 150.

The storage unit 190 may store the weight for each feature. For example, the storage unit 190 may store a weight for each feature corresponding to a case where the information about the state of the signature authentication apparatus at the time of signature input and the information about the apparatus state at the time of signature registration are the same. In addition, the storage unit 190 may store a weight for each feature to be changed corresponding to the information about the state of the signature authentication apparatus at the time of signature input and the information about the apparatus state at the time of signature registration.

The storage unit 190 may store the authentication success threshold value. For example, the storage unit 190 may store a changed authentication success threshold value corresponding to a difference between the information on the state of the signature authentication apparatus at the time of signature input and the information about the apparatus state at the time of signature registration. In addition, the storage unit 190 may store a changed authentication success threshold corresponding to the information about the state of the signature authentication apparatus at the time of signature input and the information about the state of the apparatus at the time of signature registration.

The authentication control unit 170 generates status information of the device 150 while the signature is input by using the information acquired by the sensing unit 180. [ For example, the authentication control unit 170 uses at least one of the pitch and the acceleration of the signature authentication apparatus 150 to determine whether the signature authentication apparatus 150 is in the fixed state or the grip state during the signature input . The authentication control unit 170 can determine the device status while the signature is input by using one of the pitch and the acceleration of the signature authentication device 150 sensed by the sensing unit 160 or both the pitch and the acceleration. The status determination of the signature authentication apparatus 150 may be performed in the same or similar manner as the status determination of the signature registration apparatus 100. [

If the pitch of the signature authentication apparatus 150 is within a predetermined range, it can be determined that the signature authentication apparatus 150 is in a fixed state while the signature is input. If the pitch of the signature authentication apparatus 150 is within a predetermined range, it can be determined that the signature authentication apparatus 150 is in the grip state.

On the other hand, when the acceleration of the signature authenticating device 150 varies within a predetermined range, it can be determined that the signature authenticating device 150 is in the locked state while the signature is input, and otherwise, it can be determined that the signature was authenticated.

The authentication control unit 170 receives information about the registration signature stored in the storage unit 190 and the device status at the time of signature registration and the signature inputted through the input unit 160 for authentication and the signature authentication apparatus 150 The signature can be authenticated using information about the state. The authentication control unit 170 compares the registration signature and the inputted signature to calculate the matching degree, and compares the result of the matching degree calculation and the authentication success threshold value to determine whether or not the signature is authenticated. Information on the device state at the time of signature registration and information about the state of the signature authentication apparatus 150 when a signature is input for authentication can be referred to in the determination of the degree of matching and the authentication success or failure.

The authentication control unit 170 is used for calculating the authentication success threshold value and / or the matching degree according to the state information of the signature authentication apparatus 150 at the time of signature input and the apparatus state at the time of signature authentication stored in the storage unit 190 You can change the weight for each feature.

When both the device state at the time of signature input and the device state at the time of signature authentication are both fixed, since the accuracy of the signature input at the two points in time is high, the authentication routine using the set values without changing the authentication success threshold value or the weight for each feature, Will be performed.

According to the result of comparison between the information about the state of the signature authentication apparatus 150 at the time of signature input and the information about the state of the apparatus at the time of signature registration stored in the storage unit 190, And the weights of the features used for calculating the matching degree of the signature inputted for the authentication. Features used to calculate the matching of two signatures can include signature shape, speed of signature input, pressure at the input to be sensed, and so on. Each characteristic has a weight value indicating importance in the matching degree calculation. For example, when calculating the matching degree, the matching degree can be calculated by using the reference weights which basically set the weights of shape, speed, and pressure as 30, 30, and 40, respectively. The weight applied to the calculation of the matching degree may be a relative ratio such as 3: 3: 4. The sum of the weights applied to the calculation of the matching degree may be 100. Also, even when the authentication control unit 170 changes the weight for each feature, the sum of the weights may be equal to 100. [

Consider a case where a user registers a signature with the registration device 100 fixed on a flat surface and a user authenticates a signature with a standing posture holding the authentication device 150 in his / her hand. If the device state at the time of registration is fixed and the device state at the time of authentication is in the holding state, since there is a large probability that the pressure detected at the time of signature registration and the pressure detected at the time of authentication are varied, True Accept Rate, TAR) may be degraded. When a signature is registered in a fixed state and the signature is authenticated in the grip state, if the reference weight is used due to the difference between the pressure detected at the time of signature registration and the pressure detected at the time of signature authentication, the TAR may be lowered. The authentication control unit 170 may improve the authentication success rate by changing the weights (e.g., 30, 30, and 40) of the respective features to 35, 35, and 30 to calculate the matching degree. It is to be appreciated that the weight of each signature feature is only one example, and that the weight of each signature feature may be changed corresponding to the state of the device 150 (e.g., fixed state or holding state) It will be easily understood by those who have.

The authentication control unit 170 compares the information about the state of the signature authentication apparatus 150 at the time of signature input with the information about the state of the apparatus at the time of signing registration and compares the authentication success threshold value The authentication rate of the user can be increased. The authentication success threshold value is a reference value for determining whether authentication is successful when the registered signature and the signature inputted for authentication are similar to each other. For example, if the authentication success threshold is set to 80, and both the device status at the time of registration and the device status at the time of authentication are fixed, let the user's own authentication success rate, or TAR, be 97%.

On the other hand, when the device status is fixed at the time of registration, when the device status at the time of authentication is in the hold status, the accuracy of the signature input by the user is degraded and the authentication success rate of the user is lowered. On the contrary, the device status at the time of signature registration is in the hold state, but even if the device status is fixed at the time of authentication, the authentication success rate of the user himself or herself will be lowered. Accordingly, when the device status at the time of registration differs from the device status at the time of authentication, the authentication success rate of the user can be increased by decreasing the authentication success threshold value. For example, the authentication success threshold may be reduced from 80 to 70 when the device status at registration and the device status at authentication are different. In addition, the authentication success threshold may be reduced from 90 to 70 when the device status at the time of registration is different from the device status at the time of authentication.

Even when both the state of the signature authentication apparatus 150 at the time of signature input for authentication and the state of the apparatus at the time of signature registration are both in the state of being held, the accuracy of signature input by the user becomes poor and the authentication success rate of the user himself or herself may be lowered. Also, by lowering the authentication success threshold used for authentication of the signature, the authentication success rate of the user can be increased. For example, if the device status at the time of registration and the device status at the time of authentication are in the hold state, the authentication success threshold may be reduced from 80 to 65.

It is to be appreciated that the authentication success threshold value is one example and that the authentication success threshold value can be changed in response to the function or performance of the device 150 in the fixed and held states, .

2 is a flowchart illustrating a signature registration method according to an embodiment of the present invention.

First, a signature for registration is input from the user (S210). While the signature is being inputted, the state of the signature registration apparatus 100 according to the user's signature input posture or the posture of the user is determined (S220). As described above, the state of the signature registration device 100 can be determined according to the sensed slope of the device 100 at the time of signature input and / or the degree of movement sensed. Information about the state of the signature registration apparatus 100 is also stored while storing information about the input signature in the storage unit 140 (S230). The information about the signature may include information about characteristics of the signature, the speed of signature input, the pressure to be sensed, and the like. The information on the state of the signature registration apparatus 100 may include information on the direction and / or acceleration of the apparatus 100, or information indicating the fixed state or the grip state determined using the information.

3A and 3B are diagrams for explaining states of a signature registration apparatus and / or a signature authentication apparatus according to an embodiment of the present invention.

