CN108139856A - Signature authentication method, terminal, writing pencil and system - Google Patents

Signature authentication method, terminal, writing pencil and system Download PDF

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Publication number
CN108139856A
CN108139856A CN201680028530.4A CN201680028530A CN108139856A CN 108139856 A CN108139856 A CN 108139856A CN 201680028530 A CN201680028530 A CN 201680028530A CN 108139856 A CN108139856 A CN 108139856A
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China
Prior art keywords
writing pencil
signature
point
user
data
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CN201680028530.4A
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CN108139856B (en
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李茹
吴黄伟
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Collating Specific Patterns (AREA)
  • User Interface Of Digital Computer (AREA)

Abstract

The present embodiments relate to a kind of signature authentication method, terminal, writing pencil and systems.This method include when user by writing pencil when being signed on the touch panel of terminal, terminal detects the first signed data, and the first signed data includes at the coordinate information and contact point of the contact point of writing pencil and touch panel writing pencil to the pressure information of touch panel；And terminal receives the second signed data that writing pencil is sent, the second signed data include writing pencil detection the motion track information of writing pencil when user is being signed by writing pencil on touch panel and user to the pressure information of writing pencil.First signed data and the second signed data are matched into comparison with the signature template data to prestore, obtain matching rate.When matching rate is not less than preset matching rate threshold value, signature authentication passes through.The embodiment of the present invention extracts more users signature character data by writing pencil, increases the difficulty that attacker imitates user's signature information, improves the safety of Signature Authentication System.

Description

Signature authentication method, terminal, writing pencil and system Technical field
The present invention relates to writing pencil signature authentication technical field more particularly to a kind of signature authentication method, terminal, writing pencil and systems.
Background technique
Writing pencil signature technology has become the important technology that user identity is confirmed in network system virtual environment.Touch panel input handwritten signature of the user using writing pencil in terminal authenticates, and terminal detects the related data of handwritten signature by touch panel and sensor.The related data for the signature that terminal is detected and the signature template data prestored comparison matching judge that user inputs whether handwritten signature verification passes through to identify the signature true and false.Wherein, the related data of the signature of terminal detection includes signature image information and writing pencil to information such as the pressure informations of touch panel
In the prior art, after the attacker that the handwritten signature of user is imitated in trial obtains the signature template data of user, it is successively presented to terminal authentication system, the handwritten signature of user is forged, passes through signature authentication.After attacker's forgery user's handwritten signature verification passes through, the associated rights of user can be illegally obtained, the person or property safety of user are further threatened.
The related data of the prior art only terminal detection handwritten signature is as signature template, and imitability is high, therefore the safety of existing handwritten signature verification system is poor.
Summary of the invention
The present embodiments relate to a kind of signature authentication method, terminal, writing pencil and systems, improve the safety of handwritten signature verification system.
In a first aspect, the embodiment of the invention provides a kind of signature authentication methods, this method comprises: terminal detects the first signed data when user is signed on the touch panel of terminal by writing pencil, the One signed data include at the coordinate information and contact point of the contact point of writing pencil and touch panel writing pencil to the pressure information of touch panel；And terminal receives the second signed data that writing pencil is sent, the second signed data includes the pressure information of the motion track information of writing pencil when user is signed on touch panel by writing pencil that writing pencil detects and user to writing pencil.First signed data and the second signed data are matched into comparison with the signature template data prestored, obtain matching rate.When matching rate is not less than preset matching rate threshold value, signature authentication passes through.
The embodiment of the present invention uses writing pencil during the touch panel of terminal inputs handwritten signature in user, more user's signature characteristics are extracted by writing pencil, comparison matching increases the difficulty that attacker imitates user's signature information, improves the safety of Signature Authentication System.
In a kind of possible embodiment, the first signed data is synchronous with the sampling time of the second signed data and sample frequency holding.
Signature Authentication System provided in an embodiment of the present invention, so that attacker while imitating user handwriting, will also imitate the hand motion of user, the safety of Signature Authentication System is greatly improved in pole.
In a kind of possible embodiment, it signs and corresponds to the first signature character point and the second signature character point, first signature character point includes at least one of the set point of contact point composition, and the second signature character point includes writing pencil in touch panel at least one of the set of point in the motion profile of exterior domain point；The first signature character point and the corresponding data of the second signature character point are extracted from the first signed data and the second signed data；The Data Matching of each characteristic point in first signature character point and the corresponding data of the second signature character point and signature template data is compared, matching rate is obtained.
In a kind of possible embodiment, the corresponding data of the first signature character point include: the coordinate information of the corresponding contact point of the first signature character point, the writing pencil pressure information of the location information of writing pencil and user to writing pencil to the pressure information of touch panel and when identical as the sampling time of the first signature character point at the corresponding contact point of the first signature character point；Wherein, the location information of writing pencil is obtained by the motion track information of writing pencil.
Wherein, when detection writing pencil motion profile coordinate system and detection contact point coordinate coordinate system transformation after reunification, the position coordinates of the position coordinates of the writing pencil tip of the brushstyle of a writing or painting and contact point in touch panel region It is overlapped.
In a kind of possible embodiment, location information that the corresponding data of the second signature character point include: the corresponding writing pencil of the second signature character point and user are to the pressure information of writing pencil.
In a kind of possible embodiment, the second signed data further include: the acceleration of writing pencil, the writing pencil when user is signed on touch panel by writing pencil of writing pencil detection are by the compression area information of user's pressure and the range information of shape information and writing pencil pressurized zone away from the writing pencil tip of the brushstyle of a writing or painting of pressurized zone.
In a kind of possible embodiment, the first signature character point specifically includes one or more of following points, first contact point, the last one contact point, discontinuous contact point or the big contact point of Curvature varying.
Specifically, during discontinuous contact point pair should sign, the starting point of different strokes.Inflection point in the big corresponding stroke of point of curvature transformation.
In a kind of possible embodiment, second signature character point specifically includes one or more of following points: in touch panel with the maximum point of the corresponding curve mean curvature of the motion profile of every section of discontinuous writing pencil in exterior domain, or touch panel in the corresponding curve of motion profile of every section of discontinuous writing pencil in exterior domain apart from touch panel apart from farthest point.
Wherein, the highest point that writing pencil is started writing between corresponding two strokes of point farthest apart from touch panel distance in the corresponding curve of motion profile of the maximum point of the corresponding curve mean curvature of the motion profile of every section of discontinuous writing pencil or every section of discontinuous writing pencil.
In a kind of possible embodiment, the first signature character point is extracted from contact point；By the motion profile of the writing pencil tip of the brushstyle of a writing or painting, the first plane where touch panel is projected, and obtains the first motion profile of the writing pencil tip of the brushstyle of a writing or painting；The motion profile of the writing pencil tip of the brushstyle of a writing or painting is projected in the second plane vertical with the first plane, third plane, obtains the second motion profile and third motion profile of the writing pencil tip of the brushstyle of a writing or painting, the second plane is vertical with third plane；The second signature character point is extracted from least one motion profile in the first motion profile, the second motion profile and third motion profile；The first signature character point and the corresponding data of the second signature character point are extracted from the first signed data and the second signed data；First signature character point and second are signed The Data Matching of each characteristic point compares in the corresponding data of name characteristic point and signature template data, obtains matching rate.
In a kind of possible embodiment, according to the environment preset matching rate threshold value where terminal.
The embodiment of the present invention can also set different matching rate threshold values, be suitable for user's actual need, have a good application prospect according to environment where terminal.
Second aspect, the embodiment of the invention provides a kind of signature authentication methods, this method comprises: when user is signed on the touch panel of terminal by writing pencil, writing pencil detects the second signed data, and motion track information that the second signed data includes writing pencil and user are to the pressure information of writing pencil；Second signed data is sent to terminal by writing pencil, so that terminal determines whether signature authentication passes through according to the first signed data that the second signed data and terminal detect, the first signed data include at the coordinate information and contact point of the contact point of writing pencil and touch panel writing pencil to the pressure information of touch panel.
In a kind of possible embodiment, the second signed data further include: the acceleration of writing pencil, the writing pencil when user is signed on touch panel by writing pencil of writing pencil detection are by the compression area information of user's pressure and the range information of shape information and writing pencil pressurized zone away from the writing pencil tip of the brushstyle of a writing or painting of pressurized zone.
Specifically, the hand motion feature of the second signature character data reflection user.When different user inputs handwritten signature, holds the dynamics of writing pencil, shape and hold a pen that there may be difference for distance of the region away from the tip of the brushstyle of a writing or painting.
In a kind of possible embodiment, the first signed data is synchronous with the sampling time of the second signed data and sample frequency holding.
The third aspect, the embodiment of the invention provides a kind of terminal, which includes: touch panel, display panel, sensor, processor, memory, communication unit.
Touch panel, the signature inputted for receiving user by writing pencil.Display panel, for showing the image of signature.Touch panel is also used to detect the coordinate information of the contact point of writing pencil and touch panel. Sensor, for detecting at contact point writing pencil to the pressure information of touch panel；Writing pencil forms the first signed data to the pressure information of touch panel at the coordinate information of contact point and contact point.Communication unit, it is communicated to connect for being established with writing pencil, the second signed data that writing pencil is sent is received, the second signed data includes the pressure information of the motion track information of writing pencil when user is signed on touch panel by writing pencil that writing pencil detects and user to writing pencil.Memory, for storing preset matching rate threshold value.Processor obtains matching rate for the first signed data and the second signed data to be matched comparison with the signature template data prestored；When matching rate is not less than preset matching rate threshold value, instruction display panel shows the prompt information that signature authentication passes through.Display panel is also used to show the prompt information that signature authentication passes through.
