Abstract: A method and apparatus for performing motion recognition using motion sensor fusion and an associated computer program product are provided, where the method is applied to an electronic device. The method includes the steps of: utilizing a plurality of motion sensors of the electronic device to obtain sensor data respectively corresponding to the plurality of motion sensors, the sensor data measured at a device coordinate system of the electronic device, wherein the plurality of motion sensors includes inertial motion sensors; and performing sensor fusion according to the sensor data by converting at least one portion of the sensor data and derivatives of the sensor data into converted data based on a global coordinate system of a user of the electronic device, to perform motion recognition based on the global coordinate system, in order to recognize the user's motion.

Abstract: An optimal recognition for handwritten input based on receiving a touch input from a user may be selected by applying both a delayed stroke recognizer as well as an overlapping recognizer to the handwritten input. A score may be generated for both the delayed stroke recognition as well as the overlapping recognition and the recognition corresponding to the highest score may be presented as the overall recognition.

Abstract: A fingerprint sensing device includes a sensing circuit configured to extract sensing data from nodes included in each of sampling regions of a sensor array. The fingerprint sensing device also includes a control circuit configured to calculate a number of the nodes based on the extracted sensing data to produce sensing data distributions for each of the sampling regions and compare the sensing data distributions with reference distributions, configured to determine that the sampling regions from which the sensing data distributions corresponding to the reference distributions are extracted are effective contact regions, and configured to generate fingerprint information from the sensor array when the number of effective contact regions is greater than or equal to a threshold.

Abstract: A hypersphere-based multivariable public key signature/verification system includes signature and verification modules, wherein the signature module comprises a processor, an affine transformation inversion part I, a trap door part and an affine transformation inversion part II. Corresponding operations are sequentially executed on a message, one or more groups of solutions are produced after the processing of the trapdoor part, a group of solutions are randomly selected, then a signature is continuously produced by the various parts, and finally the signature, together with the message, is transmitted to the processor. The verification module comprises a processor and a public key transformation part, wherein the processor transmits a signature to the public key transformation part to execute an operation, and then judges whether the obtained data is equal to a message in a memory or not: if so, the signature is valid, otherwise the signature is invalid.

Abstract: A method and apparatus are provided for electronically authenticating a handwritten signature of a user, entered on a writing surface via a writing instrument. The method includes acquiring, by the writing surface, at least one instant during the entering of the signature, of at least one piece of data representing the altitude z of the writing instrument relative to the writing surface, in an area of proximity to the writing surface; and authenticating the entered handwritten signature by taking account of at least the altitude z.

Abstract: A method for confirming identity of a user of a mobile electronic device, the method including: receiving touch data from a touch-screen of the mobile electronic device; receiving acceleration data from an accelerometer of the mobile electronic device; correlating between the touch data and the acceleration data; based on the correlating, generating a user-specific trait indicative of said user. The method further includes storing a reference value of the user-specific trait, indicative of said user; in a subsequent usage session of the mobile electronic device, generating a current value of the user-specific trait correlating between touch data and acceleration data; and based on a comparison between the current value of the user-specific trait and the reference value of the user-specific trait, determining whether or not a current user of the mobile electronic device is an authorized user of the mobile electronic device.

Abstract: Handwriting verification methods and related computer systems, and handwriting-based user authentication methods and related computer systems are disclosed. A handwriting verification method comprises obtaining a handwriting test sample containing a plurality of available parameters, extracting geometric parameters, deriving geometric features comprising an x-position value and a y-position value for each of a plurality of feature points in the test sample, performing feature matching between geometric features of the test sample and a reference sample, determining a handwriting verification result based at least in part on the feature matching, and outputting the handwriting verification result. The geometric features may further comprise values derived from the geometric parameters, such as direction and curvature values. The handwriting verification result can be further based on a count of unlinked feature points.

Abstract: A computer-implemented method, system and/or program product update voice prints over time. A receiving computer receives an initial voice print. A determining period of time is calculated for that initial voice print. This determining period of time is a length of time during which an expected degree of change in subsequent voice prints, in comparison to the initial voice print and according to a speaker's subsequent age, is predicted to occur. A new voice print is received after the determining period of time has passed, and the new voice print is compared with the initial voice print. In response to a change to the new voice print falling within the expected degree of change in comparison to the initial voice print, a voice print store is updated with the new voice print.