Referring to FIG. 3A, a user inputs a signature with the device 320 placed on a desk. If the pitch information is used to determine the state of the device 320, the pitch of the device 320 will be close to zero degrees and thus the state of the device 320 will be determined to be a fixed state. When determining the state of the device 320 using the acceleration information, the sensor value inputted from the velocity sensor of the device 320 will be the fixed same value, and therefore the state of the device 320 will be determined as a fixed state. When the state of the device 320 is determined using the acceleration information, the amount of change of the acceleration value corresponding to the device 320 is set to a predetermined range (for example, -1? X-axis? 1 ?, -1? Y- ≤ 1 ㎨, -1 ≤ z axis ≤ 1 ㎨), and thus the state of the device 320 can be determined as a fixed state.

The acceleration sensor can output a constant value to the control unit. When a change in acceleration occurs in the apparatus 320, the controller can determine the state of the apparatus 320 with the amount of change in acceleration. Further, the state of the apparatus 320 may be determined to be a fixed state or a grip state by using both the pitch and acceleration information of the apparatus 320.

It will be readily understood by those skilled in the art that the predetermined range can be changed according to the performance of the acceleration sensor and the performance of the apparatus.

Referring to FIG. 3B, the user inputs a signature with the hand 320 holding the device 320. When pitch information is used to determine the state of the device 320, the pitch of the device 320 will indicate an angle 330 of about 30 to 45 degrees rather than horizontal, . When the state of the device 320 is determined using the acceleration information, the sensor value inputted from the velocity sensor due to the movement of the device 320 may be a value that is frequently changed, and accordingly, the state of the device 320 is determined as the grip state Will be. Further, the state of the apparatus 320 may be determined to be a fixed state or a grip state by using both the pitch and acceleration information of the apparatus 320.

4 is a flowchart illustrating a signature authentication method according to an embodiment of the present invention.

A user who desires to use the device 150 inputs a signature to unlock the locked signature authentication device 150 (S410). While the signature is being input, the state of the signature authentication apparatus 150 is determined (S420). The state of the device 150 may be determined according to the sensed slope of the device 150 upon entering a signature and / or the degree of movement sensed. The information on the state of the device 150 may include information on the orientation or acceleration of the device 150, or information indicating a fixed state or grip state determined using the information. The signature information input at the time of authentication is compared with the signature registered by the user, and the success or failure of authentication is determined according to the comparison result (S430).

In authenticating the entered signature, information on the device status at the time of signature registration and information about the status determined in step S420 is referenced. For example, when both the device state at the time of registration and the device state at the time of authentication are fixed, authentication is performed by an authentication routine set to a basic value without changing the weight or the authentication success threshold value for each feature. In the case where both the device state at the time of registration and the device state at the time of authentication are both in the hold state, it is difficult to ensure the stability of the input data due to the shaking of the devices 100 and 150, . When the device state at the time of registration differs from the device state at the time of authentication, the data such as the pressure input at the time of signature registration and the signature at the time of authentication are changed, so that the weight for each feature for calculating the degree of agreement between signatures can be changed. Optionally, or with a weight change, the authentication success threshold may be changed. Statistically, when the user attitude at the time of registration differs from the user attitude at the time of authentication, the matching degree tends to be lowered.

FIG. 5 is a flowchart for explaining an embodiment of the present invention and related signature registration and authentication method, showing a method of registering a signature in one device and performing signature authentication for access to the device.

When the user inputs a signature (S510), information about the inputted signature is generated (S512). The information about the signature may include information such as the shape of the signature composed of touch coordinates, the signature input speed calculated by the time at which each touch coordinate is received, the pressure at the time of touch, and the like. While the signature is being input, information on the posture of the user, that is, the status of the device, is generated (S514). The user's posture can be classified into a fixed state or a grip state. It is determined whether the signature registration process is currently performed or not (S516). In the case of the signature registration procedure, the information about the signature and the information about the attitude of the user are stored in the storage unit 140 and the signature is registered (S518).

In the case of the signature authentication procedure, the information about the user attitude (for example, the status of the apparatus) at the time of registration and the registered signature are read from the storage unit 140 (S520). When the registration signature and the authentication signature match are calculated, the user attitude information in the signature verification procedure and the user attitude information in the signature registration procedure are referred to, and the weight for each feature of the signature is changed (S522). The authentication success threshold value is calculated by referring to the user attitude information in the signature authentication procedure and the user attitude information in the signature registration procedure (S524). Success of the authentication by the signature is determined using the matching and the authentication success threshold calculated in the above (S526).

6 is a diagram for explaining an operation between a device and a wearable device related to another embodiment of the present invention.

Referring to FIG. 6, a wearable device (wearable device) 1100 and a signature registration device (or a signature authentication device) 1000 can be interconnected wirelessly. The wearable device 1100 can be any type of textile / garment including an accessory type including a watch, a pair of glasses, a ring, a bracelet, a necklace or a hand-held bar type, Or a body attachment type including a skin patch sensor attachable to the body, or a living body implantable type including a living body implantable sensor implantable in a human body (living body).

The wearable device 1100 can transmit the sensing information detected through the sensor to the device (signature registration device or signature authentication device 1000) at the request of the device (signature registration device or signature authentication device 1000) or at periodic intervals have.

In the embodiment of the present invention, the wearable device 1100 may be attached (or worn) to one of contact and non-contact with a user, and may be a sensor (e.g., a tilt sensor, a motion sensor, A gyro sensor, a temperature sensor, and the like), and a communication unit capable of transmitting the status of the user.

The user wears the wearable device 1100 on his wrist or head and inputs a signature to the device 1000 using an input tool such as a finger or a stylus pen 1001 including an index finger.

7 is a block diagram illustrating an apparatus and a wearable apparatus according to another embodiment of the present invention.

Referring to FIG. 7, an apparatus 1000 includes an input unit 1010, a controller 1020, a sensing unit 1030, a storage unit 1040, and a communication unit 1050. The control unit 1020 may control the input unit 1010, the sensing unit 1030, the storage unit 1040, and the communication unit 1050.

The control unit 1020 controls the signal flow between the overall operation of the apparatus 1000 and the internal components 1010 to 1050 of the apparatus 1000 and performs the function of processing the data. The controller 1020 can execute an OS (Operation System) and various applications stored in the storage unit 1040 when the input of the user is satisfied or the preset stored condition is satisfied.

Elements 1010 to 1040 except for the communication unit 1050 are substantially the same as those of the embodiment of the present invention (FIGS. 1A and 1B), so duplicate descriptions are omitted.

The communication unit 1050 can connect the device 1000 to the wearable device 1100 under the control of the control unit 1020. The control unit 1020 can receive status information of the user from the wearable device 1100 connected through the communication unit 1050. [ In addition, the communication unit 1050 can be connected to an external server (not shown) under the control of the controller 1020 to download an application or transmit / receive data for web browsing. The communication unit 1050 may include one of a wireless LAN (not shown) and a local communication unit (not shown) corresponding to the performance and structure of the apparatus 1000. In addition, the communication unit 1050 may include a combination of a wireless LAN (not shown) and a local communication unit (not shown) corresponding to the performance and structure of the apparatus 1000.

The wireless LAN (not shown) may be connected to an access point (AP) using wireless in a place where an access point (AP) (not shown) is installed, under the control of the controller 1020. The wireless LAN (not shown) supports the IEEE 802.11x standard of the Institute of Electrical and Electronics Engineers (IEEE). The short-range communication unit (not shown) may be a wireless communication unit such as a Bluetooth, a bluetooth low energy, an IrDA, a Wi-Fi, an Ultra Wideband (UWB) ), And the like.