In a kind of possible embodiment, processor is also used to be sent to writing pencil to the sampling time of writing pencil and the control information of sample frequency, synchronous with the sampling time of the second signed data and sample frequency holding to control the first signed data.
In a kind of possible embodiment, it signs and corresponds to the first signature character point and the second signature character point, first signature character point includes at least one of the set point of contact point composition, and the second signature character point includes writing pencil in touch panel at least one of the set of point in the motion profile of exterior domain point；Processor, specifically for extracting the first signature character point and the corresponding data of the second signature character point from the first signed data and the second signed data；The Data Matching of each characteristic point in first signature character point and the corresponding data of the second signature character point and signature template data is compared, matching rate is obtained.
In a kind of possible embodiment, processor, specifically for extracting the first signature character point from contact point；By the motion profile of the writing pencil tip of the brushstyle of a writing or painting, the first plane where touch panel is projected, and obtains the first motion profile of the writing pencil tip of the brushstyle of a writing or painting；The motion profile of the writing pencil tip of the brushstyle of a writing or painting is projected in the second plane vertical with the first plane, third plane, obtains the second motion profile and third motion profile of the writing pencil tip of the brushstyle of a writing or painting, the second plane is vertical with third plane；The second signature character point is extracted from least one motion profile in the first motion profile, the second motion profile and third motion profile；The first signature character point and the corresponding data of the second signature character point are extracted from the first signed data and the second signed data；By the data of each characteristic point in the first signature character point and the corresponding data of the second signature character point and signature template data Matching comparison, obtains matching rate.
In a kind of possible embodiment, processor is also used to determine the environment where terminal according to the network that communication unit connects, according to the environment preset matching rate threshold value where terminal.
Fourth aspect, the embodiment of the invention provides a kind of writing pencil, which includes: sensor unit, processor, communication unit.
Sensor unit, the motion track information and user for detecting writing pencil when user is signed on the touch panel of terminal by writing pencil are to the pressure information of writing pencil.
Processor for the motion track information of writing pencil and user to be converted into the second signed data that terminal is capable of handling to the pressure information of writing pencil, and indicates that communication unit is sent to terminal.
Communication unit communicates to connect for establishing with terminal, and the second signed data is sent to terminal.
In a kind of possible embodiment, sensor unit, it is also used to when user is signed on the touch panel of terminal by writing pencil, the acceleration that detects writing pencil, writing pencil are by the compression area information of user's pressure and the range information of shape information and writing pencil pressurized zone away from the writing pencil tip of the brushstyle of a writing or painting of pressurized zone.
In a kind of possible embodiment, it is characterized in that, communication unit, be also used to receive terminal transmission to the sampling time of sensor unit and the control information of sample frequency, it is synchronous with the sampling time of the second signed data and sample frequency holding to control the first signed data.
5th aspect, the embodiment of the invention provides a kind of Signature Authentication System, the writing pencil of the terminal provided including the above-mentioned third aspect and the offer of above-mentioned fourth aspect.
Signature authentication method, terminal, writing pencil and system provided in an embodiment of the present invention, terminal and writing pencil detect the related data of signature simultaneously, the related data of signature is matched with the signature template data comparison prestored, and determines whether signature authentication passes through according to matching rate.The embodiment of the present invention uses writing pencil during the touch panel of terminal inputs handwritten signature in user, more user's signature characteristics are extracted by writing pencil, comparison matching, so that attacker is while imitating user handwriting, also to imitate the hand motion of user, increase the difficulty that attacker imitates user's signature information, pole is greatly improved signature and recognizes The safety of card system.
Detailed description of the invention
Fig. 1 is Signature Authentication System configuration diagram provided in an embodiment of the present invention；
Fig. 2 is the terminal architecture schematic diagram that present invention implementation provides；
Fig. 3 is writing pencil framework provided in an embodiment of the present invention signal；
Fig. 4 is the coordinate system and signature schematic diagram of Signature Authentication System provided in an embodiment of the present invention；
Fig. 5 is Signature Authentication System method signaling interaction diagram provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is described, it is clear that, described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, shall fall within the protection scope of the present invention.
" attacker " that the embodiment of the present invention refers to refers to attempting to imitate the feature of the handwritten signature of user's input, and imitates user and input during handwritten signature, the correlated characteristic of hand motion of user etc., to pass through the other users of the certification of terminal.For " other users " that the embodiment of the present invention refers to refer to the opposite user A for inputting handwritten signature A, " other users " are different from the user A of input handwritten signature A.Wherein, the related data of the handwritten signature of each user and the user corresponds.A refers to any user.
" contact point " that the embodiment of the present invention refers to refers to the contact point of writing pencil and touch panel.It is understood that the contact point of writing pencil and touch panel forms handwritten signature image.
" motion profile " for the writing pencil that the embodiment of the present invention refers to refers to the curve of certain point corresponding point composition on the different location of space on writing pencil.For example, the writing pencil tip of the brushstyle of a writing or painting is in the motion profile that the curve that the difference that space is streaked forms is the writing pencil tip of the brushstyle of a writing or painting.
When " pen holding posture " of the user that the embodiment of the present invention refers to refers to that user holds a pen, compression area and/or pressed shape that writing pencil is under pressure.When " hold a pen dynamics " of the user that the embodiment of the present invention refers to refers to that user holds a pen, to the pressure information of writing pencil.It should be noted that different user may correspond to different pen holding postures and the characteristic informations such as dynamics that hold a pen.
Numerical value of the curve that " curvature " that the embodiment of the present invention refers to refers in the bending degree of certain point.Curvature is bigger, indicates that the bending degree of curve is bigger." the biggish point of Curvature varying " refers to that curvature bending converts obvious point.Such as the specific word in signature, and stroke " lifting-hook (Yin) " there are the biggish points of two Curvature varyings.The biggish point of Curvature varying is not present in stroke " horizontal line-".
" matching rate " that the embodiment of the present invention refers to refers to the matching degree after data and data comparison.
" the matching rate threshold value " that the embodiment of the present invention refers to refers to that terminal can a preset matching rate thresholding (matching rate threshold value) when user inputs handwritten signature and authenticates.When user's input handwritten signature authenticates, when the matching rate of the related data of handwritten signature and signature template data is not less than the matching rate threshold value, terminal can determine that the handwritten signature verification of the user passes through.For example, matching rate threshold value is 70%, when the related data of the handwritten signature for the user that terminal calculates and the matching rate of signature template data are 75%, due to 75% > 70%, then terminal determines that the handwritten signature verification of user passes through.
" default " that the embodiment of the present invention refers to refers to presetting." preset matching rate threshold value " refers to a matching rate threshold value being preset, to judge whether certification passes through before user's input handwritten signature authenticates.
" the first signed data " that the embodiment of the present invention refers to refers to the related data of the signature of terminal detection, such as the image information of signature, writing pencil to pressure information of the touch panel of terminal etc..
During " the second signed data " that the embodiment of the present invention refers to refers to the related data of the signature of writing pencil detection, such as user inputs handwritten signature by writing pencil, user is to the pressure information of writing pencil and the motion track information of writing pencil etc..
" time relationship " that the embodiment of the present invention refers to refers to the detection time relationship of " the first signed data " and " the second signed data ".For example, when touch panel is synchronous with sample frequency holding with the sampling time of writing pencil, identical sampling time corresponding first signed data and the second signed data are corresponding.
" spatial relationship " that the embodiment of the present invention refers to refers to the spatial relation of " the first signed data " and " the second signed data " corresponding point.It is understood that in the same coordinate system, the position where the writing pencil tip of the brushstyle of a writing or painting is identical as the position where contact point when the writing pencil tip of the brushstyle of a writing or painting and touch panel are contacted.
" characteristic point " that the embodiment of the present invention refers to refer in user's handwritten signature image, representational point.By taking the handwritten signature of user is its Chinese Name as an example, what the surname and name of user was made of stroke.Different strokes may be discontinuous.The habit and write of different sizes that each user writes.But the stroke of each " word " is to immobilize in signature.Therefore, the starting point that each stroke of user's handwritten signature can be chosen, as the characteristic point of user's handwritten signature.Wherein, the starting point of each stroke is presented as the discontinuous contact point of touch panel detection.
Further, " the signature character point " that the embodiment of the present invention refers to refers to the characteristic point of the part of representative extracted from the corresponding characteristic point of the first signed data and the corresponding characteristic point of the second signed data.Wherein, the point that writing pencil is contacted with touch panel is fisrt feature point, and writing pencil is in touch panel using the point of exterior domain as second feature point.For example, " signature character point " includes one or more of contact points such as first contact point of writing pencil and touch panel, the last one contact point, discontinuous contact point, the biggish contact point of Curvature varying." signature character point " further includes the point that writing pencil is farthest apart from touch panel in the corresponding writing pencil motion profile in two discontinuous contact points.
It will be appreciated by persons skilled in the art that during writing pencil is started writing every time, the writing pencil distance farthest apart from touch panel can reflect the writing style of different user to a certain extent.For example, user inputs during handwritten signature, needs to lift writing pencil when inputting discontinuous stroke and leave touch panel movement, wherein write between two strokes, the distance in the farthest point that the writing pencil that different user drives leaves touch panel is different.
