Abstract: A control method including: acquiring state data corresponding a current state from a first blockchain network managing a first distributed ledger, wherein parameters relating to a series of transactions executed via a plurality of blockchain networks, a procedure of the transactions corresponding to the current state of the series of transactions, and a condition relating to a state transition in the series of transactions are defined in the first distributed ledger; transmitting an execution instruction for the transactions corresponding to the current state to the blockchain networks included in the plurality of blockchain networks; and determining a state transition destination of the current state of the series of transactions by linking with the first blockchain network, based on the condition defined in the acquired state data, when a result of processing the transmitted execution instruction for the transactions in the blockchain networks of the plurality of blockchain networks is received.

Abstract: An information processing device includes a memory; and a processor coupled to the memory and configured to transmit, to a terminal, a program and a first identifier related to the program, the program being encrypted with a first public key corresponding to a first private key of the terminal, the first identifier being encrypted by using the first public key and a second public key not corresponding to the first private key; and when the terminal receives the first identifier decrypted by the first public key and encrypted by the second public key, register, in a blockchain, transaction information which includes the first identifier decrypted with the second private key corresponding to the second public key.

Abstract: An information processing device includes a memory; and a processor coupled to the memory and configured to transmit, to a terminal, a program and a first identifier related to the program, the program being encrypted with a first public key corresponding to a first private key of the terminal, the first identifier being encrypted by using the first public key and a second public key not corresponding to the first private key; and when the terminal receives the first identifier decrypted by the first public key and encrypted by the second public key, register, in a blockchain, transaction information which includes the first identifier decrypted with the second private key corresponding to the second public key.

Abstract: An information processing apparatus includes: a memory; and a processor coupled to the memory and configured to: acquire a price of a first transaction target in a history of transactions using a first virtual currency and a price of a second transaction target in a history of transactions using a second virtual currency; and calculate an exchange ratio between the first virtual currency and the second virtual currency based on the price of the first transaction target and the price of the second transaction target.

Abstract: An information processing apparatus includes: a memory; and a processor coupled to the memory and configured to: generate, in response to reception of a token issue request including transaction information from a user, a permission rule for determining a permission range of transaction contents based on the transaction information; transmit a token corresponding to the permission rule to a web application which processes a proxy transaction for the user, and determine, in response to reception of a signature issue request based on a transaction request by the user including the token from the web application, whether or not to issue a digital signature corresponding to the signature issue request, based on whether or not the transaction contents included in the transaction request are within the permission range determined by the permission rule corresponding to the token included in the signature issue request.

Abstract: A fingerprint image obtaining unit 1 obtains a fingerprint image of multiple fingers. A vein image obtaining unit 3 obtains a palm vein image. An authentication information DB 6 stores reference vein characteristic information, and a reference direction of a predetermined finger in a reference palm vein image for which the reference vein characteristic information is obtained. A reference obtaining unit 20 detects a longitudinal direction of a predetermined finger based on the fingerprint image. A position correcting unit 40 corrects the palm vein image based on the longitudinal direction of the predetermined finger, and the reference direction of the predetermined finger. A vein characteristic information extracting unit 4 obtains vein characteristic information from a corrected palm vein image. A verification processing unit 32 matches the vein characteristic information obtained with the reference vein characteristic information for authentication.

Abstract: A computer recognizes a first individual address of each of one or more other devices located in a first environment in which the computer is located at a first point in time, maps each first individual address to a first individual point in a coordinate space, and recognizes a first distribution using coordinates of each first individual point. The computer recognizes a second individual address of each of one or more other devices located in a second environment in which the computer is located at a second point in time, maps each second individual address to a second individual point in the coordinate space, and recognizes a second distribution using coordinates of each second individual point. The computer judges whether the first distribution and the second distribution match in accordance with a distribution matching criterion as to whether two distributions match.

Abstract: A biometric authentication method is executed by a biometric authentication system comprising a server device to store biometric data of a plurality of users in a registering unit; and a client device to retain the biometric data sampled from the user and authenticated by the server device in a retaining unit together with user information. The method comprises verifying the biometric data sampled from the user with the cache biometric data retained in the retaining unit when in authentication; acquiring synthesized information of the cache biometric data of which the verification gets successful and the biometric data sampled from the user; and authenticating the synthesized information by use of the biometric data specified by the user information of the biometric data of which the verification gets successful in plural sets of biometric data registered in the registering unit.

Abstract: A biometric-information processing apparatus and method including storing sample biometric information of a user each time biometric authentication processing for verifying sample biometric information of a user against enrolled biometric information registered in a first storage unit succeeds, where the user's sample biometric information is stored in a second storage unit, and selecting an update-candidate biometric information for updating the user's enrolled biometric information from the user's sample biometric information stored in the second storage unit, based on a result of verification of multiple pieces of the user's sample biometric information stored in the second storage unit against enrolled biometric information of other users.

Abstract: An authentication system in which a authentication server and a plurality of clients are coupled through a network and configured to process an authentication from a user of a client, is configured to determine as a cache target user another user who is different from the user who requested the authentication; is configured to generate an identifier that indicates the cache target user; and is configured to transmit biometric data of the cache target user and the identifier to the client from which the authentication of the user was requested. A cache availability determiner can determine whether biometric data of any cache target user are available on a client.