The components (e.g., 1010 to 1050) illustrated in the apparatus 1000 of FIG. 7 may be added or deleted in response to the capabilities of the apparatus 1000. It will also be readily understood by those skilled in the art that the location of the components (e.g., 1010-1050) may be varied corresponding to the performance or structure of the device 1000. [

The wearable apparatus 1100 includes a control unit 1110, a communication unit 1130, a camera unit 1140, a sensing unit 1150, a display unit 1170, a speaker 1175, a storage unit 1180, and / 1190). For example, the wearable device 1100 includes a control unit 1110, a communication unit 1130, a sensing unit 1150, a storage unit 1180, and a power supply unit 1190. The wearable apparatus 1100 may include a control unit 1110, a communication unit 1130, a camera unit 1140, a sensing unit 1150, a storage unit 1180, and a power supply unit 1190. The wearable device 1100 may include a control unit 1110, a communication unit 1130, a camera unit 1140, a sensing unit 1150, a display unit 1170, a storage unit 1180, and / have. The wearable device 1100 includes a control unit 1110, a communication unit 1130, a camera unit 1140, a sensing unit 1150, a display unit 1170, a speaker 1175, a storage unit 1180, ).

The control unit 1110 stores a signal or data input from the outside of the ROM 1112 and the wearable device 1100 in which a control program for controlling the processor 1111 and the wearable device 1100 is stored, (RAM) 1113, which is used as a storage area corresponding to various operations performed in the apparatus 1100. The control unit 1110 may also include a processor 1111 and a flash memory (not shown). It will be readily understood by those skilled in the art that the configuration of the control unit 1110 can be variously implemented according to the embodiment of the present invention.

The control unit 1110 controls the overall operation of the wearable device 1100 and the signal flow between the internal components 120 to 190 of the wearable device 1100 and performs processing of data. The controller 1110 controls the power supplied from the power supply 1190 to the internal components 1130 to 1180. In addition, when the user inputs or pre-stored conditions are satisfied, the control unit 1110 can execute an OS (Operating System) and various applications stored in the storage unit 1180. [

The processor 1111 may include a graphic processor (not shown) for graphic processing of an image or an image. The processor 1111 may be implemented as a system on chip (SoC) including a core (not shown) and a GPU (not shown). The processor 1111 may include a single core, a dual core, a triple core, a quad core, and cores thereof.

The processor 1111 may be implemented with a plurality of processors including a main processor (not shown) and a sub processor (not shown). A sub processor means a processor operating in a sleep mode. In addition, the processor 1111, the ROM 1112, and the RAM 1113 may be interconnected via an internal bus.

In an embodiment of the present invention, the control unit 1110 of the wearable apparatus can be used in terms of components including the processor 1111, the ROM 1112, and the RAM 1113. [

It will be readily understood by those skilled in the art that the operation of the control unit 1110 can be variously implemented according to the embodiment of the present invention.

The communication unit 1130 may wirelessly connect the wearable device 1100 to the device 1000 under the control of the control unit 1110. [ The control unit 1110 can download an application or browse the web from an external device (for example, a server or the like) connected through the communication unit 1130. [ The communication unit 1130 may include one of a wireless LAN (not shown) and a local communication unit (not shown) corresponding to the performance and structure of the wearable device 1100. In addition, the communication unit 1130 may include a combination of a wireless LAN (not shown) and a local communication unit (not shown).

The wireless LAN (not shown) may be connected to an access point (AP) using a wireless network in a place where an access point (AP) (not shown) is installed, under the control of the controller 1110. The short-range communication unit (not shown) may be a wireless communication unit such as a Bluetooth, a bluetooth low energy, an IrDA, a Wi-Fi, an Ultra Wideband (UWB) Field Communication) and the like.

The communication unit 1130 can transmit status information of the user corresponding to the sensing information sensed through the sensing unit 1150 to the device 1000 in the form of data in accordance with the control of the control unit 1110. [

The camera unit 1140 captures a still image or a moving image in a direction desired by the user under the control of the control unit 1110. [ In addition, the camera unit 1140 can take a still image or a moving image corresponding to a user's desired direction under the control of the control unit 1110. [ The camera unit 1140 may convert the received image under the control of the controller 1110 and output the converted image to the controller 1110.

The camera unit 1140 may be composed of a lens (not shown) and an image sensor (not shown). The camera unit 1140 may support optical zoom (e.g., 5x optical zoom) or digital zoom (e.g., 10x digital zoom) using a plurality of lenses and image processing . The recognition range of the camera unit 1140 can be variously set according to the angle between the camera and the user and the surrounding environment conditions.

When the camera unit 1140 includes a plurality of cameras, the first camera (not shown) at the upper end of the bezel may be adjacent (e.g., greater than 2 cm, less than 8 cm) Dimensional still image or three-dimensional motion using a second camera (not shown).

The camera unit 1140 may be integrated with the wearable device 1100 or may be implemented separately. An apparatus (not shown) including the separated camera unit 1140 may be connected to the wearable apparatus 1100 via a communication unit 1130 or an input / output unit (not shown).

The control unit 1110 controls the operation of the wearable device 1100 by using the still image or the moving image received from the camera unit 1140 so that the user wears the wearable device 1100 (e.g., worn on the wrist) Worn on the head). Also, the control unit 1110 can transmit the received still image or moving image to the outside using the communication unit 1130. [

The sensing unit 1150 can sense the status of the user while the signature is input (e.g., signature registration or signature authentication) under the control of the controller 1110. [ The state of the user is a condition or a situation that affects the signature input of the user who inputs the signature. For example, the state of the user may include a degree of hand trembling of the user who wears the wearable device 1100, Location of the user, operational state of the user, or blood alcohol concentration of the user.

The sensing unit 1150 may sense not only the state of the user but also state information (e.g., a fixed state or a holding state) of the apparatus 1000 receiving the signature. For example, in the case of the wearable device 1100 worn on the wearer's wrist, the control unit 1110 uses the sensing information sensed by the sensing unit 1150 to determine the state of the user and the state of the device 1000 (Similar to sensing in the sensing unit 130).

The sensing unit 1150 may include a proximity sensor, an acceleration sensor, a gyro sensor, a terrestrial magnetism sensor, a blood alcohol sensor, a current skin resistance sensor a skin response sensor (GSR) and / or a pressure sensor. For example, the controller 1110 can detect a user's hand tremor or a user tremor using an acceleration sensor, a gyro sensor, and / or a geomagnetic sensor. The control unit 1110 can detect a user's blood alcohol concentration using a blood alcohol concentration sensor (or a proximity sensor). For example, the blood alcohol concentration sensor may be a bar type that is electrically connected to the device 1100. The controller 1110 may sense an operation (e.g., movement, stop, running, etc.) and / or a state of the user using an acceleration sensor, a gyro sensor, and / or a geomagnetic sensor. The controller 1110 can detect the state (e.g., tilt, direction, etc.) of the wearable device 1100 using an acceleration sensor, a gyro sensor, and / or a geomagnetic sensor. The controller 1110 may sense the position of the user's hand using an acceleration sensor and / or a gyro sensor. Also, the controller 1110 may detect the user's exercise intensity, sleeping status, movement, or walking by using an acceleration sensor, a current skin resistance sensor, and / or a pressure sensor. The control unit 1110 can detect the status of the user using various combinations of sensors included in the sensing unit 1150.

