| Patent application number | Description | Published |
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| 20090279694 | PRIVACY-PRESERVING SCALAR PRODUCT CALCULATION SYSTEM, PRIVACY-PRESERVING SCALAR PRODUCT CALCULATION METHOD AND CRYPTOGRAPHIC KEY SHARING SYSTEM - A privacy-preserving scalar product calculation system is provided. A first unit linearly transforms an n-dimensional vector Va into an n-dimensional vector based on a scalar value based on a random number W | 11-12-2009 |
| 20090289760 | Biometric authentication system, authentication client terminal, and biometric authentication method - A biometric authentication system, authentication client terminal, and biometric authentication method are provided to reduce an expected value of the number of inputs of biometric data for authentication, while effectively preventing forgery. In a biometric authentication system, prior probabilities of enrolled users u | 11-26-2009 |
| 20100011423 | User identification system and a method thereof - A service providing system using the biometrics identification without inputting the user ID poses the problem that the consideration of a service is erroneously claimed to the registered user not using the service due to the erroneous identification. According to this invention, the threshold of the value of the degree of similarity for user identification is set strictly for each registered biometrics information of the user in accordance with the declaration of the loss caused by the erroneous identification. | 01-14-2010 |
| 20100106964 | AUTHENTICATION TERMINAL, AUTHENTICATION SERVER, AND AUTHENTICATION SYSTEM - In registration, a feature array x[i] obtained by client is basis-transformed into array X[i], transformed with a transformation filter array K[i] into a template array T[i] to be registered in the client. In authentication, the feature array y[i] is basis-transformed into an array Y[i] after inversely sorting and applied to filter K by computation V[i]=Y[i]K[i]. The server obtains array e[i]=Enc (T[i]), and the client obtains e′[i]=Enc (Σ | 04-29-2010 |
| 20100315201 | BIOMETRICS AUTHENTICATION METHOD AND CLIENT TERMINAL AND AUTHENTICATION SERVER USED FOR BIOMETRICS AUTHENTICATION - In a biometrics authentication system inputting biometric information and outputting a user ID, speedup of 1:N matching on the side of server achieved when cancelable biometrics authentication is realized in which matching is carried out. During registration, similarity of a feature to a dummy feature is searched and the feature is transformed by using a transform parameter corresponding to a nearest neighboring dummy feature. The transformed feature and a group ID are transmitted to the server and the server registers the transformed feature at the group in a DB. During authentication, like the registration process, similarity search of a feature is carried out and the feature is transformed by using transform parameter corresponding to a nearest neighboring dummy feature. The transformed feature and group ID are transmitted to the server. The server executes 1:1 matching between a template a the group in the DB and the transformed feature. | 12-16-2010 |
| 20110099385 | BIOMETRIC AUTHENTICATION METHOD AND COMPUTER SYSTEM - A biometric authentication method for a computer system, the computer system comprising: a computer; and an authentication server, the biometric authentication method including steps of: extracting a first feature from the captured biometric information; generating a template polynomial for enrollment; extracting a second feature from the captured biometric information; generating a template polynomial for authentication; generating a correlation function for calculating a correlation between the template polynomial for authentication and the enrolled template polynomial; calculating a correlation value between the template polynomial for authentication and the enrolled template polynomial by using the generated correlation function, and determining based on the calculated correlation value whether or not the biometric information at the time of authentication coincides with the biometric information enrolled. | 04-28-2011 |
| 20110138187 | SYSTEM AND METHOD OF BIOMETRIC AUTHENTICATION USING MULTIPLE KINDS OF TEMPLATES - In additional enrollment of a template in a biometric authentication system, the template is automatically enrolled on the basis of a plurality of authentication results to assure a user's convenience and security. A post-migration authentication server receives a first template and a second template from a post-migration authentication terminal, performs authentication on the basis of the comparison result between the received first template and the user's preliminarily first enrolled template, and provisionally enrolls the first template and the second template. It repeats the reception, authentication, and provisional enrollment and calculates a match probability from a plurality of comparison results of the provisionally first enrolled templates, determines whether or not to store a second enrolled template on the basis of the match probability, and automatically enrolls the second template in the post-migration authentication server. | 06-09-2011 |
| Patent application number | Description | Published |
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| 20090007257 | SYSTEM, METHOD, SERVER, CLIENT TERMINAL, PROGRAM FOR BIOMETRIC AUTHENTICATION - The present invention provides a biometric authentication system including: a parameter manage server having a user parameter generating portion for generating a user parameter using a user ID transmitted from a client terminal, a master key and a temporary parameter; the client terminal having an input unit by which a user ID provided in advance for a user is input, a biological information sensor which acquires biological information of a user, a feature extracting portion which extracts feature from the biological information acquired by the biological information sensor and a transforming portion which transforms the feature using the user parameter generated by the parameter manage server to generate transformation feature; and an authentication server having a matching portion which matches the transformation feature transmitted from the client terminal against a template stored in advance in the storing portion. | 01-01-2009 |
| 20090070860 | AUTHENTICATION SERVER, CLIENT TERMINAL FOR AUTHENTICATION, BIOMETRICS AUTHENTICATION SYSTEM, BIOMETRICS AUTHENTICATION METHOD, AND PROGRAM FOR BIOMETRICS AUTHENTICATION - A template sharing processing is performed between a first authentication server and a second authentication server. A client terminal generates two parameter differences, one of which is sent to the first authentication server, and the other to the second authentication server. The first authentication server transforms an already-registered template with the received parameter difference to create a temporary template and sends the temporary template to the second authentication server. The second authentication server transforms the received temporary template with the already-received parameter difference to create and register therein a further transformed template. A storage medium stores therein only a single master key for generating a parameter. | 03-12-2009 |
