Abstract: A user terminal generates a first key pair and a second key pair, transmits a permission request including a public encryption key of the second key pair after electronically signing the permission request with a secret encryption key, and acquires, from permission information transmitted from a right-holder terminal, a content decryption key by using a secret decryption key of the second key pair and uses the content. The right-holder terminal stores a third key pair and the content decryption key, verifies the permission request received, and encrypts the content decryption key by using the public encryption key of the second key pair included in the permission request and transmits the permission information including the encrypted content decryption key after electronically signing the permission information with a secret encryption key of the third key pair. The permission request and the permission information are transmitted and received via a blockchain.

Abstract: The blockchain generation apparatus 1 includes: a parameter calculator 122 that identifies a parameter type to be used for linkage of the new block, based on block approval method data 114, and calculates a value for the identified parameter type based on transaction datasets which are related to an identifier of a generating party; a block generation condition checker 125 that determines whether the generating party is qualified to generate the new blockchain data, based on the value calculated by the parameter calculator 122; and a blockchain generator 126 that tries to generate the new blockchain by referring to the shared data when the block generation condition checker 125 determines that the generating party is qualified. An identifier of the blend pattern included in the block approval method data 114 specifies a combination of the plurality of parameter types that conflict with each other.

Abstract: A user terminal generates a first key pair and a second key pair, transmits a permission request including a public encryption key of the second key pair after electronically signing the permission request with a secret encryption key, and acquires, from permission information transmitted from a right-holder terminal, a content decryption key by using a secret decryption key of the second key pair and uses the content. The right-holder terminal stores a third key pair and the content decryption key, verifies the permission request received, and encrypts the content decryption key by using the public encryption key of the second key pair included in the permission request and transmits the permission information including the encrypted content decryption key after electronically signing the permission information with a secret encryption key of the third key pair. The permission request and the permission information are transmitted and received via a blockchain.

Abstract: A user terminal generates a first key pair and a second key pair, transmits a permission request including a public encryption key of the second key pair after electronically signing the permission request with a secret encryption key, and acquires, from permission information transmitted from a right-holder terminal, a content decryption key by using a secret decryption key of the second key pair and uses the content. The right-holder terminal stores a third key pair and the content decryption key, verifies the permission request received, and encrypts the content decryption key by using the public encryption key of the second key pair included in the permission request and transmits the permission information including the encrypted content decryption key after electronically signing the permission information with a secret encryption key of the third key pair. The permission request and the permission information are transmitted and received via a blockchain.

Abstract: A user terminal generates a first key pair and a second key pair, transmits a permission request including a public encryption key of the second key pair after electronically signing the permission request with a secret encryption key, and acquires, from permission information transmitted from a right-holder terminal, a content decryption key by using a secret decryption key of the second key pair and uses the content. The right-holder terminal stores a third key pair and the content decryption key, verifies the permission request received, and encrypts the content decryption key by using the public encryption key of the second key pair included in the permission request and transmits the permission information including the encrypted content decryption key after electronically signing the permission information with a secret encryption key of the third key pair. The permission request and the permission information are transmitted and received via a blockchain.

Abstract: The blockchain generation apparatus 1 includes: a parameter calculator 122 that identifies a parameter type to be used for linkage of the new block, based on block approval method data 114, and calculates a value for the identified parameter type based on transaction datasets which are related to an identifier of a generating party; a block generation condition checker 125 that determines whether the generating party is qualified to generate the new blockchain data, based on the value calculated by the parameter calculator 122; and a blockchain generator 126 that tries to generate the new blockchain by referring to the shared data when the block generation condition checker 125 determines that the generating party is qualified. An identifier of the blend pattern included in the block approval method data 114 specifies a combination of the plurality of parameter types that conflict with each other.

Abstract: The blockchain generation apparatus 1 includes: a parameter calculator 122 that identifies a parameter type to be used for linkage of the new block, based on block approval method data 114, and calculates a value for the identified parameter type based on transaction datasets which are related to an identifier of a generating party; a block generation condition checker 125 that determines whether the generating party is qualified to generate the new blockchain data, based on the value calculated by the parameter calculator 122; and a blockchain generator 126 that tries to generate the new blockchain by referring to the shared data when the block generation condition checker 125 determines that the generating party is qualified. An identifier of the blend pattern included in the block approval method data 114 specifies a combination of the plurality of parameter types that conflict with each other.