The sensing unit 1150 may be integrated with the wearable device 1100 or may be separate type. The detachable sensing unit 1150 may be connected to the wearable device 1100 by wire or wirelessly and may transmit an electric signal corresponding to the detected user status requested from the wearable device 1100 to the wearable device 1100.

The display unit 1170 may display the content (for example, video, image, text, or web page) received through the communication unit 1130 under the control of the control unit 1110. Also, the display unit 1170 may output the content stored in the storage unit 1180 under the control of the control unit 1110. The display unit 1170 may display the state of the wearable device 1100 sensed according to the control of the controller 1110 as a symbol including animation, image, text, and / or emoticon.

The display unit 1170 may be implemented as a touch screen (not shown) including a touch panel (not shown) that receives a user's input (e.g., a single touch or a multi-touch).

The speaker 1175 can output audio included in the audio (e.g., voice, sound) or video received through the communication unit 1130 under the control of the control unit 1110. [ Also, the speaker 1175 can output the audio stored in the storage unit 1180 under the control of the control unit 1110.

The storage unit 1180 stores a control program for controlling the internal components of the wearable device 1100 and the control unit 1110, a graphical user interface (GUI) associated with an application or an application first downloaded from an external source or downloaded from a manufacturer, (E.g., images, text, icons, buttons, etc.), user information, documents, databases or related data to provide.

The storage unit 1180 may store an OS (Operating System) for driving and controlling the wearable device 1100, various data, programs, or applications. In the embodiment of the present invention, the term storage unit refers to a storage unit 1180, a ROM 1112, a RAM 1113, or a memory card (e.g., micro SD card, USB memory, Lt; / RTI > In addition, the storage unit 1180 may include a nonvolatile memory, a volatile memory, a hard disk drive (HDD), or a solid state drive (SSD).

The storage unit 1180 may include a communication module, a camera module, a sensing module, a display module, a touch panel module, an audio output module, a storage module, a power module, or a related database (DB). The modules and the data base of the storage unit 1180 are connected to the wearable device 1100 through a communication control function, a camera control function, a display control function, a touch panel control function, an audio output control function, a storage control function, , Or related database (DB) control functions. The control unit 1110 can control the wearable device 1100 using respective modules and software stored in the storage unit 1180. [

The power supply unit 1190 supplies power from the external power source to the components 1130 to 1180 in the wearable device 1100 under the control of the control unit 1110. The power supply unit 1190 may supply power to one or more batteries (not shown) located in the wearable apparatus 1100 under the control of the controller 1110. [ The powered battery may be located between the display portion 1170 and an integral or detachable rear cover (not shown).

The components (e.g., 1110 to 1180) shown in the wearable device 1100 of FIGS. 6 and 7 may be added or deleted in response to the capabilities of the wearable device 1100. It will be readily understood by those skilled in the art that the position of the components (e.g., 1110 to 1180) can be changed corresponding to the performance or structure of the wearable device 1100.

8 is a flowchart for explaining a device signature registration and authentication method according to another embodiment of the present invention.

10 to 14 are diagrams for explaining an example of a device signature registration and authentication method according to another embodiment of the present invention.

In step S1201 of Fig. 8, the signature of the user is input.

Referring to FIG. 10, a signature of a user is input through an input unit 1010 of the apparatus 1000. A wearer wearing the wearable device 1100 on the wrist and holding the device 1000 inputs a signature using a finger including an index finger or an input tool such as a stylus pen 1001. [ Alternatively, the wearable device 1100 is worn on the head, and the user holding the device 1000 inputs a signature using an input tool such as a finger or a stylus pen 1001 including an index finger. In order to improve the accuracy of the signature registration, the user can input the signature multiple times.

The signature of the user may be entered via the configuration of the device 1000 or through an application executed for registration of the signature.

The storage unit 1040 of the device 1000 may store the received user signature under the control of the control unit 1010. [ The storage unit 1040 of the apparatus 1000 may also store the characteristics of the user signature received under the control of the control unit 1010 (e.g., the shape of the signature, the speed of the signature input, and / Lt; / RTI >

Referring to FIG. 11, a screen or a web page (not shown) of the application 1410 executed in the apparatus 1000 may be displayed. The application 1410 may be a shopping application and may be downloaded from outside. The screen of the displayed application 1410 may be a purchase order form of a product (for example, a sound bar) to be purchased.

When the signature input field 1411 is touched by the input pen 1001 on the screen of the application 1410, the control unit 1010 can display a pop-up 1412 for inputting a signature. The displayed pop-up 1412 may have a larger area than the signature input field 1411. [

The user can input the authentication signature using the input pen 1001 in the enlarged pop-up 1412. [ When the input of the authentication signature is completed, the pop-up 1412 disappears, and the input authentication signature can be displayed in the signature input field 1411. [

Referring to FIG. 6, the user may touch the screen of the apparatus 1000 with the input pen 1001 to release the screen lock state of the apparatus 1000. The controller 1010 may display a pop-up corresponding to the touch of the input pen 1001. [ The user can input the signature using the input pen 1001 to unlock the screen of the apparatus 1000. [

In step S1202 of Fig. 8, the device requests sensing information from the wearable device.

The control unit 1010 of the apparatus 1000 can search the wearable apparatus capable of detecting the user status through the communication unit 1050 with a known wireless network (for example, Bluetooth, wireless LAN, short distance communication, or the like). The control unit 1010 of the apparatus 1000 may be connected to a known wireless network (for example, Bluetooth, wireless LAN, or short-range communication) using a wearable device capable of detecting a user status through a communication unit 1050, As shown in FIG.

When the signature of the user is input, the control unit 1010 can search for the wearable device 1100. The control unit 1010 can search for the wearable device 1100 when one of the signature input field 1411 and the signature input popup 1412 is displayed on the screen of the apparatus 1000. [ In addition, when the input of the user signature is completed, the control unit 1010 can search for the wearable device 1100. [

The control unit 1010 can wirelessly connect with the searched wearable device (e.g., a wearable wearable device). The control unit 1010 of the device 1000 requests the wirelessly connected wearable device 1100 for sensing information corresponding to the status of the user.

The control unit 1110 of the wearable device 1100 may sense the user status using the sensing unit 1150 in response to the request of the device 1000. [ The control unit 1110 of the wearable device 1100 may use an application (not shown), a software program, or a program included in the OS that detects the user status in response to a request of the device 1000 and the detection unit 1150 It is possible to detect the state of the user. The control unit 1110 of the wearable device 1100 can sense the status of the user using the sensing unit 1150 in an application (not shown) corresponding to the request of the device 1000. [

For example, in the hand tremble state, which is one of the states of various users, the low hand tremble state indicates the range of the acceleration sensed from the sensing unit 1150 as -1.5 = x axis = 1.5 ?, -1.5 = y axis = 1.5? -1.5 = z axis = 1.5 ㎨). The range of the sensed acceleration may be determined by the vector sum of the X-axis, the Y-axis, and the Z-axis. Also, the high hand tremble state can be set within a range of the acceleration sensed from the sensing unit 1150 within the range of -12.5 = x-axis = 12.5 mm, -12.5 = y-axis = 12.5 mm, -12.5 = z-axis = 12.5 mm . The range of the sensed acceleration may be determined by the vector sum of the X-axis, the Y-axis, and the Z-axis.

The hand shake state according to the embodiment of the present invention is one embodiment and that the range or size of each sensor detection value sensed by various sensors of the sensing unit 1150 according to various user states can be changed, And will readily be understood by those of ordinary skill in the art.

The control unit 1110 of the wearable device 1100 may use an application (not shown), a software program, or a program included in the OS that detects the user state in advance before requesting the device 1000 and a detection unit 1150 To detect the status of the user periodically (for example, 1 min, changeable).