The security situation of environment where " security level " that the embodiment of the present invention refers to refers to Signature Authentication System.For example, at home or the environment such as car, signature authentication is carried out, it is relatively safe for a user.In a more specific example, user needs to input handwritten signature in the touch panel of its PC, to open access right.When user's Handheld Personal Computer is stayed at home or it is interior, it is compared His public area, family or its environment inside car are not easy to be occupied by attacker, therefore security level is relatively high.Specifically, the security level of varying environment where Signature Authentication System being distinguished by " first ", " second ", " third " etc..Wherein, " first " can be set as highest security level, successively downgrade.If family or car are " the first security level grade ", office is " the second security level ", and open air is " third security level ".
Further, in relatively safe environment, a possibility that attacker occupies, is low, then settable relatively low matching rate threshold value, preferably to adapt to the demand of user.Specifically, different matching rate threshold values can be preset according to different security levels.When such as the first security level, matching rate threshold preset is 60%.When the second security level, matching rate threshold preset is 70%.When third security level, matching rate threshold preset is 80%.It is understood that the setting of the division mode and matching rate threshold value of specific security level, can adjust, this will not be repeated here as needed.
Furthermore, in the description of the present application, unless otherwise indicated, " first ", " second ", " third " etc. are only used for distinguishing different data, signature character point perhaps security level should not be understood as specific restriction to data, signature character point or security level.
Fig. 1 is Signature Authentication System configuration diagram provided in an embodiment of the present invention.As shown in Figure 1, comprising: terminal 100 and writing pencil 200.Wherein, terminal 100 includes touch panel.User inputs handwritten signature in the touch panel of terminal 100 using writing pencil 200, and terminal 100 detects signature image information and writing pencil 200 to the related data of the handwritten signatures such as the pressure information of terminal 100；Meanwhile the motion track information that detects writing pencil 200 of writing pencil 200 and user be to the related datas of the handwritten signatures such as the pressure information of writing pencil 200, and is sent to terminal 100.Above-mentioned terminal 100 and writing pencil 200 are detected the related data and the matching rate of signature template data of the handwritten signature of user's input by terminal 100, and when matching rate is not less than preset matching rate threshold value, terminal 100 confirms that the handwritten signature verification of user's input passes through.
In one example, after the handwritten signature verification of user's input passes through, terminal 100 may allow user to continue to access the associated rights of 100 corresponding function of terminal.
As above, the related data of the handwritten signature of user's input can include: the pressure information of the contact point of the image information of signature, writing pencil 200 and touch panel that terminal 100 detects.And writing pencil 200 is examined User is to the pressure information of lettering pen 200 and the motion track information of writing pencil 200 during the user of survey inputs handwritten signature.
Wherein, to simplify explanation, the related data that terminal 100 detects handwritten signature is classified as the first signed data.The related data that writing pencil 200 detects handwritten signature is classified as the second signed data.Writing pencil 200 is sent to terminal 100 by the second signed data that communication link 300 is detected.
Signature Authentication System provided in an embodiment of the present invention, when user is using writing pencil input handwritten signature, terminal detects the first signed data, meanwhile, writing pencil detects the second signed data and is sent to terminal.Terminal judges whether the handwritten signature of user's input authenticates and passes through according to the first signed data and the second signed data and the signature template data prestored.
It is understood that user, before carrying out signature authentication, the handwritten signature of user's pre-input is as the matched template of comparison.When template data of signing is the handwritten signature of user's pre-input, the related data of the handwritten signature of terminal 100 and the detection of writing pencil 200.Terminal 100 will sign template data preservation in memory, input handwritten signature in user and carry out in verification process, call the signature template data stored in memory.
Specifically, when terminal 100 matches the related data for the handwritten signature that terminal 100 and writing pencil 200 detect with signature template data comparison, the processor of terminal 100 can carry out characteristic point data extraction to the related data of handwritten signature, be compared with facilitating.It is understood that signature template data equally corresponds to the data of related signature characteristic point.
It is understood that the speed that user inputs handwritten signature every time may be different.If user's last time inputs handwritten signature used time 1S, inputting handwritten signature next time may used time 0.8S.But the handwritten signature of each user can compare attribute there are it, such as the not homogeneous corresponding signature image of signing of user is similar.Therefore by the data of characteristic point, handwritten signature is compared.
In one example, the processor of terminal 100 can extract first contact point, the last one contact point, discontinuous contact point, the biggish contact point of Curvature varying etc. as the first signature character point.Extract the data of the corresponding contact point coordinate of signature character point, writing pencil to the pressure of touch panel, the coordinate of writing pencil, user to data such as the pressure of writing pencil as the first signature character point.In addition, the processor of terminal 100 can also by writing pencil when touch panel is with exterior domain where point also as signature character point.Example Such as, terminal 100 extract in two corresponding sampling time intervals in discontinuous contact point writing pencil apart from touch panel apart from farthest o'clock as the second signature character point.Extract the data of the coordinate, user of the corresponding writing pencil of signature character point to data such as the pressure of writing pencil as the second signature character point.
Touch panel of the user by lettering pen 200 in terminal 100 inputs handwritten signature, and terminal 100 shows signature image by display panel.In addition, instruction display panel display authenticates the prompt information passed through when the handwritten signature verification that terminal 100 determines that user inputs passes through.
As shown in Figure 1, writing pencil 200 and terminal 100 can realize information exchange by communication link 300.Wherein, communication link 300 here can be one of WiFi network, USB interface, bluetooth connection or infrared connection etc. or a variety of.
It should be noted that the information exchange of writing pencil 200 and terminal 100.To include: writing pencil 200 send the related data for the handwritten signature that it is detected to terminal 100 by communication link 300 and/or terminal 100 is sent to writing pencil 200 to the sampling time of writing pencil 200 and the control information of sample frequency by communication link 300.
Specifically, touch panel can detect the coordinate information of writing pencil 200 with the contact point of touch panel.Can be by the integrated pressure sensor on touch panel, pressure information of the writing pencil 200 to touch panel at detection contact point.
Specifically, writing pencil 200 can detect the motion track information of writing pencil 200 by Integrated Accelerometer, magnetic field strength transducer and angular-rate sensor etc..Writing pencil 200 can detect user to the pressure information of writing pencil 200 by pressure sensor.
It is understood that preset matching rate threshold value can adjust according to actual needs.Wherein it is possible to set matching rate threshold value according to security level.Matching rate threshold value can also directly be set.In a possible example, terminal 100 can by detect its connection network, determine terminal 100 in environment.Further determine that corresponding security level and matching rate threshold value.
It is understood that hold a pen dynamics of the user of writing pencil detection to the pressure information reflection user of writing pencil.The related data of the handwritten signature of user's input may also include that compression area and/or pressed shape information of the writing pencil of the detection of writing pencil 200 by user's pressure.Wherein, writing pencil is by user's pressure Compression area and/or pressed shape reflection user hold a pen the posture of (writing pencil).Such as, user g1 habit is held a pen using thumb and index finger, to the pressure information of writing pencil and the compression area of writing pencil and/or pressed shape when being held a pen by pre-saving user g1 using thumb and index finger, with when user g1 inputs handwritten signature again and authenticates, compare with the user g1 that prestores hold a pen dynamics and whether pen holding posture matches.
Specifically, the pen holding posture of user can refer to above-mentioned user and hold a pen the detection mode of dynamics, by pressure sensor or touch sensor is used in combination obtains.
It is understood that the related data of the handwritten signature of user's input may also include that the acceleration for the writing pencil movement that writing pencil 200 detects.For example, the acceleration of the writing pencil tip of the brushstyle of a writing or painting.
Specifically, the acceleration of the writing pencil tip of the brushstyle of a writing or painting can be obtained by above-mentioned acceleration transducer.It can also be obtained by the moving track calculation of writing pencil.
It is understood that the related data of the handwritten signature of user's input may also include that range information of 200 pressurized zone of writing pencil away from the writing pencil tip of the brushstyle of a writing or painting.Wherein, the habit that holds a pen of distance reflection different user of the writing pencil pressurized zone away from the writing pencil tip of the brushstyle of a writing or painting.For example, some users like the middle part to hold a pen, write.Some users like the upper end to hold a pen, write etc..
In the other embodiments of the embodiment of the present invention, the security level or matching rate threshold value of environment where it being inputted to terminal 100 from other users.In a specific application scenarios, such as, user C is when bank handles related service, it needs to input handwritten signature and carries out authentication, other users are bank clerk D at this time, bank clerk D can according to actual needs, input the matching rate threshold value when progress handwritten signature verification of user C to terminal 100.
In other embodiments of the invention, writing pencil 200 be can integrate on the terminal 100, such as slot is arranged in terminal 100, and writing pencil 200 can be inserted into terminal 100, when user signs, is extracted writing pencil 100 and is used.To simplify explanation, the embodiment of the present invention is only illustrated so that writing pencil 200 is separated with terminal 100 as an example.
In other embodiments of the invention, terminal 100 can be the smart phone with touch screen, the terminal with touch screen.In addition, touch screen/touch panel can be split with terminal, touch screen is individually integrated, At this point, touch screen can also be referred to as handwriting pad.The Signature Authentication System will include touch screen (handwriting pad), terminal and writing pencil.Wherein, touch screen is used to receive the handwritten signature of user and detects the information of signature image, and integrated pressure sensor is on touch screen to detect the pressure information of writing pencil.Touch screen records the related data of handwritten signature, and is sent to terminal.The embodiment of the present invention is only illustrated so that touch screen and terminal are integrated as an example.
