摘要:
A mobile information terminal including a gripping-feature sample acquisition unit to acquire a gripping-feature sample, one or more environmental sensors outputting an environmental signal, a terminal status detector to acquire the environmental signal and detect a terminal status, a template selection unit to select a user authentication template fitting the detected terminal status, a user authentication unit collating the acquired gripping-feature sample with the selected user authentication template and outputting a user authentication result, a user authenticity level monitor that outputs a sensor power source OFF signal when the user authenticity level exceeds a threshold value and outputs a sensor power source ON signal when the user authenticity level falls below the threshold value, and a power source control unit halting energization to a sensor when acquiring the sensor power source OFF signal, and energizing a sensor when acquiring the sensor power source ON signal.
摘要:
A mobile information terminal includes a sample acquisition unit configured to acquire a sample, a sample transmission unit configured to transmit the sample and a user ID, an other's sample reception unit configured to receive other's samples, a user authentication template learning unit configured to learn a user authentication template and an authentication determination threshold value by using the other's samples and samples of the authentic user, and a template storage unit configured to store the user authentication template and the authentication determination threshold value, and a server includes a sample reception unit configured to receive a sample and a user ID, a clustering unit configured to classify the sample that is received into a feature cluster, a sample storage unit configured to store the sample that is classified, in association with the user ID, a feature cluster extraction unit configured to extract all samples which belong to a feature cluster identical to a feature cluster corresponding to the user ID that is received, and an other's sample transmission unit configured to transmit the samples that are extracted, as other's samples.
摘要:
A mobile information terminal including a gripping-feature sample acquisition unit to acquire a gripping-feature sample, one or more environmental sensors outputting an environmental signal, a terminal status detector to acquire the environmental signal and detect a terminal status, a template selection unit to select a user authentication template fitting the detected terminal status, a user authentication unit collating the acquired gripping-feature sample with the selected user authentication template and outputting a user authentication result, a user authenticity level monitor that outputs a sensor power source OFF signal when the user authenticity level exceeds a threshold value and outputs a sensor power source ON signal when the user authenticity level falls below the threshold value, and a power source control unit halting energization to a sensor when acquiring the sensor power source OFF signal, and energizing a sensor when acquiring the sensor power source ON signal.
摘要:
A portable terminal includes a former-template storage that stores an old authentication template used for authentication in a portable terminal used in the past, as a former template; a sensor-position storage that stores the positions of sensors in the portable terminal currently being used; a sensor-position correcting section that acquires the former template and the positions of the sensors and applies interpolation to the former template according to the positions of the sensors to generate an interpolated template; a gripping-feature sample acquisition section that acquires a gripping feature sample from a sensor array; a template comparison section that compares the interpolated template with the acquired gripping feature sample and calculates an inter-vector distance therebetween; and a template storage that stores the interpolated template as an authentication template when the inter-vector distance between the interpolated template and the acquired gripping feature sample is equal to or shorter than a predetermined value.
摘要:
A mobile information terminal that can acquire an optimum placement area for a controllable object, regardless of variability in user's gripping features among individuals. A pressure sensor array acquires a gripping pressure distribution; a gripping pressure logger records time-series changes in gripping pressure at each pressure sensor forming the pressure sensor array; a gripping pressure change point detection unit includes a gripping pressure change amount calculation section that acquires time-series changes in gripping pressure at each pressure sensor and determines whether the change in gripping pressure per unit time exceeds a predetermined value at any pressure sensor; and a placement area acquisition section specifies, when the change in gripping pressure per unit time exceeds the predetermined value at any pressure sensor, an optimum placement area for a controllable object with reference to a position where the change in gripping pressure per unit time exceeds the predetermined value.
摘要:
A mobile information terminal that can authenticate an authorized user by using behavioral features acquired when the user makes small movements in a limited movable range. The mobile information terminal includes a gripping feature sensor that acquires gripping features; a behavioral feature sample acquisition section that acquires time-series data of gripping features in a fiddling session as samples of behavioral features; a switch that puts the mobile information terminal into either a learning mode or an authentication mode; a template learning section that learns an authentication template by using the samples of behavioral features when in the learning mode; an authentication section that authenticates the user by comparing the samples of behavioral features with the learned authentication template when in the authentication mode; and an unlock section that unlocks all or some of the functions of the mobile information terminal when the authentication succeeds.
摘要:
A gripping-feature learning authentication system preventing impersonation. A mobile information terminal includes a trigger monitor outputting a gripping-feature acquisition signal, a gripping-feature sample acquisition part acquiring a gripping-feature sample, a template learning part learning a user authentication template, a template sending part sending the user authentication template, an authentication request part sending and receiving an authentication request, an authentication data sending part sending a terminal identification number or gripping-feature sample, and a determination result receiver receiving a determination result. A server includes a template receiver receiving a user authentication template, a member template storage storing a user authentication template and member information, an authentication data receiver receiving a terminal identification number and gripping-feature sample, a member authenticator determining probability users corresponding to terminal identification numbers and gripping-feature samples belong to same member group, and a determination result sending part sending a determination result.
摘要:
A mobile information terminal to determine whether a user's operation state is one-handed operation or two-handed operation. The mobile information terminal includes a pressure sensor array that acquires a gripping pressure distribution; a gripping pressure logger that records time-series changes in gripping pressure at each pressure sensor forming the pressure sensor array; a gripping pressure change point detection unit that includes a gripping pressure change amount calculation section that acquires time-series changes in gripping pressure at each pressure sensor and determines whether the amount of change in gripping pressure per unit time exceeds a predetermined value at any pressure sensor; and an operation state determination section that determines the operation state of the user of the mobile information terminal is one-handed operation when the amount of change in gripping pressure per unit time exceeds the predetermined value at any pressure sensor.
摘要:
A mobile information terminal includes a mode acquisition section adapted to acquire the mode of the mobile information terminal; a sample filling section adapted to, when the number of gripping feature samples acquired in a mode is insufficient, fill in lacking gripping feature samples with gripping feature samples acquired in another mode; a gripping-feature sample acquisition section adapted to acquire gripping feature samples; a switch adapted to switch the mobile information terminal between a learning state and an authentication state; a template learning section adapted to learn an authentication template in each mode using the gripping feature samples when the mobile information terminal is in the learning state; an authentication section adapted to compare the learned authentication template with gripping feature samples in each mode to perform authentication; and a locking section adapted to lock some or all of functions of the mobile information terminal when the authentication fails.
摘要:
A mobile information terminal to determine whether a user's operation state is one-handed operation or two-handed operation. The mobile information terminal includes a pressure sensor array that acquires a gripping pressure distribution; a gripping pressure logger that records time-series changes in gripping pressure at each pressure sensor forming the pressure sensor array; a gripping pressure change point detection unit that includes a gripping pressure change amount calculation section that acquires time-series changes in gripping pressure at each pressure sensor and determines whether the amount of change in gripping pressure per unit time exceeds a predetermined value at any pressure sensor; and an operation state determination section that determines the operation state of the user of the mobile information terminal is one-handed operation when the amount of change in gripping pressure per unit time exceeds the predetermined value at any pressure sensor.