The sensing unit 1150 may generate an electric signal corresponding to the state of the wearer wearing the wearable device 1100 and may transmit the generated electric signal to the control unit 1110. For example, the acceleration sensor can transmit an electric signal corresponding to the sensing of the velocity change per unit time to the control unit 1110 with respect to the X-axis, Y-axis, and Z-axis directions of the wearable device 1100. The gyro sensor may transmit an electric signal corresponding to the detection of the rotation angle of the wearable device 1100 per unit time to the controller 1110. The geomagnetic sensor may transmit an electric signal corresponding to detection (e.g., azimuth) of the peripheral geomagnetism of the wearable device 1100 to the control unit 1110. [ The blood alcohol concentration sensor may transmit an electrical signal corresponding to the detection of the alcohol concentration included in the exhalation of the user to the controller 1110. [ The current skin resistance sensor GSR may transmit an electrical signal corresponding to the detection of the electrical conductivity of the user's skin (for example, the activation degree of the sympathetic nerve) to the control unit 1110. The pressure sensor may transmit an electrical signal corresponding to the detection of the input signature pressure to the controller 1110. The proximity sensor may transmit an electrical signal corresponding to the detection of the user's access to the wearable device 1100 to the control unit 1110. [

The control unit 1110 can determine the state of the user (e.g., degree of hand tremor, degree of user shake, degree of user's motion, blood alcohol concentration, etc.) using the electric signal received at the sensing unit 1150. [ The control unit 1110 may respond to an electrical signal received by the sensing unit 1150 and a user state reference stored in the storage unit 1110 such as an electrical signal sensed by an acceleration sensor, a gyro sensor, and / User state criteria, not shown) to determine the user state. It will be readily understood by those skilled in the art that the user condition criteria can be changed according to the type and function of the sensor included in the wearable device 1100. [

The control unit 1110 may store the electrical signal received from the sensing unit 1150 in the storage unit 1180. The control unit 1110 may store the electrical signals received from one or a plurality of sensors in the storage unit 1180. In addition, the controller 1110 may store the user state information corresponding to the user state in the storage unit 1180. For example, the user state information may include at least one of a sensed sensor name, a sensed sensor identifier (ID), a sensed time, a sensor sensed value (e.g., voltage, current, etc.), a user condition (e.g., hand tremble, Jogging, etc.)).

In one embodiment of the present invention, the sensing information may comprise user state information or an electrical signal received from the sensor.

The controller 1110 of the wearable device 1100 may transmit the sensing information corresponding to the request of the device 1000 to the device 1000 using the communication unit 1130. [ The control unit 1110 of the wearable device 1100 transmits the sensing information corresponding to the request of the device 1000 in real time or delayed by using the communication unit 1130 ).

In step S1203 of Fig. 8, the device receives sensing information from the wearable device.

The control unit 1010 of the apparatus 1000 can receive the sensing information corresponding to the request of the apparatus 1000 from the wearable apparatus 1100 using the communication unit 1050. [ The sensing information may include one of user state information and an electrical signal. The control unit 1010 may temporarily store the received sensing information in the storage unit 1080. The received sensing information may include at least one of a sensing sensor name, a sensing sensor identifier (ID), a sensing time, a sensor sensing value (e.g., voltage, current, etc.), a user condition (e.g., hand tremble, Lt; / RTI >

In step S1204 of Fig. 8, the device determines the user status.

The controller 1010 of the apparatus 1000 may determine (e.g., walk) the state of the user using the user state information included in the received sensing information. Alternatively, the control unit 1010 of the apparatus 1000 may determine (e.g., walk) the state of the user using the electrical signals included in the received sensing information. In addition, the control unit 1010 of the apparatus 1000 may determine whether to register the signature information using the inputted user signature information (for example, the shape of the signature, the speed of the signature input, or the signature pressure to be sensed).

In step S1205 of Fig. 8, the device determines whether or not to perform a signature registration procedure.

The control unit 1010 of the apparatus 1000 may determine whether to store the storage unit 1040 using the inputted user signature information. For example, if the same user signature information is not stored in the storage unit 1040 (for example, when the user signatures are initially registered), the control unit 1010 of the apparatus 1000 may determine registration of user signature information . In addition, if one of the signature registration procedure and the signature authentication procedure is selected by the user, the control unit 1010 of the apparatus 1000 can perform the selected procedure. If the signature registration procedure is selected by the user, the control unit 1010 of the apparatus 1000 may perform the signature registration procedure. In this case, the flow advances to step S1206 of FIG.

If the same user signature information is stored in the storage unit 1040, the control unit 1010 of the apparatus 1000 can determine authentication of the user signature information. Also, when the signature authentication procedure is selected by the user, the control unit 1010 of the apparatus 1000 may perform the signature authentication procedure. In this case, the flow advances to step S1207 of FIG.

The control unit 1010 of the apparatus 1000 determines whether the signature registration process is currently performed or not, and proceeds to step S1206 of FIG. 8 when the signature registration process is performed. , The process may proceed to step S1207 of FIG.

In step S1206 of Fig. 8, the device stores the signature information and the user status information.

The control unit 1010 of the apparatus 1000 may store the received user signature information and user status information in the storage unit 1040 according to the signature registration procedure. In addition, the control unit 1010 of the apparatus 1000 may store the user signature information and the user state information temporarily stored in the storage unit 1040, received from the wearable device 1100 according to the signature registration procedure.

When the user signature information and the user status information are stored in the storage unit 1040, the signature registration method of the apparatus is terminated.

Returning to step S1205 of FIG. 8, if there is the same user signature information in the storage unit 1040, the process proceeds to step S1207 of FIG. 8 which performs the signature authentication procedure.

In step S1207 of FIG. 8, the apparatus determines whether or not to authenticate the signature using the stored signature information, user state information, input signature information, and received user state information.

The control unit 1010 of the apparatus 1000 can authenticate the input user signature using the signature information stored in the storage unit 1040, the user status information, the inputted signature information, and the received user status information. The control unit 1010 calculates the matching degree using the previously registered signature information and the inputted signature information. The controller 1010 may determine whether the user signature is authenticated by comparing the calculated matching result with an authentication success threshold value. The computation of the degree of matching and whether the signature is authenticated can use stored signature information, user state information, input signature information, and received user state information.

The controller 1010 of the apparatus 1000 may change the weight for each feature corresponding to the calculation of matching using the registered (pre-stored) user state information and the inputted user state information. In addition, the control unit 1010 of the apparatus 1000 may change the authentication success threshold value using the registered (pre-stored) user state information and the inputted user state information.

(For example, low hand trembling) in the case of signature registration and the user state (for example, low hand trembling in case of sign authenticating) are the same (when the registration user signature and the authentication accuracy of the authentication user signature are high ), The control unit 1010 of the apparatus 1000 can perform the signature authentication procedure without changing the characteristic weighting value and the authentication success threshold value.