The signed data of detection of the embodiment of the present invention include the signature of terminal detection image information and writing pencil to the user of the pressure information and writing pencil of terminal detection using the motion track information and user of writing pencil when writing pencil input signature to the pressure information of writing pencil.Signature Authentication System provided in an embodiment of the present invention, during user is signed using writing pencil, more user's signature characteristics are extracted by writing pencil simultaneously, comparison matching, so that attacker is while imitating user handwriting, the hand motion of user is also imitated, increases the difficulty that attacker imitates signed data, the safety of Signature Authentication System is greatly improved in pole.
Correspondingly, the embodiment of the present invention also provides a kind of terminal, for realizing the system provided in previous embodiment.As shown in Fig. 2, the terminal includes: the components such as display screen 110, sensor 120, I/O subsystem 130, processor 140, memory 150, communication unit 160 and power supply 170.It is specifically introduced below with reference to each component parts of the Fig. 2 to terminal 100:
Display screen 110 inputs handwritten signature for receiving user, is also used to show the prompt information of the handwritten signature image of user's input or the handwritten signature verification result of display user's input and the various menus of terminal 100.Specific display screen 110 may include touch panel 111 and display panel 112.
Touch panel 111, also referred to as touch screen, touch-sensitive screen etc. collect the on it or neighbouring contact of user or Touchless manipulation.For example, user uses operation of any suitable object on touch panel 111 or near touch panel 111 such as writing pencil (stylus).Optionally, touch panel 111 may include both touch detecting apparatus and touch controller.Wherein, touch orientation, the posture of touch detecting apparatus detection writing pencil, and touch operation bring signal is detected, transmit a signal to touch controller.Touch controller receives touch information from touch detecting apparatus, and is converted into the letter that processor 140 is capable of handling Breath.In addition, touch controller can receive the order that processor 140 is sent and be executed.
In one example, the touch orientation of writing pencil and 111 contact point of touch panel that touch detecting apparatus detects is converted into the coordinate information of contact point by touch controller, and the coordinate information of contact point is sent to processor 140.
Further, touch panel 111 can cover display panel 112, the content that user can show according to display panel 112, on the touch panel 111 covered on display panel 112 or nearby operated, after touch panel 111 detects operation on it or nearby, processor 140 is sent to by I/O subsystem 130 to determine that user inputs, and is followed by subsequent processing device 140 according to the input of user and is provided corresponding visual output on display panel 112 by I/O subsystem 130.Although in Fig. 2, touch panel 111 and display panel 112 are the input and input function for realizing terminal 100 as two independent components, but it is in some embodiments it is possible to touch panel 111 and display panel 112 is integrated and that realizes terminal 100 output and input function.
I/O subsystem 130 may include display controller 131, sensor controller 132, other input device controls devices 133 for controlling the external equipment of input and output.Wherein, display controller 131 receives signal from display screen 110, and/or sends signal to display screen 110.After display screen 110 detects the handwritten signature information of user's input, the handwritten signature information for user's input that display controller 131 will test is converted to and is shown in the interaction of the user interface object on display screen 110.For example, the handwritten signature information that user inputs is converted to display in the handwritten signature image of display panel 112 by display controller 131, human-computer interaction is realized.Sensor controller 132 can receive signal from one or more sensor 120, and/or send signal to one or more sensor 120.
Terminal 100 may also include at least one sensor 120, such as pressure sensor 121 and other sensors 122.Specifically, pressure sensor 121, the pressure information being subject to for detecting terminal 100.Further, pressure sensor 121 can be integrated in display screen 110, detects writing pencil to the pressure information of touch panel 111, and processor 140 is sent to by sensor controller 132.Specifically, pressure sensor 121 is arranged and is covered on touch panel 111 between touch panel 111 and display panel 112, or by pressure sensor 121, pressure sensor 121 is made to detect writing pencil to the pressure information of touch panel 111.
Wherein, the writing pencil that the coordinate information and pressure sensor 121 for the contact point that touch panel 111 detects detect can be unified for the first signed data of the detection of terminal 100 to the pressure information of touch panel 111.
Processor 140 is the control centre of terminal 100, utilize the various pieces of various interfaces and the entire terminal of connection, by running or executing the software program and/or module that are stored in memory 150, and call the data being stored in memory 150, the various functions and processing data for executing terminal 100, to carry out integral monitoring to terminal 100.Optionally, processor 140 may include one or more processing units.Preferably, processor 140 can integrate application processor and modem processor, wherein the main processing operation system of application processor, user interface and application program etc., modem processor mainly handles wireless communication.It is understood that above-mentioned modem processor can not also be integrated into processor 140.
In one example, user inputs during handwritten signature, and the first signed data that display controller 131 and sensor controller 132 will test is sent to application processor.Meanwhile writing pencil 200 detects the second signed data and is sent to terminal 100.The second signed data that the received writing pencil 200 of modem processor is sent, and it is sent to application processor.Application processor judges whether the handwritten signature verification of user's input passes through by the software program in run memory 150 and the signature template data in calling memory 150, according to the first signed data of handwritten signature and the second signed data.First signed data and the second signed data are matched comparison with signature template data by application processor, obtain corresponding matching rate.When matching rate is not less than preset matching rate threshold value, application processor determines that signature authentication passes through, and instruction display screen 110 shows the prompt information that signature authentication passes through.
Communication unit 160, for realizing the information exchange of terminal 100 and extraneous network or equipment.It may include wireless communication module and/or communication interface.Wherein, during wireless communication module can be used for receiving and sending messages, signal is sended and received, for example, radio circuit or WiFi module.Communication interface can be used for being directly connected to external device, realize terminal 100 and external equipment interactive information.For example, USB interface.In addition, communication unit 160 may also include the component of the achievable terminal 100 and extraneous network or the information exchange of equipment such as infrared module, bluetooth module, it is not specifically limited herein.
Terminal 100 further includes the power supply 170 (such as battery) powered to all parts, it is preferred that power supply 170 can be logically contiguous by power-supply management system and processor 140, to pass through power-supply management system reality The functions such as now management charging, electric discharge and power consumption.
Terminal 100 may also include other input equipments 180, other input equipments 180 are connected with other input device controls devices 133 of I/O subsystem 130, carry out information exchange with processor 140 under the control of other equipment input controller 133.This will not be repeated here.
In a specific example, user is using writing pencil 200 when the display screen 110 of terminal 100 inputs handwritten signature, the bearing signal of the contact point of the touch detecting apparatus detection writing pencil 200 and touch panel 111 of touch panel 111, the bearing signal of above-mentioned contact point is converted into coordinate information by the touch controller of touch panel 111, and is sent to processor 140 by display controller 131.Pressure sensor 121 detects writing pencil 200 at above-mentioned contact point to the pressure information of touch panel 111, and is sent to processor 140 by sensor controller 132.It is understood that the first signed data can be denoted as the pressure information of the coordinate information of above-mentioned contact point and contact point.In addition, the handwritten signature for user's input that display controller 131 will test is converted to the signature image that can be displayed on display screen 110, so that user checks after display screen 110 detects the handwritten signature that user inputs.
Terminal 100 receives the second signed data that writing pencil 200 detects by communication unit 160.Wherein, second signed data includes: user by writing pencil 200 input above-mentioned handwritten signature when, writing pencil 200 detect the motion track information of writing pencil, the acceleration of the writing pencil tip of the brushstyle of a writing or painting, writing pencil by the compression area and/or pressed shape information of user's pressure and user to relevant informations such as the pressure informations of writing pencil 200.First signed data and the second signed data are compared with the signature template data being pre-stored in memory 150 and are matched by processor 140, calculate matching rate.Processor 140 is by the above-mentioned matching rate being calculated and the matching rate threshold value comparison being pre-stored in memory 150, and when the above-mentioned matching rate threshold value being calculated is not less than the matching rate threshold value prestored, processor 140 determines that the handwritten signature verification of above-mentioned user passes through.Processor 140 indicates the prompt information that display panel 112 shows that user's handwritten signature verification passes through.
Specifically, 100 processor 140 of terminal can extract the data of signature character point by the first signed data and the second signed data.The data of the signature character extracted point are compared with the Data Matching of the corresponding signature character point in signature template, calculate matching rate.Wherein, signature character point includes the first signature character point and the second signature character point.The data of signature character point include the data and second of the first signature character point The data of signature character point.The extracting method of specific signature character point and its data, reference can be made to being discussed in detail in Fig. 4.
It should be noted that, the user is inputted before above-mentioned handwritten signature using writing pencil 200, the instruction for indicating the identity information of the user can be sent to processor 140 from the user or other users, processor 140 can call the signature template data of the user according to the instruction of the identity information of instruction user from memory 150.
Specifically, the instruction for indicating the identity information of the user can be the identification card number of the user, the information such as work number of the user.Wherein, the signature template data of multiple users is prestored in memory 150, the signature template data of each user carries the identity information of the user.After processor 140 receives the instruction for indicating the identity information of the user, the signature template data of the user is inquired in memory 150 according to the identity information of user.Wherein, the signature template data of each user carries the identity information of the user.
It is understood that considering the intrinsic difference for the handwritten signature that user inputs every time, the signature template data of each user may include multiple.I.e. in user's pre-input handwritten signature, user can repeatedly be inputted handwritten signature (template), and terminal 100 and writing pencil 200 detect the data of each handwritten signature (template), and save one by one.The stage that handwritten signature is authenticated is inputted in user, the signed data for the authentication phase that terminal 100 and writing pencil 200 detect is compared one by one with multiple signature template datas of the user and is matched by processor 140, selection maximum matching rate is final comparison matching rate, according to preset matching rate threshold value, judge whether user's signature certification passes through.