Abstract: The identity of an end-user operating a computer is confirmed by analyzing user reactions to aberrations in output. More specifically, an aberration is caused in output that the computer provides to an output device, and the end-user's response to the aberration is received. An end-user characteristic is extracted from the response and compared to stored characteristic responses to find a match. A match is indicative of the identity of the computer user. It can also be checked whether, after causing an aberration in output the end-user responded differently to the output than if the output did not have the aberration. The lack of a different response can be interpreted as indicative that the end-user is a bot.

Abstract: A method for confirming identity of a user of a mobile electronic device, the method including: receiving touch data from a touch-screen of the mobile electronic device; receiving acceleration data from an accelerometer of the mobile electronic device; correlating between the touch data and the acceleration data; based on the correlating, generating a user-specific trait indicative of said user. The method further includes storing a reference value of the user-specific trait, indicative of said user; in a subsequent usage session of the mobile electronic device, generating a current value of the user-specific trait correlating between touch data and acceleration data; and based on a comparison between the current value of the user-specific trait and the reference value of the user-specific trait, determining whether or not a current user of the mobile electronic device is an authorized user of the mobile electronic device.

Abstract: The present disclosure provides methods, reagents, and apparatus for authenticating and identifying products. Methods of the disclosure are easy to implement but difficult to replicate, simulate, alter, transpose, or tamper with. In some embodiments, the present disclosure relates to a method of authenticating products using a product authentication code defined by a frequency array of a population of entities, and an item identifier defined by the specific manifestation of the product authentication code.

Abstract: Handwriting verification methods and related computer systems, and handwriting-based user authentication methods and related computer systems are disclosed. A handwriting verification method comprises obtaining a handwriting test sample containing a plurality of available parameters, extracting geometric parameters, deriving geometric features comprising an x-position value and a y-position value for each of a plurality of feature points in the test sample, performing feature matching between geometric features of the test sample and a reference sample, determining a handwriting verification result based at least in part on the feature matching, and outputting the handwriting verification result. The geometric features may further comprise values derived from the geometric parameters, such as direction and curvature values. The handwriting verification result can be further based on a count of unlinked feature points.

Abstract: What is disclosed is a system and method which reconstructs an N-pixel image of a scene such that Q pixel locations associated with identified regions of interest in a scene have a higher image quality when rendered relative to other pixels in the image. Acquisition and adaptive-quality compression are performed simultaneously by semi-synchronously or asynchronously temporally modulating an ordered set of sampling functions used to spatially modulate a pattern of light. The teachings hereof improve compression efficiency of a compressed sensing framework while improving encoding efficiency with respect to traditional compressed sensing techniques.

Abstract: A server determines a plurality of faceprints representing a plurality of users to be recognized at a client device. Each faceprint contains a number of reference images for a given user that are used to recognize facial images of the user detecting in media captured at the client device. The faceprints delivered to the client device are determined for the client device based on the users likely to be detected in images captured at the client device. The reference images with a given faceprint delivered to the client device are selected by the server based on their recognition value in identifying the users likely to be detected in images captured at the client device.

Abstract: A method and device for registering a handwritten personal signature and for judging its authenticity by comparison with previously registered measured values and data derived therefrom. Signature data is acquired by registering a signature handwritten on a surface by a three-dimensional inertial sensing system having rate-of-rotation sensors and linear acceleration sensors. The data is subjected to a subsequent procedure of recognition or verification or comparison with other signatures. Hence not only tracking is performed with reference to the tip of a writing implement, but the dynamics of the signature are registered and evaluated by numerical calculation and adopted as the basis for the subsequent comparison, effectively ruling out the possibility of fraudulent duplication or tracing-over of a signature by an unauthorized third party. The dynamics i.e. acceleration and deceleration phenomena and rates of rotation as the signature are executed and effectively registered.

Abstract: A computer program and apparatus function to extract objects from a video by identifying regions to be tracked, tracking the regions across several frames, calculating motions of the regions, and identifying new regions to be tracked. Regions of a selected frame of the video that are appropriate for tracking are selected. Tracking of the identified regions is then performed across frames subsequent to the selected frame of the video. Motions of the identified regions are calculated, and new regions for tracking are identified.

Abstract: A method and system for verifying the continued presence of the same player at a gaming machine is provided. The system comprises a device for continuously obtaining verification data samples, wherein each verification data sample relates to one or more physical features of a first player. A subsequently obtained verification data sample is analyzed to determine whether it is substantially similar to a previously obtained verification data sample. If the subsequent verification data sample is substantially similar to the previously obtained verification data sample, then the system determines that the first player continues to be the same player present at the gaming machine.