In response to the comparison result of the user state in the case of signature registration and the comparison result of the user state in case of signature authentication, the control unit 1010 sets a characteristic (for example, a signature shape, a signature The input speed or the pressure of the signature being entered). Each signature feature has a weight corresponding to the importance in the matching degree calculation. For example, when calculating the matching degree, the controller 1010 can calculate the matching degree by setting the weight of the signature shape to 30, the weight of the signature speed to 30, and the weight of the signature pressure to be input to 40. [ The sum of the weights applied to the calculation of the matching degree may be 100. In addition, even when the weights of the features are changed by the controller 1010, the sum of the weights may be equal to 100. [

Consider a case in which a user registers a signature via the device 1000 in a low hand trembling state and a case where the authentication signature is input via the device 1000 in a high hand trembling state. When the control unit 1010 applies the reference weights (for example, 30, 30, 40), the True Accept Rate (TAR) may be lowered due to the difference between the characteristics of the registration signature and the characteristics of the authentication signature . The control unit 1010 can improve the identity authentication success rate (TAR) by changing the reference weights (e.g., 30, 30, and 40) of signature features to 40, 35, and 25, respectively.

The weight of each signature feature according to the embodiment of the present invention is one embodiment and is a weight of each signature feature corresponding to the state of the user (e.g., hand tremble, user shake, user's action, walking or jogging, etc.) It will be readily understood by those skilled in the art.

The control unit 1010 changes the authentication success threshold value for authentication of the input signature so as to increase the authentication rate of the user in response to the comparison result between the user status in the case of signature registration and the user status in case of signature authentication . The authentication success threshold value is a reference value for judging authentication success considering the similarity between the registered signature and the signature inputted for authentication.

For example, if the established authentication success threshold is 85, and the signature state is a user state that is low hand trembling and a low hand trembling state when signature authentication is performed (e.g., low hand trembling) The self-certification success rate (TAR) may be 96%.

In case of registering a signature, the user's authentication success rate may be lowered due to the difference in the accuracy of the user signature inputted in the user state, which is low hand trembling, and the user state, which is high hand trembling when signing authentication. In addition, in the case of registering a signature, the user's authentication success rate may be lowered due to the difference in accuracy of the user signature inputted in the user state, which is high hand trembling and the user state, which is low hand trembling when signing authentication.

If the user state in the case of signature registration and the user state in case of signature authentication are different, the control unit 1010 can improve the authentication success rate by changing (e.g., reducing) the authentication success threshold value. For example, when the user state in the case of signature registration is different from the user state in case of signature authentication, the control unit 1010 can change the authentication success threshold value from 85 to 70. [ Further, when the user state in the case of signature registration and the user state in case of signature authentication are different, the control section 1010 may change the authentication success threshold value from 90 to 75. [

In the case of registering a signature, the user's authentication success rate may be lowered due to a difference in the accuracy of the user signature inputted in the user state, which is high hand movement, and the user state, which is high hand movement when signing authentication. If all of the user states in signature registration and signature authentication are in a high hand trembling state, the control unit 1010 can improve the authentication success rate by changing (e.g., reducing) the authentication success threshold value. For example, when both the signature registration and the signature authentication are in the high hand trembling state, the control unit 1010 may change the authentication success threshold from 80 to 70. [

The authentication success threshold according to the embodiment of the present invention is one embodiment, and the fact that the authentication success threshold can be changed in response to the user's state (e.g., hand trembling, walking, jumping, jogging, etc.) And will be readily understood by those of ordinary skill in the art.

In step S1208 of Fig. 8, the device determines whether to authenticate the signature.

The control unit 1010 of the apparatus 1000 may determine whether to authenticate the signature corresponding to the result of comparison between the stored signature information, the user state information, the inputted signature information, and the received user state information.

12 and 11, the control unit 1010 of the apparatus 1000 may display a pop-up according to signature verification. If the input signature is authenticated, the control unit 1010 displays a pop-up 1413 corresponding to the authentication success. Alternatively, if the entered signature is authenticated, the control unit 1010 may display a pop-up 1413 including authentication success and a comment. When the pop-up 1413 is selected or closed by the user, the flow advances to step S1209 in Fig.

If the input signature fails authentication, the control unit 1010 displays a pop-up 1414 corresponding to the authentication failure. Alternatively, if the entered signature fails to authenticate, the control unit 1010 may display a pop-up 1414 including an authentication failure as well as a retry 1414a and a cancel 1414b, cancel. If the popup 1414 is selected or closed by the user, the signature verification method of the device is terminated.

In step S1209 of Fig. 8, the apparatus performs a function.

The control unit 1010 of the apparatus 1000 may perform a function corresponding to the signature authentication. For example, if the signature is authenticated, the control unit 1010 can purchase the merchandise through the shopping application 1410. In addition, the control unit 1010 can release the screen lock of the device 1000 by authentication signature.

When performing the corresponding function in the apparatus 1000, the signature authentication method of the apparatus is ended.

9 is a flowchart for explaining a device signature registration and authentication method according to another embodiment of the present invention.

In step S1301 of Fig. 9, the signature of the user is input.

Referring to FIG. 10, a signature of a user is input through an input unit 1010 of the apparatus 1000. The user wears the wearable device 1100 on his or her wrist or wears it on his head and the user holding the device 1000 inputs the signature using the input pen 1001 such as a finger or a stylus pen including an index finger.

The input of the user signature in step S1301 of FIG. 9 is substantially similar to the input of the user signature in step S1201 of FIG. 8, so that redundant description is omitted.

In step S1302 of Fig. 9, the device status information is received.

When the signature of the user is inputted, the control unit 1010 of the apparatus 1000 can sense the direction and / or the movement of the apparatus using the sensing unit 1030. The direction and / or motion of the sensed device may be transmitted to the controller 1010.

The reception of the state information of the apparatus 1000 in step S1302 of Fig. 9 is performed by the state of the apparatus 1000 in step S220 of Fig. 2, step S420 of Fig. 4, or step S514 of Fig. Information is substantially similar to the reception of the information, so redundant explanations are omitted.

In step S1303 of Fig. 9, the device requests sensing information from the wearable device.

The control unit 1010 of the apparatus 1000 can search the wearable apparatus capable of detecting the user status through the communication unit 1050 with a known wireless network (for example, Bluetooth, wireless LAN, short distance communication, or the like). The control unit 1010 can wirelessly connect with the searched wearable device (e.g., a wearable wearable device). The control unit 1010 of the device 1000 requests the wirelessly connected wearable device 1100 for sensing information corresponding to the status of the user.

The control unit 1110 of the wearable device 1100 may sense the user status using the sensing unit 1150 in response to the request of the device 1000. [

The request for the sensing information and the sensing of the user information to the wearable device in step S1303 in Fig. 9 are substantially similar to the request for sensing information and the detection of the user status to the wearable device in step S1202 in Fig. 8, Is omitted.

In step S1304 of Fig. 9, the device receives sensing information from the wearable device.

The control unit 1010 of the apparatus 1000 can receive the sensing information corresponding to the request of the apparatus 1000 from the wearable apparatus 1100 using the communication unit 1050. [

The reception of the sensing information from the wearable device in step S1304 in Fig. 9 is substantially similar to the reception of the sensing information from the wearable device in step S1203 in Fig. 8, and thus redundant description is omitted.

In step S1305 of Fig. 9, the device determines the device status and the user status.

The control unit 1010 of the apparatus 1000 may determine the state of the apparatus 1000 (e.g., a fixed state or a grip state) using the sensor value received by the sensing unit 1030. [ The control unit 1010 of the apparatus 1000 may determine the status of the user (for example, a walk) using the received sensing information.

Since the determination of the device state in step S1305 of Fig. 9 is substantially similar to the determination of the user state in step S220 of Fig. 2 or step S420 of Fig. 4, redundant description is omitted. The determination of the user state in step S1305 of Fig. 9 is substantially similar to the determination of the user state in step S1204 in Fig. 8, so redundant explanations are omitted.

In step S1306 of FIG. 9, the apparatus determines whether or not to perform a signature registration procedure.