It is understood that signature template data also includes the first signature (template) data that terminal 100 detects and second signature (template) data that writing pencil 200 detects.In addition, signature template data may include the data of the corresponding signature character point extracted.The extracting method of specific signature character point and its data, reference can be made to being discussed in detail in Fig. 4.
Correspondingly, the embodiment of the present invention also provides a kind of writing pencil, for realizing the system provided in previous embodiment.As shown in figure 3, the writing pencil includes: the components such as sensor unit 210, communication unit 220, processor 230, memory 240, power supply 250.Below with reference to Fig. 3 to each of writing pencil 200 A component parts is specifically introduced:
Sensor unit 210, for detecting relevant subscription data of the user using writing pencil 200 during the touch panel 111 of terminal 100 inputs handwritten signature.Specifically, sensor unit 210 may include acceleration transducer 211, magnetic field strength transducer 212, angular-rate sensor 213, pressure sensor 214 and other sensors 215.
In a kind of possible embodiment, acceleration transducer 211 can be used for detecting the acceleration of 200 tip of the brushstyle of a writing or painting of writing pencil, magnetic field strength transducer 212 can be used for detecting the magnetic field strength of writing pencil 200, angular-rate sensor 213 can be used for detecting the angular speed of writing pencil 200.Further, the motion track information of writing pencil 200 can be obtained according to the change information of the acceleration of writing pencil 200, angular speed and magnetic field strength.Pressure sensor 214 can be used for detecting user to the pressure information of writing pencil 200.
It should be noted that other sensors 215 may include with sensors such as gyroscope, gravity sensor, WiFi alignment sensor or infrared alignment sensors.Wherein, above-mentioned acceleration transducer 211, magnetic field strength transducer 212, angular-rate sensor 213 for detecting the motion track information of writing pencil 200 can be replaced by the one or more in other sensors 215.The embodiment of the present invention does not limit sensor used in detection 200 motion trace data of writing pencil specifically.It is understood that sensor or instrument for detecting writing pencil motion profile, should belong to the protection scope of the embodiment of the present invention.
Sensor unit 210 can also detect compression area information and pressed shape information and writing pencil pressurized zone range information etc. away from the writing pencil tip of the brushstyle of a writing or painting of the writing pencil by user's pressure by related sensor.Here related sensor may include touch sensor.Above- mentioned information also can be used as one of second signed data or a variety of, to reflect the habit that holds a pen of different user.By the comparison of features described above information, increase the imitation difficulty of attacker.
Communication unit 220 realizes the information exchange of writing pencil 200 and terminal 100 for connecting with aforementioned communication unit 160.Wherein, communication unit 220 may also comprise to the corresponding communication module of communication unit 160 and/or communication interface.For example, communication unit 160 includes WiFi module 1, communication unit 220 includes that corresponding WiFi module 2, terminal 100 and writing pencil 200 pass through WiFi module 1 and the foundation communication connection of WiFi module 2.
Processor 230 executes for running or executing the software program and/or module that are stored in memory 240 and changes the relevant subscription data that sensor unit 210 detects into information that terminal 100 is capable of handling.Such as, acceleration information, magnetic field strength information and the angular velocity information that acceleration transducer 211, magnetic field strength transducer 212, angular-rate sensor 213 detect writing pencil 200 are converted to the motion track information for the writing pencil that terminal 100 is capable of handling by processor 230, and are sent to terminal 100.
In addition, processor 230 is also used to control sampling time and the sample frequency of sensor unit 210 by control information.It is understood that above-mentioned control information can also be issued by terminal 100, it is synchronous with 100 touch panel of terminal and sensor holding with the sampling time and the sample frequency that control writing pencil 200.
Memory 240 for storing related software and/or module, such as executes the software and/or module that the relevant subscription data that sensor unit 210 detects is changed into the information that processor 140 is capable of handling.The data of the detection of storage sensor unit 210 are also used to, after to be sampled, processor 230 are sent to, so that the data conversion that processor 230 detects sensor unit 210 is at manageable second signed data of terminal.
Writing pencil 200 further includes the power supply 250 powered to all parts.
In a specific example, for user using writing pencil 200 when the touch panel 111 of terminal 100 inputs handwritten signature, writing pencil 200 detects the information such as acceleration, magnetic field strength, the magnetic field strength of writing pencil 200 by acceleration transducer 211, magnetic field strength transducer 212, angular-rate sensor 213.By 214 user of pressure sensor to the pressure information of writing pencil 200.
The information such as the acceleration of writing pencil 200, magnetic field strength, magnetic field strength are converted to the motion track information of writing pencil 200 by processor 230 by writing pencil 200.The motion track information of writing pencil 200 and user are the second signed data to the pressure information of writing pencil 200.Writing pencil 200 is also extracted the motion track information of writing pencil 200 of synchronization, the acceleration of writing pencil 200, writing pencil 200 by the compression area and/or pressed shape information of user's pressure and user by processor 230 to the pressure information of writing pencil 200, it is packaged into the data packet for carrying corresponding time information, terminal 100 is sent to by communication unit 220.
It should be noted that writing pencil 200 receives the control information in sampling time and sample frequency that terminal 100 is sent by communication unit 220, guarantee the constantly correspondence of the first signed data and the second signed data. Such as, the sampling time of first contact point of writing pencil 200 and the touch panel 111 of terminal is 0ms, terminal 100 makes also be 0ms the sampling time of writing pencil 200 at this time by sending control information, and the sample frequency for controlling writing pencil 200 and terminal 100 is 0.2ms/ times.It can be understood that, in the case where the sampling time and sampling frequency synchronization of terminal 100 and writing pencil 200, for attacker, while imitating user handwriting and imitate pressure of the hand-held writing pencil of user to touch panel, the hand motion for imitating user again and user are very difficult to information such as the pressure of writing pencil.
Therefore, pass through the above-mentioned Signature Authentication System of application, terminal and writing pencil, signature template data is increased, sampling time and the sampling frequency synchronization of writing pencil and terminal are controlled, during user is signed using writing pencil, more user's signature characteristics are extracted by writing pencil, comparison matching, so that attacker will also imitate the hand motion of user while imitating user handwriting, increase the difficulty that attacker imitates signed data, the safety of Signature Authentication System is greatly improved in pole.
Correspondingly, the coordinate system of Signature Authentication System provided in an embodiment of the present invention and signature signal, reference can be made to Fig. 4.
As shown in figure 4, user hand, which holds writing pencil, inputs handwritten signature in touch panel.The position that writing pencil is contacted with touch panel can be described as contact point.Touch panel detects the orientation of contact point, and shows the contact point by the display panel integrated with touch panel.For example, display panel was originally shown as white, after detecting contact point, which is shown as black.
User drives writing pencil to move in touch panel, and writing pencil and having point of contact for touch panel form the signature image of user.As " Xiao Wang " is the handwritten signature image of user in Fig. 4.
Wherein, it when the hand-held writing pencil of user is started to write, has point of contact with touch panel, contact point as shown in Figure 4.It is writing between different strokes or different words, user can lift writing pencil, and writing pencil is moved to next contact point discontinuous therewith from a upper contact point with exterior domain in touch panel.When holding writing pencil from user and starting writing, writing pencil can streak one section of motion profile in touch panel with exterior domain, as shown in Figure 4.
Therefore, the point (contact point) that writing pencil can be started to write is set as the first signature character point, writing pencil Corresponding point (point other than contact point) of starting writing is set as the second signature character point.
During user inputs handwritten signature, the touch orientation for the contact point that touch panel will test is converted into the coordinate information of contact point.Touch panel is integrated with pressure sensor, for detecting the pressure information for the writing pencil being subject at contact point.Meanwhile writing pencil integrates related sensor to detect the motion track information of writing pencil and user to the pressure information of writing pencil.If writing pencil obtains the motion track information of writing pencil by acceleration transducer, magnetic field strength transducer, angular-rate sensor, user is detected to the pressure information of writing pencil by pressure sensor.
Therefore, the coordinate information and writing pencil of the contact point for the pressure sensor detection that can be integrated by touch panel and thereon are set as the first signed data to the pressure information of touch panel, and the motion track information for the writing pencil that writing pencil is detected by related sensor and user are set as the second signed data to the pressure information of writing pencil.
Therefore the corresponding data of the first signature character point can include: writing pencil is to the pressure information of touch panel, the coordinate information of the writing pencil tip of the brushstyle of a writing or painting and user to the pressure information of writing pencil at the coordinate information of contact point, contact point.It is understood that if in the same coordinate system, the coordinate information of contact point and the coordinate information of the writing pencil tip of the brushstyle of a writing or painting be it is identical, one can be taken.The corresponding data of second signature character point can include: the pressure information of the coordinate information of the writing pencil tip of the brushstyle of a writing or painting and user to writing pencil.Specifically, when writing pencil is started writing, touch panel and pressure sensor integrated thereon can't detect the relevant information of contact point.In the period for assuming time T1 to time T2, writing pencil is started writing, then the first signed data without detection in the period.
In a possible example, o in the coordinate system such as Fig. 4 of touch panel1x1y1z1It is shown, o1x1y1z1X-axis, the y-axis plane where touch panel of coordinate system, z-axis are vertical with plane where touch panel.Show in the coordinate system such as Fig. 4 of writing pencil, o2x2y2z2The z-axis of coordinate system is straight line where writing pencil, and x-axis, y-axis are in the plane vertical with writing pencil.