Abstract: The method aims at identifying a fake element (F1) reproducing a fake skin print positioned on the detection surface (13) of an optical device for detecting skin prints such as fingerprints. The method provides for sending (14) towards the abovementioned detection surface (13) an illumination beam (14) to be back-scattered and propagate through the fake element (F1) bearing the fake print. The beam in question is a shielded beam including an illuminated region (22) and a shielded region (23). A sensor (16) captures the shielded illumination beam after the back-scattering, generating a signal indicating the dimension (x0, x0?) of the transition region (24) between the illuminated region (22) and the shielded region (23) present in the shielded beam after the back-scattering. The possible presence of a fake element (F1) reproducing a fake skin print is identified when the abovementioned transition region (24) has a dimension larger than a given reference value (x0).

Abstract: A method and system for verifying the continued presence of the same player at a gaming machine is provided. The system comprises a device for continuously obtaining verification data samples, wherein each verification data sample relates to one or more physical features of a first player. A subsequently obtained verification data sample is analyzed to determine whether it is substantially similar to a previously obtained verification data sample. If the subsequent verification data sample is substantially similar to the previously obtained verification data sample, then the system determines that the first player continues to be the same player present at the gaming machine.

Abstract: The present invention provides a system (method and apparatus) for creating photorealistic 3D models of environments and/or objects from a plurality of stereo images obtained from a mobile stereo camera and optional monocular cameras. The cameras may be handheld, mounted on a mobile platform, manipulator or a positioning device. The system automatically detects and tracks features in image sequences and self-references the stereo camera in 6 degrees of freedom by matching the features to a database to track the camera motion, while building the database simultaneously. A motion estimate may be also provided from external sensors and fused with the motion computed from the images. Individual stereo pairs are processed to compute dense 3D data representing the scene and are transformed, using the estimated camera motion, into a common reference and fused together. The resulting 3D data is represented as point clouds, surfaces, or volumes.

Abstract: Methods and systems are provided for analyzing and assessing documents using a writing profile for documents, such as a payment instrument. A method may include providing a document to a computer system. In an embodiment, the method may further include comparing writing in one or more non-signature information fields of the document to at least one forger writing profile representation. In some embodiments, at least one forger writing profile representation may be obtained from at least one non-signature information field of at least one document that includes forged information. In an embodiment, the document may be identified as a document including forged information from an approximate match of at least one forger writing profile representation with writing in the document.

Abstract: A method and device for registering a handwritten personal signature and for judging its authenticity by comparison with previously registered measured values and data derived therefrom. Signature data is acquired by registering a signature handwritten on a surface by a three-dimensional inertial sensing system having rate-of-rotation sensors and linear acceleration sensors. The data is subjected to a subsequent procedure of recognition or verification or comparison with other signatures. Hence not only tracking is performed with reference to the tip of a writing implement, but the dynamics of the signature are registered and evaluated by numerical calculation and adopted as the basis for the subsequent comparison, effectively ruling out the possibility of fraudulent duplication or tracing-over of a signature by an unauthorized third party. The dynamics i.e. acceleration and deceleration phenomena and rates of rotation as the signature are executed and effectively registered.

Abstract: Signature data of a handwritten signature input to a signature authentication device is analyzed to determine whether to register the signature based on the characteristics of the stroke shape of the signature. If the signature registration is denied, a response message for making the signature registerable is displayed according to the way in which the signature is written. At least one of cumulative angle changes in the locus of the signature, fluctuation in the speed at which the signature was written, fluctuation in the size of the characters included in the signature, and fluctuation in the center positions of the characters included in the signature is used as the determination criterion.

Abstract: A method and device for registering a handwritten personal signature and for judging its authenticity by comparison with previously registered measured values and data derived therefrom. Signature data is acquired by registering a signature handwritten on a surface by a three-dimensional inertial sensing system having rate-of-rotation sensors and linear acceleration sensors. The data is subjected to a subsequent procedure of recognition or verification or comparison with other signatures. Hence not only tracking is performed with reference to the tip of a writing implement, but the dynamics of the signature are registered and evaluated by numerical calculation and adopted as the basis for the subsequent comparison, effectively ruling out the possibility of fraudulent duplication or tracing-over of a signature by an unauthorized third party. The dynamics i.e. acceleration and deceleration phenomena and rates of rotation as the signature are executed and effectively registered.