The control unit 1010 of the apparatus 1000 may determine whether to store the storage unit 1040 using the inputted user signature information.

The determination as to whether or not to perform the signature registration procedure in step S1306 of FIG. 9 is substantially similar to the determination of whether or not the signature registration procedure is performed in step S1205 of FIG. 8, so redundant explanations are omitted.

In step S1207 of Fig. 9, the device stores signature information, device status information, and user status information.

The control unit 1010 of the device 1000 may store the received user signature information, device status information, and user status information in the storage unit 1040 according to a signature registration procedure. The control unit 1010 of the apparatus 1000 may store the user signature information, the device status information, and the user status information temporarily stored in the wearable device 1100 in the storage unit 1040 according to the signature registration procedure.

When the user signature information, the device status information, and the user status information are stored in the storage unit 1040, the signature registration method of the device ends.

Returning to step S1306 of FIG. 9, if there is the same user signature information in the storage unit 1040, the process proceeds to step S1308 of FIG. 9 in which the signature authentication procedure is performed.

In step S1308 of FIG. 9, the device determines whether or not the signature is authenticated using the stored signature information, the device status information, the user status information, the entered signature information, the device status information, and the received user status information.

The control unit 1010 of the device 1000 receives the user information input by using the signature information stored in the storage unit 1040, the status information of the device, the user status information, the inputted signature information, the status information of the device, The signature can be authenticated. The control unit 1010 calculates the matching degree using the previously registered signature information and the inputted signature information. The controller 1010 can determine whether the user signature is authenticated by comparing the calculated matching result with an authentication success threshold value. The computation of the degree of registration and whether the signature is authenticated can use stored signature information, device status information, user status information, input signature information, device status information, and received user status information.

The control unit 1010 of the apparatus 1000 can change the weight for each feature corresponding to the registration degree calculation by using the state information of the registered (pre-stored) apparatus, the user state information, the state information of the input apparatus and the user state information have. In addition, the control unit 1010 of the apparatus 1000 may change the authentication success threshold value using the status information of the registered (pre-stored) apparatus, the user status information, the status information of the input apparatus, and the user status information.

(For example, a fixed state) and a user state (for example, a low hand movement) in the case of signature registration, (For example, low hand trembling) are the same (when the registration user signature and the authentication accuracy of the authentication user signature are high), the control unit 1010 of the apparatus 1000 can perform signature weight change and authentication success threshold An authentication procedure can be performed.

In response to the comparison result of the user state in the case of signature registration and the comparison result of the user state in case of signature authentication, the control unit 1010 sets a characteristic (for example, a signature shape, a signature The input speed or the pressure of the signature being entered). Each signature feature has a weight corresponding to the importance in the matching degree calculation. For example, when calculating the matching degree, the controller 1010 can calculate the matching degree by setting the weight of the signature shape to 30, the weight of the signature speed to 30, and the weight of the signature pressure to be input to 40. [ The sum of the weights applied to the calculation of the matching degree may be 100. In addition, when the weights of the features are changed by the controller 1010, the sum of the weights may be equal to 100. [

Consider a case where a user registers a signature with the device 1000 in a fixed state and a low hand trembling state, and a case where an authentication signature is input through the device 1000 in a fixed state and a high hand trembling state. When the control unit 1010 is fixed and the reference weightings (for example, 30, 30, 40) are applied to the device 1000 having the hand tremor difference, The True Accept Rate (TAR) may be degraded. The control unit 1010 can improve the identity authentication success rate (TAR) by changing the reference weights (e.g., 30, 30, and 40) of signature features to 40, 35, and 25, respectively.

The weight of each signature feature according to an embodiment of the present invention is one example and may be determined based on the state of the device (e.g., fixed state, grip state) and the state of the user (e.g., hand tremor, It will be readily understood by those of ordinary skill in the art that the weight of each signature feature can be changed in response to a user's signature.

The control unit 1010 changes the authentication success threshold value for authentication of the input signature in accordance with the device status in the case of signature registration and the comparison result between the user status and the device status and the user status in case of sign authentication, . The authentication success threshold value is a reference value for judging authentication success considering the similarity between the registered signature and the signature inputted for authentication.

For example, if the established authentication success threshold is 85, the device 1000 in a fixed state in case of sign registration and the device 1000 in a fixed state in case of signature authentication with a low hand trembling user state, In the case of a user state (e.g., low hand trembling), the user's authentication success rate (TAR) may be 94%.

By the difference in accuracy of the inputted user signature in the fixed state device 1000 in the case of signature registration and the user state in the case of low hand shake and the fixed state device 1000 in case of sign authenticating and the high hand shake user state The user's authentication success rate may be lowered. In addition, in the case of registering a signature, the user's authentication success rate may be lowered due to the difference in accuracy of the user signature inputted in the user state, which is high hand trembling and the user state, which is low hand trembling when signing authentication.

In the case where the device 1000 is in a fixed state in the case of signature registration and the user state is different from the user state in the case where the user state and the device 1000 in a fixed state in sign authentication are different from each other, the control unit 1010 changes the authentication success threshold value , The authentication success rate can be improved. For example, when the device 1000 is in a fixed state in the case of sign registration and the user state is different from the user state and the device 1000 in a fixed state in sign authentication, the control unit 1010 sets the authentication success threshold value to 85 To 65. < / RTI > If the user state in the signature registration and the user state in the sign authentication are different from each other, the control unit 1010 may change the authentication success threshold value from 93 to 74. [

By the difference in accuracy of the entered user's signature in the fixed state device 1000 in the case of signature registration and in the user state in the high hand tremor state and in the fixed state device 1000 in case of sign authenticating and in the high hand trembling user state The user's authentication success rate may be lowered. When both the device 1000 in a fixed state in sign registration and signature authentication and the user state are in a high hand trembling state, the control unit 1010 changes (for example, decreases) the authentication success threshold value Can be improved. For example, when both the signature registration and the signature authentication are in a high hand trembling state, the control unit 1010 can change the authentication success threshold from 82 to 71. [

The authentication success threshold according to an embodiment of the present invention is one embodiment and is an example of an authentication success threshold value in response to the status of the device 1000 and the status of the user (e.g., hand trembling, walking, It will be readily understood by those of ordinary skill in the art. For example, when registering a signature, a combination of the device state and the user state of each of the fixed device 1000 and the user state (e.g., hand trembling, walking, jogging, The number of states X the number of user states), the authentication success threshold may be changed.

In step S1309 of Fig. 9, the device determines whether or not the signature is authenticated.

The control unit 1010 of the device 1000 can determine whether to authenticate the signature in accordance with the comparison result between the stored signature information, the device status information, the user status information, the inputted signature information, the device status information, and the received user status information have.

12 and 11, the control unit 1010 of the apparatus 1000 may display a pop-up according to signature verification. If the input signature is authenticated, the control unit 1010 displays a pop-up 1413 corresponding to the authentication success. Alternatively, if the entered signature is authenticated, the control unit 1010 may display a pop-up 1413 including authentication success and a comment. If the popup 1413 is selected by the user, the flow advances to step S1310 of FIG.

If the input signature fails authentication, the control unit 1010 displays a pop-up 1414 corresponding to the authentication failure. Alternatively, if the entered signature fails to authenticate, the control unit 1010 may display a pop-up 1414 including an authentication failure as well as a retry 1414a and a revocation 1414b. If the popup 1414 is selected by the user, the signature verification method of the device ends.

In step S1310 of FIG. 9, the apparatus performs a function.