Abstract: An authentication server transmits authentication information used to authenticate the transmission origin of an authentication request, to a sub-authentication server, when receiving the authentication request. The authentication server transmits identification information to identify the sub-authentication server to which the authentication information is transmitted, to a terminal. The terminal includes a transmission destination storage unit that stores identification information to identify the transmission destination of the authentication request and transmits the authentication request to the transmission destination identified with the identification information stored by the transmission destination storage unit. The terminal updates the identification information using the identification information, when receiving the identification information.

Abstract: A computer recognizes a first individual address of each of one or more other devices located in a first environment in which the computer is located at a first point in time, maps each first individual address to a first individual point in a coordinate space, and recognizes a first distribution using coordinates of each first individual point. The computer recognizes a second individual address of each of one or more other devices located in a second environment in which the computer is located at a second point in time, maps each second individual address to a second individual point in the coordinate space, and recognizes a second distribution using coordinates of each second individual point. The computer judges whether the first distribution and the second distribution match in accordance with a distribution matching criterion as to whether two distributions match.

Abstract: A biometric authentication method is executed by a biometric authentication system comprising a server device to store biometric data of a plurality of users in a registering unit; and a client device to retain the biometric data sampled from the user and authenticated by the server device in a retaining unit together with user information. The method comprises verifying the biometric data sampled from the user with the cache biometric data retained in the retaining unit when in authentication; acquiring synthesized information of the cache biometric data of which the verification gets successful and the biometric data sampled from the user; and authenticating the synthesized information by use of the biometric data specified by the user information of the biometric data of which the verification gets successful in plural sets of biometric data registered in the registering unit.

Abstract: A fingerprint image obtaining unit 1 obtains a fingerprint image of multiple fingers. A vein image obtaining unit 3 obtains a palm vein image. An authentication information DB 6 stores reference vein characteristic information, and a reference direction of a predetermined finger in a reference palm vein image for which the reference vein characteristic information is obtained. A reference obtaining unit 20 detects a longitudinal direction of a predetermined finger based on the fingerprint image. A position correcting unit 40 corrects the palm vein image based on the longitudinal direction of the predetermined finger, and the reference direction of the predetermined finger. A vein characteristic information extracting unit 4 obtains vein characteristic information from a corrected palm vein image. A verification processing unit 32 matches the vein characteristic information obtained with the reference vein characteristic information for authentication.

Abstract: An authentication system includes a plurality of personal authentication servers, a client terminal, a replacing portion and a renewing portion. The plurality of personal authentication servers store at least a part of enrolled data different from each other for user personal authentication and perform authentication with stored enrolled data according to authentication request from a client terminal. The client terminal stores identification information for specifying the personal authentication server storing each enrolled data, and requests an authentication to the personal authentication server specified with the identification information. The replacing portion replaces at least a part of the enrolled data between the plurality of personal authentication servers according to the authentication request condition to the plurality of personal authentication servers from the client terminal. The renewing portion renews the identification information according to the replacing result of the replacing portion.

Abstract: An authentication system in which a authentication server and a plurality of clients are coupled through a network and configured to process an authentication from a user of a client, is configured to determine as a cache target user another user who is different from the user who requested the authentication; is configured to generate an identifier that indicates the cache target user; and is configured to transmit biometric data of the cache target user and the identifier to the client from which the authentication of the user was requested. A cache availability determiner can determine whether biometric data of any cache target user are available on a client.

Abstract: An authentication server transmits authentication information used to authenticate the transmission origin of an authentication request, to a sub-authentication server, when receiving the authentication request. The authentication server transmits identification information to identify the sub-authentication server to which the authentication information is transmitted, to a terminal. The terminal includes a transmission destination storage unit that stores identification information to identify the transmission destination of the authentication request and transmits the authentication request to the transmission destination identified with the identification information stored by the transmission destination storage unit. The terminal updates the identification information using the identification information, when receiving the identification information.

Abstract: A biometric authentication method includes an enrollment step of generating enrollment-purpose mixed feature point information by extracting enrollment-purpose true feature point information from input enrollment-purpose biometric information, and by combining part of the enrollment-purpose true feature point information, which is selected based on dummy data generated at random, and false feature point information generated based on the dummy data, and an authentication step of executing authentication by extracting authentication-purpose feature point information from input authentication-purpose biometric information, generating authentication-purpose mixed feature point information that includes part of the authentication-purpose feature point information, which is selected based on the false feature point information, and the false feature point information, and by matching the authentication-purpose mixed feature point information with the enrollment-purpose mixed feature point information.

Abstract: A biometric-information processing apparatus and method including storing sample biometric information of a user each time biometric authentication processing for verifying sample biometric information of a user against enrolled biometric information registered in a first storage unit succeeds, where the user's sample biometric information is stored in a second storage unit, and selecting an update-candidate biometric information for updating the user's enrolled biometric information from the user's sample biometric information stored in the second storage unit, based on a result of verification of multiple pieces of the user's sample biometric information stored in the second storage unit against enrolled biometric information of other users.

Abstract: An authentication system includes a plurality of personal authentication servers, a client terminal, a replacing portion and a renewing portion. The plurality of personal authentication servers store at least a part of enrolled data different from each other for user personal authentication and perform authentication with stored enrolled data according to authentication request from a client terminal. The client terminal stores identification information for specifying the personal authentication server storing each enrolled data, and requests an authentication to the personal authentication server specified with the identification information. The replacing portion replaces at least a part of the enrolled data between the plurality of personal authentication servers according to the authentication request condition to the plurality of personal authentication servers from the client terminal. The renewing portion renews the identification information according to the replacing result of the replacing portion.