Abstract: Handwriting recognition techniques employing a personalized handwriting recognition engine. The recognition techniques use examples of an individual's previous writing style to help recognize new pen input from that individual. The techniques also employ a shape trainer to select samples of an individual's handwriting that accurately represent the individual's writing style, for use as prototypes to recognize subsequent handwriting from the individual. The techniques also alternately or additionally employ an intelligent combiner to combine the recognition results from the personalized recognition engine and the conventional recognition engine (or engines). The combiner may use a comparative neural network to combine the recognition results from multiple recognition engines. The combiner alternately may use a rule-based system based on prior knowledge of different recognition engines.

Abstract: Provided are an apparatus and method for character recognition that analyze three-dimensional motion of a user using an acceleration sensor and thereby perform character input and character recognition. The apparatus and method easily discern each stroke on the basis of a direction of motion at the beginning portion and end portion of the stroke, and recognize a character using a combination of the strokes, thereby enabling realization of a small-sized motion-based character input system.

Abstract: An apparatus and method for increasing the rate of recognition of spatial writing, the apparatus including an inertia sensor module, a storage module, an operation module, and a recognition module. The inertia sensor module measures acceleration of a spatial writing device. The storage module stores predetermined operation information and parameters for tracing the motion trajectory of spatial writing, and pattern information about the motion trajectory. The operation module calculates a velocity of the spatial writing from the acceleration measured using the operation information and parameters, corrects the calculated motion velocity by limiting positional relationships between predetermined points which correspond to the motion trajectory of the spatial writing, and traces the motion trajectory using the corrected motion velocity.

Abstract: In a method and an arrangement for detecting skinprints, in particular fingerprints, it is provided that at least one strip sensor comprising at least one elongate narrow sensor line detects the structure of the fingertip when the fingertip passes over the strip sensor, that at least one optoelectronic speed sensor continuously determines the finger movement, that the fingertip is moved over at least one optoelectronic speed sensor and the strip sensor, and that the determined finger movement is used to correct an image of the finger structure that has been distorted as a result of non-uniform movement. Preferably, the speed sensor evaluates the Doppler shift of a modulation of the modulated laser light reflected at the moved finger surface.

Abstract: Methods and systems are provided for analyzing and assessing documents using a writing profile for documents, such as a payment instrument. A method may include providing a document to a computer system. In an embodiment, the method may further include comparing writing in information fields of the document to at least one forger writing profile representation. In some embodiments, at least one forger writing profile representation may be obtained from at least one information field of at least one document that includes forged information. In an embodiment, the document may be identified as a document including forged information from an approximate match of at least one forger writing profile representation with writing in the document.

Abstract: Methods and apparatus, including computer program products, for presenting status of digital signatures. A digital document is received that defines a presentation structure and includes a digital signature. The digital document specifies a representation of the digital signature and a location in the presentation structure for the representation of the digital signature. A status is determined for the digital signature. A status representation is associated with the digital signature, where the status representation identifies the status determined for the digital signature. Without altering the representation of the digital signature, at least a portion of the digital document and the status representation of the digital signature are presented in a user interface, where the status representation is presented in the presentation structure at a location that depends upon the location of the digital signature.

Abstract: Every time to-be-verified biometric is input, the apparatus reflects the degree of fluctuation in the to-be-verified biometric information on narrowing down of registered feature information. After to-be-verified biometric information is input through the a biometric information input unit, the to-be-verified sub-feature information obtaining unit extracts two or more items of sub-feature information from the to-be-verified biometric information. Based on the pieces of to-be-verified sub-feature information, the to-be-verified sub-feature information assessing unit assesses an acquisition stability of each item of to-be-verified sub-feature information. According to the acquisition stability assessment, the registered feature information narrowing unit selects one or more pieces of registered feature information to be subjected to comparison/verification, thereby narrowing down the registered feature information.

Abstract: A spatial motion recognition system capable of recognizing motions in three-dimensional space as handwritings on a two-dimensional plane is provided. The system recognizes motions of a system body occurring in space based on position change information of the system body that is detected in a motion detection unit, displays the recognized motion information on a screen, or transmits to an external device the recognized motion information through a transmission/reception unit or a control signal corresponding to the motion information. A control unit produces a virtual handwriting plane having the shortest distances with respect to respective positions in predetermined time intervals based on three-dimensional track information obtained through tracking, and projects the respective positions in the predetermined time intervals onto the virtual handwriting plane to recover the motions in space.