The control unit 1010 of the apparatus 1000 may perform a function corresponding to the signature authentication. For example, if the signature is authenticated, the control unit 1010 can purchase the merchandise through the shopping application 1410. In addition, the control unit 1010 can release the screen lock of the device 1000 by authentication signature.

When performing the corresponding function in the apparatus 1000, the signature authentication method of the apparatus is ended.

The method according to an embodiment of the present invention can be implemented in the form of a program command which can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

100: signature registration device 110: input unit
120: registration control unit 130:
140: Storage unit 150: Signature authentication device
160: input unit 170: authentication control unit
180: sensing unit 190:
310: user's hand 320: mobile device
330: pitch of mobile device 1000: device
1001: input pen 1020:
1050: communication unit 1100: wearable device
1110: Control section 1130:
1150:

Claims (27)

In the signature registration apparatus,
An input unit for inputting a signature;
A sensing unit for sensing a state of the signature registration apparatus;
A storage unit;
And a control unit for controlling information stored in the storage unit such that information about the state of the signature registration apparatus sensed through the sensing unit and the input signature while the signature is input through the input unit,
Wherein the state of the signature registration apparatus includes one of a fixed state and a holding state. The method according to claim 1,
Wherein the sensing unit includes a sensor for sensing at least one of a tilt and an acceleration of the signature registration device. 3. The method of claim 2,
Wherein the control unit determines the state of the signature registration apparatus as a fixed state when the detected slope of the signature registration apparatus is within a predetermined range. 3. The method of claim 2,
Wherein the control unit determines the state of the signature registration apparatus to be in a fixed state when the detected acceleration of the signature registration apparatus fluctuates within a predetermined range. A signature registration method in a signature registration apparatus,
Receiving a signature;
Determining the state of the signature registering device sensed by the sensor while the signature is being input;
Storing information on a state of the signature registration apparatus and information on the inputted signature,
Wherein the state of the signature registration device includes one of a fixed state and a holding state. 6. The method of claim 5,
The step of judging the state of the signature registration apparatus
And detects at least one of a slope and an acceleration of the signature registration device. 6. The method of claim 5,
The step of judging the state of the signature registration apparatus
Determines the state of the signature registration apparatus to which the signature is input as a fixed state when the detected signature registration apparatus has a predetermined slope,
Further comprising determining that the signature registration apparatus to which the signature is input is in a fixed state when the acceleration of the detected signature registration apparatus fluctuates within a predetermined range. A signature authentication apparatus comprising:
An input unit for inputting a signature of a user;
A sensing unit for sensing a state of the signature authentication apparatus while the signature is inputted through the input unit;
A storage unit for storing information on a pre-stored registration signature and a status of the device when the signature is registered;
The signature is input to the storage unit using information on the pre-stored registration signature, the state of the apparatus, the signature input through the input unit, and the state of the signature authentication apparatus sensed by the sensing unit, And a control unit for authenticating,
Wherein the device status in the signature registration includes one of a fixed state and a holding state, and the state of the signature authentication apparatus includes one of a fixed state and a holding state. 9. The method of claim 8,
Wherein the sensing unit comprises a sensor for sensing at least one of a tilt and an acceleration of the signature authentication device. 10. The method of claim 9,
Wherein the control unit determines that the signature authentication apparatus to which the signature is input is in a fixed state when the detected signature authentication apparatus has a predetermined slope and that the acceleration of the detected signature authentication apparatus fluctuates within a predetermined range The sign authentication device to which the signature is input is determined to be in a fixed state. 9. The method of claim 8,
Wherein when the state of the apparatus when the signature is registered and the state of the signature authentication apparatus are different from each other, the control unit changes a weight for each feature used for calculating the matching degree of the previously registered signature and the input signature Device. 9. The method of claim 8,
Wherein the control unit changes the authentication success threshold value used for authentication of the input signature when the state of the apparatus and the state of the signature authentication apparatus differ when the signature registration is performed. 10. The method of claim 9,
Wherein the control unit changes the authentication success threshold value used for authentication of the input signature to a downward state when the device state in the signature registration and the state of the signature authentication apparatus are in the holding state. A signature authentication method in a signature authentication apparatus,
Receiving a signature of a user;
Determining a state of the signature authentication apparatus to which the signature is input by a sensor;
Authenticating the input signature by using information on a previously registered signature and device status in the case of signature registration and information on the state of the signature and the signature authentication apparatus,
Wherein the device state when signing registration includes one of a fixed state and a holding state, and the state of the signature authentication apparatus includes one of a fixed state and a holding state. 15. The method of claim 14,
Wherein the step of judging the state of the signature authentication apparatus comprises:
And detecting at least one of a slope and an acceleration of the signature authentication device. 15. The method of claim 14,
The step of judging the state of the signature authentication apparatus
Determines the state of the signature registration apparatus to which the signature is input as a fixed state when the detected signature registration apparatus has a predetermined slope,
Further comprising determining that the signature registration apparatus to which the signature is input is in a fixed state when the acceleration of the detected signature registration apparatus fluctuates within a predetermined range. 15. The method of claim 14,
Wherein the authenticating comprises:
Characterized in that, in correspondence with the comparison between the device status in the case of registering the signature and the status of the signature authenticating device, the weighting value for each feature used for calculating the matching degree of the previously registered signature and the input signature is changed . 15. The method of claim 14,
The authenticating step
Wherein the authentication success threshold used for authentication of the input signature is changed in response to a comparison between the device state and the state of the signature authentication device when the signature registration is performed. A computer-readable recording medium on which a program for implementing the signature authentication method of any one of claims 14 to 18 is recorded. A signature authentication apparatus comprising:
An input unit for inputting a signature of a user;
A storage unit for storing information on a pre-stored registration signature and a user status;
A communication unit for receiving information on a user state from a wearable device;
The input signature is authenticated using the registration signature previously stored in the storage unit, information on the user state, signature entered through the input unit, and information on the user state received from the wearable device through the communication unit And a control unit. 21. The method of claim 20,
Wherein the user state received from the wearable device includes hand tremor, user shake, user action, walks, jogging or drunken state. 21. The method of claim 20,
The control unit changes a weight for each feature used for calculating the degree of matching of the previously registered signature and the input signature when the user state in the signature registration and the user state in the signature verification are different from each other . 21. The method of claim 20,
Wherein the control unit changes the authentication success threshold value used for authentication of the input signature when the device state when signing registration and the user state when signing authentication differ from each other. A signature authentication apparatus comprising:
An input unit for inputting a signature of a user;
A sensing unit for sensing a state of the signature authentication apparatus while the signature is input through the input unit;
A storage unit for storing information on a pre-stored registration signature, information on a user status, and device status;
A communication unit for receiving information on a user state from a wearable device;
Information about the user status, information about the device status, signature entered through the input unit, information about the user status received from the wearable device through the communication unit, And a control unit for authenticating the input signature using information on the device status received from the control unit. 25. The method of claim 24,
The user state received at the wearable device includes hand tremor, user shake, user's action, walking, jogging or drinking state
Wherein the state of the device received at the sensing unit comprises one of a fixed state and a holding state. 25. The method of claim 24,
When the user state and the device status when the signature is registered and the user status and the device status when the signature is authenticated differ from each other, the control unit determines the feature used for calculating the matching degree of the previously registered signature and the input signature And changes the star weights. 25. The method of claim 24,
When the apparatus state in the case of signature registration and the state of the apparatus when the apparatus state is different from the state of the user in the case of authenticating the signature differ from each other, the control unit decreases the authentication success threshold value used for the authentication of the input signature Lt; / RTI >

Images