It should be noted that when touch panel detects contact point, in o1x1y1z1Coordinate information is recorded in coordinate system.But consider that user inputs signature position every time and there may be difference with respect to origin.Therefore, the processor of terminal can pre-process the coordinate information of received contact point, by coordinate system o1x1y1z1In number According to transforming in new coordinate system, new coordinate system needs all to have referential to the handwritten signature image that user inputs every time.For example, new coordinate system can be using the center of user's handwritten signature as origin, two middle separated times of signature are x-axis and y-axis." middle separated time " of signature refers to two line of symmetries of signature image.It specifically, can be by o1x1y1z1Y-coordinate average value is asked to the contact point of identical x coordinate in coordinate system, obtains the equalization point under the x coordinate, a middle separated time of signature image is acquired according to the equalization point under identical x coordinates all in contact point.Another middle separated time process signature central point is simultaneously vertical with a middle separated time.
It is understood that the signature image that user inputs every time, for the central point and middle separated time of relative image, there are stationarity, have comparability.Therefore, equally to the data in signature template, the corresponding conversion process of such as above-mentioned new coordinate system is carried out.
Touch panel is in coordinate system o1x1y1z1The coordinate of middle detection contact point.It is understood that the z-axis coordinate of contact point is 0 in touch panel.Therefore (a1, b1,0), which can be used, indicates the coordinate of contact point.Writing pencil is in coordinate system o2x2y2z2The motion profile of middle detection writing pencil, the motion profile of writing pencil can be indicated by the motion profile of the writing pencil tip of the brushstyle of a writing or painting.Wherein, the coordinate of the writing pencil tip of the brushstyle of a writing or painting can be (a2, b2, c).
It should be noted that when writing pencil is started to write, when the writing pencil tip of the brushstyle of a writing or painting and touch panel have point of contact, if the coordinate at contact point should be identical with writing pencil tip of the brushstyle of a writing or painting coordinate in the same coordinate system.When actually detected, the same contact point or its corresponding writing pencil tip of the brushstyle of a writing or painting are in o1x1y1z1And o2x2y2z2Coordinate in two coordinate systems may be different.
It can be by coordinate transform by o2x2y2z2Coordinate information in coordinate system is transformed into coordinate system o1x1y1z1In, specifically, the information such as the same contact point or its coordinate relationship of the corresponding writing pencil tip of the brushstyle of a writing or painting in two coordinate systems can be used in coordinate transform, analyze the positional relationship of two coordinate systems, are coordinately transformed to one of coordinate system.
Further, the data in signature character point may include multiple, and by taking contact point is S1 as an example, such as S1 can be first contact point of writing pencil and touch panel.At S1 corresponding signature character data E include: the coordinate (a1, b1,0) of contact point, writing pencil to the pressure P1 of touch panel, the coordinate (a2, b2, c) of writing pencil, user to the pressure P2 of writing pencil.Correspondingly, the corresponding signature character data e included in signature template school bag of signature character point S1 are as follows: the coordinate (m1, n1,0) of contact point, writing pencil are to touch surface The pressure D1 of plate, the coordinate (m2, n2, q) of writing pencil, user are to the pressure D2 of writing pencil.
Then the matching rate of data E and data e includes the average value or weighted average of four groups of Data Matching rates of (a1, b1,0) and (m1, n1,0), P1 and D1, (a2, b2, c) and (m2, n2, q), P2 and D2.Wherein, the matching rate of the coordinate of two points can be acquired by the matching rate of two numerical value of the coordinate away from initial point distance, can also be obtained by asking matching rate to be weighted averaging again corresponding coordinate numerical value.
In addition, the data of signature character point can comprise more than one, then the matching rate of all signature character points and signature template data can be by the matching rate of each characteristic point corresponding data, then is averaging or is weighted and averaged to the corresponding matching rate of all signature character points and obtain.Wherein, weight values can be set according to actual needs.
In addition, the coordinate for the contact point that can collect the motion profile for the writing pencil tip of the brushstyle of a writing or painting that writing pencil collects and touch panel, carries out unified coordinate system transformation, and project to the motion profile of the transformed writing pencil tip of the brushstyle of a writing or painting.The data of the characteristic point of motion profile after extracting projection, the data as signature character point.For details, reference can be made to following descriptions:
In one example, by the coordinate system o of writing pencil2x2y2z2Be converted to the coordinate system o of touch panel1x1y1z1It afterwards, can be by the writing pencil tip of the brushstyle of a writing or painting in coordinate system o2x2y2z2In motion trace data convert in coordinate system o1x1y1z1In motion trace data.It is located at o1x1y1z1In coordinate system, x/y plane where touch panel is the first plane, if the curve that contact point forms in signature image is first motion profile of the writing pencil tip of the brushstyle of a writing or painting in the first plane.By (three-dimensional) motion profile plane projection where touch panel of the writing pencil tip of the brushstyle of a writing or painting after conversion, the part being overlapped after projection with the first motion profile is removed, obtains the writing pencil tip of the brushstyle of a writing or painting in the second motion profile of the first plane.
Then, above-mentioned first signature character point is the characteristic point extracted from the first motion profile of writing pencil.At this point, the expression of the two-dimensional coordinate in the first plane can be used in the coordinate information of the first signature character point.It is understood that the second new signature character point can be extracted from the second motion profile of writing pencil if the motion profile of writing pencil projected in the first plane.For example, the second new signature character point can be the point that the corresponding every section of discontinuous curve mean curvature of the second motion profile changes greatly.Therefore the new corresponding data of the second signature character point are this o'clock in the two-dimensional coordinate of the first plane and the corresponding user couple of the point The pressure information of writing pencil, the acceleration of the writing pencil tip of the brushstyle of a writing or painting and writing pencil are by data such as the compression area of user's pressure and pressed shapes.
It is understood that after reunification by two coordinate systems, the coordinate of the first signature character point will be overlapped with the coordinate of the second new signature character point.
In another example, by the coordinate system o of writing pencil2x2y2z2Be converted to the coordinate system o of touch panel1x1y1z1It afterwards, can be by the writing pencil tip of the brushstyle of a writing or painting in coordinate system o2x2y2z2In motion trace data convert in coordinate system o1x1y1z1In motion trace data.It is located at o1x1y1z1In coordinate system, x/y plane where touch panel is the first plane, if the curve that contact point forms in signature image is first motion profile of the writing pencil tip of the brushstyle of a writing or painting in the first plane.If two planes vertical with the first plane are the second plane and third plane.Wherein, the second plane and third plane are mutually perpendicular to, and the second plane and third plane and the first plane are total to origin and totally one reference axis.(three-dimensional) motion profile of the writing pencil tip of the brushstyle of a writing or painting after conversion is projected respectively in the first plane, the second plane and third plane, the part being overlapped after projection with the first motion profile is removed, obtains the writing pencil tip of the brushstyle of a writing or painting in the second motion profile of three planes.
Then, above-mentioned first signature character point is the characteristic point extracted from the first motion profile of writing pencil.At this point, the expression of the two-dimensional coordinate in the first plane can be used in the coordinate information of the first signature character point.Such as, the corresponding data of the first signature character point include: the contact point in the coordinate (m1, n1) of the first plane, writing pencil to the pressure D1 of touch panel, user to the pressure D2 of writing pencil.It may also include the data such as the distance T1 of the acceleration d1 of the writing pencil tip of the brushstyle of a writing or painting, the compression area S1 of writing pencil, writing pencil pressurized zone away from the writing pencil tip of the brushstyle of a writing or painting.
It is understood that the second new signature character point can be extracted from the second motion profile of writing pencil if the motion profile of writing pencil projected in three planes.For example, the second new signature character point can be the point that the corresponding every section of discontinuous curve mean curvature of the second motion profile changes greatly.Therefore the new corresponding data of the second signature character point be two-dimensional coordinate of this o'clock in the first plane, the two-dimensional coordinate in the second plane or in the two-dimensional coordinate of third plane and the corresponding user of the point to the pressure information of writing pencil, the acceleration of the writing pencil tip of the brushstyle of a writing or painting and writing pencil by data such as the compression area of user's pressure and pressed shapes.
Such as, the new corresponding data of the second signature character point include: coordinate (m2 of this feature o'clock in the first plane, n2) or this feature o'clock the second plane coordinate (m3, q1) or this feature o'clock in the coordinate (n3, q2) of the second plane, writing pencil to the pressure D2 of touch panel, user to the pressure D4 of writing pencil.It may also include the data such as the distance T2 of the acceleration d2 of the writing pencil tip of the brushstyle of a writing or painting, the compression area S2 of writing pencil, writing pencil pressurized zone away from the writing pencil tip of the brushstyle of a writing or painting.Wherein, the characteristic of the subpoint in Different Plane can be extracted comparison respectively.
Specifically, such as using the unified transformation of coordinate system, to the signature authentication comparison scheme of writing pencil motion profile projection, then when prestoring signature template data, equally the signature template data of user's pre-input of detection is accordingly converted, and lifts corresponding signature character point and signature character data save as signature template data.
The embodiment of the present invention can also convert two coordinate systems of the touch panel of writing pencil and terminal, and the motion profile of writing pencil is projected in the plane where touch panel, it avoids in original two coordinate systems, it may coordinate data of the corresponding same characteristic point in two coordinate systems the case where matching comparison.The embodiment of the present invention also projects the motion profile of writing pencil in two planes vertical with plane where touch panel, and three-dimensional coordinate comparison is simplified to the mode of two-dimensional coordinate comparison, simplifies and compares matched complexity to signed data.It should be noted that Fig. 4 is only a kind of more intuitive schematic form of Signature Authentication System, it is not used as any restriction to the embodiment of the present invention..