Abstract: A handwriting trajectory recognition system, having a motion detection unit adapted to output electric signals based on changes in acceleration of a body of the system in space. A control unit adapted to detect non-stroke regions intervals where the motions of the system body are temporarily stopped and recover handwritings based on the electric signals is provided.

Abstract: An image distributing system for distributing an image in which a certain objected character is caught, having a camera system capturing images in which a person who is the objected character is caught; a signal transmitter connecting to the camera system; an image database connecting with the signal transmitter and storing a plurality of image data transmitted by the signal transmitter; a character information database for storing character information for identifying the person caught in the image as the objected character; and an image collecting unit, identifying a person caught in the image, data of which is stored in the image database, as the objected character, and collecting image data in which the objected character is caught.

Abstract: In an apparatus for online signature verification, a signature data input unit digitalizes a locus of a user signature and reads the locus as a sequence of points. A first and a second pattern transform unit performs a speed equalization and a velocity transform on the signature sequence and generates a first and a second transformed pattern sequence, respectively. A characteristics extraction unit extracts three characteristics vectors from the signature sequence, the first and the second transformed pattern sequence, respectively, to thereby generate the three characteristics vectors. A difference vector estimation unit generates a difference vector. A determination unit determines whether an input signature and the reference signature are signed by a single person.

Abstract: A digitized writing is recorded in a digitized writing record including at least the position of each point of a writing in coordinates relative to a coordinate of a previous point thereof and time. The digitized writing record may be converted to image format.

Abstract: Methods and apparatus, including computer program products, for presenting status of digital signatures. A digital document is received that defines a presentation structure and includes a digital signature. The digital document specifies a representation of the digital signature and a location in the presentation structure for the representation of the digital signature. A status is determined for the digital signature. A status representation is associated with the digital signature, where the status representation identifies the status determined for the digital signature. Without altering the representation of the digital signature, at least a portion of the digital document and the status representation of the digital signature are presented in a user interface, where the status representation is presented in the presentation structure at a location that depends upon the location of the digital signature.

Abstract: A processing terminal 10 includes a writing implement (ball point pen) 30. The writing implement 30 is provided with a tilt change detecting mechanism for detecting a change in a tilt with respect to a writing implement main body of a lead and a vibration detecting mechanism for detecting the change in the vibration of the vibrated lead at the time of handwriting. The processing terminal 10 produces handwriting motion information based on both of the detected changes in the tilt of the lead and in the vibration. A handwriting identification organization 20 compares handwriting motion information with inherent information stored previously to identify handwriting. Thereby it can achieve high reliability in an authentication system with a simple structure.

Abstract: In an image scanning system which can scan an image in a plurality of scanning modes, and has a memory for storing a correction data file which has correction data for each of the plurality of scan modes, correction data corresponding to a scan mode of a given image scan operation is read out from the memory upon scanning an image, and an image scan is executed using the readout correction data. If correction data corresponding to the scan mode of that image scan operation is not stored in the memory, correction data corresponding to the scan mode is generated, and is stored in the memory.

Abstract: The present invention concerns a device for detecting and representing movements. The device includes a position sensor for detecting the current position of a reference point of the device, a data processor for processing the position data detected by the position sensor and a projector for projecting on a surface an image projection of the detected and processed position data. The data processor takes into account a modification in the current position of the reference point such that the projection image on the surface remains substantially stable concerning location and position.

Abstract: A sweep-type fingerprint sensor module includes a microprocessor and a sweep-type fingerprint sensor, which includes a substrate, and a sensing members array, a speed-detecting unit, and a processing circuit on the substrate. The array is composed of plural fingerprint sensing members. When the finger sweeps across the fingerprint sensor, the array sequentially acquires plural fingerprint fragment images from the finger with a sampling time interval. The speed-detecting unit is composed of first and second plate electrodes. The processing circuit processes and then outputs signals from the array and the speed-detecting unit.