Below with reference to Fig. 5, the signature authentication method that embodiment that the present invention will be described in detail provides, Fig. 5 is a kind of signature authentication method signaling interaction diagram provided in an embodiment of the present invention, and subject of implementation is terminal in embodiments of the present invention.As shown in figure 5, the embodiment specifically includes the following steps:
Step S101, the touch panel of terminal detect the handwritten signature that user is inputted by writing pencil.
Step S102, terminal sends control information to writing pencil, synchronous with terminal holding with sample frequency with the sampling time for controlling writing pencil.
Terminal sends control information to writing pencil by communication unit 1.
The sampling time of terminal and writing pencil is synchronous with terminal holding with sample frequency, so that attacker While imitating user handwriting, the hand motion of user is also imitated, increases the difficulty that attacker imitates signed data, the safety of Signature Authentication System is greatly improved in pole.
It should be noted that user handwriting here refers to the image information of user's signature, specifically, person's handwriting can refer to the coordinate information of each point in signature image.In addition, person's handwriting may also include at each point in signature image writing pencil to the pressure information of touch panel.Wherein, each pair of point in signature image answers a contact point of writing pencil and touch panel.
It should be noted that user's hand motion here refers to that user is inputted in signature process using writing pencil, motion track information when user drives writing pencil to move.In addition, hand motion may also include compression area and pressurized zone shape information and pressurized zone range information apart from the writing pencil tip of the brushstyle of a writing or painting etc. of the user to the pressure information of writing pencil, writing pencil by user's pressure.
It can be understood that, the person's handwriting of user and the hand motion of user, represent the characteristic information in the input signature process of user, according to the above-mentioned characteristic information enumerated, it determines that user inputs the authentication result of signature, the safety and reliability of Signature Authentication System can be improved.
Step S103a, touch panel acquire the coordinate information of the contact point of writing pencil and touch panel, pressure information of the writing pencil to touch panel at pressure sensor acquisition contact point.
Wherein, the contact point of writing pencil and touch panel forms signature image.
Step S103b, the motion track information of the sensor unit acquisition writing pencil of writing pencil and user are to the pressure information of writing pencil.
Wherein, the information such as acceleration, magnetic field strength, the magnetic field strength of writing pencil can be detected by acceleration transducer, magnetic field strength transducer, angular-rate sensor.By pressure sensor user to the pressure information of writing pencil.
Further, the also audible range information apart from the writing pencil tip of the brushstyle of a writing or painting of compression area and pressurized zone shape information and pressurized zone for crossing other sensors detection writing pencil by user's pressure.Here other sensors may also comprise pressure sensor etc..
Step S104a, the data conversion that the processor of terminal acquires step S103a is at the first signed data.
The data that the processor of terminal detects touch panel and pressure sensor are a pair of by acquisition time one It answers, i.e. a corresponding contact point coordinate information and writing pencil at the contact point are to the pressure information of touch panel under an acquisition time.
Step S104b, the data conversion that the processor of writing pencil acquires step S103b is at the second signed data.
The information such as the acceleration of writing pencil, magnetic field strength, magnetic field strength are converted to the motion track information of writing pencil by the processor of writing pencil.
The processor of writing pencil is corresponded the motion track information of writing pencil and user to the pressure information of writing pencil by acquisition time, i.e. pressure information of the user to writing pencil at the coordinate information and the acquisition time of a corresponding writing pencil under an acquisition time.
In addition, increaseing accordingly corresponding data under above-mentioned each acquisition time in the case where the data of step S103b acquisition further include other information.
Second signed data is sent to terminal by step S105, writing pencil.
Second signed data is sent to terminal by communication unit 2 by writing pencil.
Step S106, the processor of terminal obtain the data of the first signature character point and the data of the second signature character point according to the first signed data and the second signed data.
Wherein, it signs and corresponds to the first signature character point and the second signature character point.First signature character point includes at least one of the set point of contact point composition, and the second signature character point includes writing pencil in touch panel at least one of the set of point in the motion profile of exterior domain point.
The corresponding data of first signature character point include: the coordinate information of the corresponding contact point of the first signature character point, the writing pencil pressure information of the location information of writing pencil and user to writing pencil to the pressure information of touch panel and when identical as the sampling time of the first signature character point at the corresponding contact point of the first signature character point；Wherein, the location information of writing pencil is obtained by the trace information of writing pencil.
Location information that the corresponding data of second signature character point include: the corresponding writing pencil of the second signature character point and user are to the pressure information of writing pencil.
In addition, in the case where the data of step S103b acquisition further include other information, the corresponding data of the second signature character point further include: it is enterprising in touch panel by writing pencil that writing pencil detected works as user Writing pencil is by the compression area information of user's pressure and the range information of shape information and writing pencil pressurized zone away from the writing pencil tip of the brushstyle of a writing or painting of pressurized zone when row signature.
Specifically, the first signature character point specifically includes: one or more points in first contact point, the last one contact point, discontinuous contact point or the big contact point of Curvature varying.
Specifically, second signature character point specifically includes one or more of following points: in touch panel with the maximum point of the corresponding curve mean curvature of the motion profile of every section of discontinuous writing pencil in exterior domain, or touch panel in the corresponding curve of motion profile of every section of discontinuous writing pencil in exterior domain apart from touch panel apart from farthest point.
In addition, can also the coordinate of contact point that collects of motion profile to the writing pencil tip of the brushstyle of a writing or painting and touch panel, carry out unified coordinate system transformation, and project to the motion profile of the transformed writing pencil tip of the brushstyle of a writing or painting.The characteristic point of motion profile after extracting projection and the data of signature character point, the data as new signature character point.For details, reference can be made to the descriptions in Fig. 4, and this will not be repeated here.
The processor of step S107, terminal compare the data of the first signature character point and the data of the second signature character point with the signature template data prestored, obtain matching rate.
It should be noted that signature template data is that user inputs before handwritten signature authenticates, when pre-input handwritten signature, the related data of the handwritten signature of the pre-input of terminal and writing pencil detection.Terminal will sign template data preservation in memory, input handwritten signature in user and carry out in verification process, call the signature template data stored in memory.
Wherein, before pre-input handwritten signature refers to that user carries out signature authentication, some template datas are saved, when as signature authentication, the foundation of comparison.
Step S108, the processor of terminal is by above-mentioned matching rate and the matching rate threshold comparison prestored, and when above-mentioned matching rate is not less than the matching rate threshold value prestored, instruction display panel shows that user inputs the prompt information that handwritten signature verification passes through.
Wherein, matching rate threshold value can be preset by terminal, directly be called from memory in user's input signature verification.
In addition, the environment that matching rate threshold value can be also actually located at according to terminal, adjusts.At this point, terminal The environment where it can be judged by the network that its communication unit 1 connects.According to the environment where it, the security level of environment where determining terminal, and from the matching rate threshold value called in memory under the security level.Wherein, in the memory of terminal, the list that is stored with the list of the corresponding environment of heterogeneous networks, is stored with the list of the corresponding security level of varying environment and is stored with the corresponding matching rate threshold value of different safety class.Further, the list of heterogeneous networks or the corresponding matching rate threshold value of environment can directly be stored.User can directly pass through network or environment calls its corresponding matching rate threshold values.
Signature authentication method, terminal, writing pencil and system provided in an embodiment of the present invention, terminal and writing pencil detect the related data of signature simultaneously, the related data of signature is matched with the signature template data comparison prestored, and determines whether signature authentication passes through according to matching rate.
The embodiment of the present invention uses writing pencil during the touch panel of terminal inputs handwritten signature in user, more user's signature characteristics are extracted by writing pencil, comparison matching, so that attacker is while imitating user handwriting, also to imitate the hand motion of user, increase the difficulty that attacker imitates user's signature information, the safety of Signature Authentication System is greatly improved in pole.
The embodiment of the present invention can also set different matching rate threshold values, have a good application prospect according to environment where terminal.Meanwhile being proposed using the embodiment of the present invention, user can prestore multiple signature templates in advance, authentification failure rate caused by human factor can be reduced, so that user inputs signature and has higher flexibility.
The embodiment of the present invention can also convert two coordinate systems of the touch panel of writing pencil and terminal, and the motion profile of writing pencil is projected in the plane where touch panel, it avoids in original two coordinate systems, it may coordinate data of the corresponding same characteristic point in two coordinate systems the case where matching comparison.The embodiment of the present invention also projects the motion profile of writing pencil in two planes vertical with plane where touch panel, and three-dimensional coordinate comparison is simplified to the mode of two-dimensional coordinate comparison, simplifies and compares matched complexity to signed data.
Professional should further appreciate that, unit and algorithm steps described in conjunction with the examples disclosed in the embodiments of the present disclosure, it can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly illustrate the interchangeability of hardware and software, in the above description according to function Generally describe each exemplary composition and step.These functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Professional technician can use different methods to achieve the described function each specific application, but such implementation should not be considered as beyond the scope of the present invention.
Those of ordinary skill in the art will appreciate that implementing the method for the above embodiments is that can be completed by program come instruction processing unit, the program can store in computer readable storage medium, the storage medium is non-transitory (English: non-transitory) medium, such as random access memory, read-only memory, flash memory, hard disk, solid state hard disk, tape (English: magnetic tape), floppy disk (English: floppy disk), CD (English: optical disc) and any combination thereof.
It is described above; it is merely preferred embodiments of the present invention, but scope of protection of the present invention is not limited thereto, anyone skilled in the art is in the technical scope disclosed by the present invention; any changes or substitutions that can be easily thought of, should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.