Abstract: A spatial motion recognition system capable of recognizing motions in three-dimensional space as handwritings on a two-dimensional plane is provided. The system recognizes motions of a system body occurring in space based on position change information of the system body that is detected in a motion detection unit, displays the recognized motion information on a screen, or transmits to an external device the recognized motion information through a transmission/reception unit or a control signal corresponding to the motion information. A control unit produces a virtual handwriting plane having the shortest distances with respect to respective positions in predetermined time intervals based on three-dimensional track information obtained through tracking, and projects the respective positions in the predetermined time intervals onto the virtual handwriting plane to recover the motions in space.

Abstract: A handwriting trajectory recognition system, having a motion detection unit adapted to output electric signals based on changes in acceleration of a body of the system in space. A control unit adapted to detect non-stroke regions intervals where the motions of the system body are temporarily stopped and recover handwritings based on the electric signals is provided.

Abstract: An image identification apparatus for identifying an image from a sequence of spatial samples generated in response to a hand drawn representation of the image, the image identification apparatus comprising a segment processor arranged in operation to determine from the spatial samples stroke data representative of strokes performed in drawing the hand drawn representation of the image, a stroke pre-processor which is arranged in operation to generate parameter data from the sequence of spatial samples and the determined stroke data of the hand drawn representation, and an image identifier coupled to the stroke pre-processor which is arranged in operation to identity the image from the parameter data. The image identification apparatus finds application in many fields, including identifying hand drawn images for generating a story board from pre-generated images.

Abstract: A device and method are disclosed for capturing an electronic image signal from the interaction of light with features of, on, or near a media surface. In addition to signature marks, these features can include characters, character strings, symbols, icons, dot pitches, line types, line and character formats, optical densities, color, indentations, texture, and patterns. More specifically, the claimed invention is useful primarily for optically capturing, processing, parameterizing, and identifying hand written signatures, but may also be applied to identification of other surface features such as print, line art, graphics embossments, textures or colors. The signals are captured, processed, sometimes parameterized, and used to make associations with an identifying name. These associations can be given a statistical probability of correctness.

Abstract: An electronic device used to identify loci containing more than one stroke. This electronic device utilizes a ball rotation sensor to detect the position and movement while it is in contact with a surface and an acceleration sensor when the device is not in contact with the surface. Further, this device is able to correct for inaccuracies in the acceleration sensor utilizing data received from the ball rotation sensor. This correction is based on a calculated detection error determined while the ball rotation sensor is active. The correction occurs when the device is again no longer in contact with the surface and again utilizing the acceleration sensor to determine position.

Abstract: A biometric machine method for instantaneous assessment of the fine motor control of a human individual through analysis of that individual's handwriting dynamics in which the dynamic data concerning forces, accelerations, and the like, of a scriber, is collected during the process of cursive writing. The criteria of stability, smoothness and synchronization of the writer's motion are returned by the system as quantifying measures of the neurological function. The method processes behavioral random signals with application of the correlation function analysis to the handwriting dynamic signals. In one embodiment, the system includes an instrumented pen connected to a computer, power supply, and analog-to-digital converter, and with the handwriting samples provided on any writing surface. In a second embodiment, the system comprises an instrumental digital tablet having an active area and non-instrumented scriber with the handwriting samples provided on the active area of the grid.

Abstract: A data input system is provided with an input pen. A sequence of characters are traced with the input pen, and image data on them are read from the image scanner incorporated in the input pen. Each character is recognized on the basis of the image data. If a recognition error occurs during the input processing, a correct character is written with the input pen. A locus of movement is traced on the basis of moving distance data, which is obtained by a moving distance sensor and includes a moving distance and a moving direction. A character represented by the traced locus is recognized.

Abstract: An electronic signature management system includes a graphic tablet digitizer for signaling position coordinates of a stylus being moved to produce a handwritten signature, a clock circuit of the digitizer defining a fixed interval between successive stylus position measurements, a computer processor electrically interfaced with the tablet and programmed for receiving and storing a multiplicity of the coordinates in sequential order as an electronic signature forming a time history of the stylus movement.

Abstract: A processing terminal 10 includes a writing implement (ball point pen) 30. The writing implement 30 is provided with a tilt change detecting mechanism for detecting a change in a tilt with respect to a writing implement main body of a lead and a vibration detecting mechanism for detecting the change in the vibration of the vibrated lead at the time of handwriting. The processing terminal 10 produces handwriting motion information based on both of the detected changes in the tilt of the lead and in the vibration. A handwriting identification organization 20 compares handwriting motion information with inherent information stored previously to identify handwriting. Thereby it can achieve high reliability in an authentication system with a simple structure.