Claims (22)

  1. A kind of signature authentication method, which is characterized in that the described method includes:
    When user is signed on the touch panel of terminal by writing pencil, the terminal detects the first signed data, first signed data include at the coordinate information and the contact point of the contact point of writing pencil and the touch panel writing pencil to the pressure information of the touch panel；And, the terminal receives the second signed data that the writing pencil is sent, and second signed data includes the pressure information of the motion track information of writing pencil when user is signed on the touch panel by writing pencil that the writing pencil detects and the user to the writing pencil；
    First signed data and second signed data are matched into comparison with the signature template data prestored, obtain matching rate；
    When the matching rate is not less than preset matching rate threshold value, the signature authentication passes through.
  2. The method as described in claim 1, which is characterized in that first signed data is synchronous with the sampling time of second signed data and sample frequency holding.
  3. It is method according to claim 1 or 2, which is characterized in that it is described that first signed data and second signed data are matched into comparison with the signature template data prestored, obtain matching rate, comprising:
    The corresponding first signature character point of the signature and the second signature character point, the first signature character point includes at least one of the set of contact point composition point, and the second signature character point includes the writing pencil in the touch panel at least one of the set of point in the motion profile of exterior domain point；
    The first signature character point and the corresponding data of the second signature character point are extracted from first signed data and second signed data；
    The Data Matching of each characteristic point in the first signature character point and the corresponding data of the second signature character point and the signature template data is compared, matching rate is obtained.
  4. Method as claimed in claim 3, it is characterized in that, the corresponding data of the first signature character point include: the coordinate information of the corresponding contact point of the first signature character point, at the corresponding contact point of the first signature character point writing pencil to the pressure information of the touch panel and with first label The location information of writing pencil and user are to the pressure information of the writing pencil when sampling time of name characteristic point is identical；
    Wherein, the location information of the writing pencil is obtained by the motion track information of the writing pencil.
  5. Method as claimed in claim 4, which is characterized in that location information that the corresponding data of the second signature character point include: the corresponding writing pencil of the second signature character point and user are to the pressure information of the writing pencil.
  6. Method as claimed in claim 1 or 5, it is characterized in that, second signed data further include: range information of the acceleration, the writing pencil of the writing pencil by the compression area information of user's pressure and the shape information of pressurized zone and the writing pencil pressurized zone away from the writing pencil tip of the brushstyle of a writing or painting when user is signed on the touch panel by writing pencil of writing pencil detection.
  7. Method as claimed in claim 3, which is characterized in that the first signature character point specifically includes one or more of following points, first contact point, the last one contact point, discontinuous contact point or the big contact point of Curvature varying.
  8. Method as claimed in claim 3, it is characterized in that, the second signature character point specifically includes one or more of following points: in the touch panel with the maximum point of the corresponding curve mean curvature of motion profile of every section of discontinuous writing pencil in exterior domain, or in the touch panel with touch panel described in distance in the corresponding curve of motion profile of every section of discontinuous writing pencil in exterior domain apart from farthest point.
  9. It is method according to claim 1 or 2, which is characterized in that it is described that first signed data and second signed data are matched into comparison with the signature template data prestored, obtain matching rate, comprising:
    The first signature character point is extracted from the contact point；
    By the motion profile of the writing pencil tip of the brushstyle of a writing or painting, the first plane where the touch panel is projected, and obtains the first motion profile of the writing pencil tip of the brushstyle of a writing or painting；The motion profile of the writing pencil tip of the brushstyle of a writing or painting is projected in the second plane vertical with first plane, third plane, obtains the second motion profile and third motion profile of the writing pencil tip of the brushstyle of a writing or painting, second plane is vertical with the third plane；
    It is moved from least one of first motion profile, the second motion profile and third motion profile The second signature character point is extracted in track；
    The first signature character point and the corresponding data of the second signature character point are extracted from first signed data and second signed data；
    The Data Matching of each characteristic point in the first signature character point and the corresponding data of the second signature character point and the signature template data is compared, matching rate is obtained.
  10. The method as described in claim 1, which is characterized in that the environment where the terminal presets the matching rate threshold value.
  11. A kind of signature authentication method, which is characterized in that the described method includes:
    When user is signed on the touch panel of terminal by writing pencil, the writing pencil detects the second signed data, and motion track information that second signed data includes writing pencil and the user are to the pressure information of the writing pencil；
    Second signed data is sent to terminal by the writing pencil, so that the terminal determines whether the signature authentication passes through according to the first signed data that second signed data and the terminal detect, first signed data include at the coordinate information and the contact point of the contact point of writing pencil and the touch panel writing pencil to the pressure information of the touch panel.
  12. Method as claimed in claim 11, it is characterized in that, second signed data further include: range information of the acceleration, the writing pencil of the writing pencil by the compression area information of user's pressure and the shape information of pressurized zone and the writing pencil pressurized zone away from the writing pencil tip of the brushstyle of a writing or painting when user is signed on the touch panel by writing pencil of writing pencil detection.
  13. Method as described in claim 11 or 12, which is characterized in that first signed data is synchronous with the sampling time of second signed data and sample frequency holding.
  14. A kind of terminal, which is characterized in that the terminal includes: touch panel, display panel, sensor, processor, memory, communication unit；
    The touch panel, the signature inputted for receiving user by writing pencil；
    The display panel, for showing the image of the signature；
    The touch panel is also used to detect the coordinate information of the contact point of the writing pencil and the touch panel；
    The sensor, for detecting at the contact point writing pencil to the pressure information of the touch panel；Writing pencil forms the first signed data to the pressure information of the touch panel at the coordinate information of the contact point and the contact point；
    The communication unit, it is communicated to connect for being established with the writing pencil, the second signed data that the writing pencil is sent is received, second signed data includes the pressure information of the motion track information of writing pencil when user is signed on the touch panel by writing pencil that the writing pencil detects and the user to the writing pencil；
    The memory, for storing preset matching rate threshold value；
    The processor obtains matching rate for first signed data and second signed data to be matched comparison with the signature template data prestored；When the matching rate is not less than the preset matching rate threshold value, the prompt information that the display panel shows that the signature authentication passes through is indicated；
    The display panel is also used to show the prompt information that the signature authentication passes through.
  15. Terminal as claimed in claim 14, it is characterized in that, the processor is also used to send to the writing pencil to the sampling time of the writing pencil and the control information of sample frequency, synchronous with the sampling time of second signed data and sample frequency holding to control first signed data.
  16. Terminal as described in claims 14 or 15, it is characterized in that, the corresponding first signature character point of the signature and the second signature character point, the first signature character point includes at least one of the set of contact point composition point, and the second signature character point includes the writing pencil in the touch panel at least one of the set of point in the motion profile of exterior domain point；The processor, specifically for extracting the first signature character point and the corresponding data of the second signature character point from first signed data and second signed data；The Data Matching of each characteristic point in the first signature character point and the corresponding data of the second signature character point and the signature template data is compared, matching rate is obtained.
  17. Terminal as described in claims 14 or 15, which is characterized in that the processor, specifically For extracting the first signature character point from the contact point；By the motion profile of the writing pencil tip of the brushstyle of a writing or painting, the first plane where the touch panel is projected, and obtains the first motion profile of the writing pencil tip of the brushstyle of a writing or painting；The motion profile of the writing pencil tip of the brushstyle of a writing or painting is projected in the second plane vertical with first plane, third plane, obtains the second motion profile and third motion profile of the writing pencil tip of the brushstyle of a writing or painting, second plane is vertical with the third plane；The second signature character point is extracted from least one motion profile in first motion profile, the second motion profile and third motion profile；The first signature character point and the corresponding data of the second signature character point are extracted from first signed data and second signed data；The Data Matching of each characteristic point in the first signature character point and the corresponding data of the second signature character point and the signature template data is compared, matching rate is obtained.
  18. Terminal as claimed in claim 14, which is characterized in that the processor is also used to determine that the environment where the terminal, the environment where the terminal preset the matching rate threshold value according to the network that the communication unit connects.
  19. A kind of writing pencil, which is characterized in that the writing pencil includes: sensor unit, processor, communication unit；
    The sensor unit, the motion track information and the user for detecting the writing pencil when user is signed on the touch panel of terminal by writing pencil are to the pressure information of the writing pencil；
    The processor for the motion track information of the writing pencil and the user to be converted into the second signed data that the terminal is capable of handling to the pressure information of the writing pencil, and indicates that the communication unit is sent to terminal；
    The communication unit communicates to connect for establishing with the terminal, and second signed data is sent to the terminal.
  20. Writing pencil as claimed in claim 19, it is characterized in that, the sensor unit, it is also used to detect the range information of the acceleration, the writing pencil of the writing pencil by the compression area information of user's pressure and the shape information of pressurized zone and the writing pencil pressurized zone away from the writing pencil tip of the brushstyle of a writing or painting when user is signed on the touch panel of terminal by writing pencil.
  21. Writing pencil as described in claim 19 or 20, it is characterized in that, the communication unit, it is also used to receive that the terminal sends to the sampling time of the sensor unit and the control information of sample frequency, it is synchronous with the sampling time of second signed data and sample frequency holding to control first signed data.
  22. A kind of Signature Authentication System, which is characterized in that including writing pencil described in terminal described in the claims 14-18 and the claims 19-21.
CN201680028530.4A 2016-08-31 2016-08-31 Signature authentication method, terminal, handwriting pen and system Active CN108139856B (en)

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