Abstract: Methods, systems, and devices for leaving evidence of a contract on a blockchain with a simple method while having agreements made among the involved parties, maintaining the mode of one electronic signature per transaction, and maintaining credibility. Transactions of an issuing-party terminal, an agreeing-party terminal, and an agreeing-party terminal involved in contract agreement are linked as a chain, and the agreeing-party terminal at the end generates a transaction directed to the issuing-party terminal who has issued the contract. Each of these terminals previously generates a key pair for encryption of the contract and transmits the encryption key to a terminal which is its transaction sender. Then, this sender terminal encrypts a contract to be included in a transaction of the user of the sender terminal using the encryption key of the receiver of the transaction.

Abstract: The blockchain generation apparatus 1 includes: a synchronizer 121 that acquires shared data 111 which includes the blockchain data 112 and transaction datasets 113 not included in the blockchain data 112; a transaction pattern count calculator 124 that calculates the number of transaction patterns for a generating party using the blockchain generation apparatus 1, based on the transaction datasets which are in the blockchain data 112 and are related to an identifier of the generating party; a block generation condition checker 125 that determines whether the generating party is qualified to generate the new blockchain data, based on the number of transaction patterns calculated by the transaction pattern count calculator; and a blockchain generator 126 that tries to generate the new blockchain by referring to the shared data 111 if the block generation condition checker 125 determines that the generating party is qualified.

Abstract: The blockchain generation apparatus 1 includes: a parameter calculator 122 that identifies a parameter type to be used for linkage of the new block, based on block approval method data 114, and calculates a value for the identified parameter type based on transaction datasets which are related to an identifier of a generating party; a block generation condition checker 125 that determines whether the generating party is qualified to generate the new blockchain data, based on the value calculated by the parameter calculator 122; and a blockchain generator 126 that tries to generate the new blockchain by referring to the shared data when the block generation condition checker 125 determines that the generating party is qualified. An identifier of the blend pattern included in the block approval method data 114 specifies a combination of the plurality of parameter types that conflict with each other.

Abstract: This block chain generation device 1 is provided with: a synchronizing means 121 which acquires shared data 111 which includes block chain data 112 and transaction data 113 not contained in the block chain 112; a transaction pattern amount calculation means 124 which calculates the transaction pattern amount of a creator from the transaction data in the block chain data 112 that relates to an identifier of the creator who is using the block chain generation device 1; a block generation condition confirmation means 125 which, on the basis of the transaction pattern amount, determines whether or not the creator is qualified to generate new block chain data; and a block chain generation means 126 which, if the block generation condition confirmation means 125 determines that the creator is qualified, refers to the shared data 111 to attempt generation of a new block chain.

Abstract: A user terminal generates a first key pair and a second key pair, transmits a permission request including a public encryption key of the second key pair after electronically signing the permission request with a secret encryption key, and acquires, from permission information transmitted from a right-holder terminal, a content decryption key by using a secret decryption key of the second key pair and uses the content. The right-holder terminal stores a third key pair and the content decryption key, verifies the permission request received, and encrypts the content decryption key by using the public encryption key of the second key pair included in the permission request and transmits the permission information including the encrypted content decryption key after electronically signing the permission information with a secret encryption key of the third key pair. The permission request and the permission information are transmitted and received via a blockchain.

Abstract: Methods, systems, and devices for leaving evidence of a contract on a blockchain with a simple method while having agreements made among the involved parties, maintaining the mode of one electronic signature per transaction, and maintaining credibility. Transactions of an issuing-party terminal, an agreeing-party terminal, and an agreeing-party terminal involved in contract agreement are linked as a chain, and the agreeing-party terminal at the end generates a transaction directed to the issuing-party terminal who has issued the contract. Each of these terminals previously generates a key pair for encryption of the contract and transmits the encryption key to a terminal which is its transaction sender. Then, this sender terminal encrypts a contract to be included in a transaction of the user of the sender terminal using the encryption key of the receiver of the transaction.

Abstract: A token type content providing system is provided, in which the system includes a portable user terminal and a linkup server, the portable user terminal includes: a part for obtaining a token from an information notification medium; a part for sending the token to a linkup server; and a part for receiving content information; the linkup server includes: a part for determining one or more content identifier corresponding to the token by using a token table database; a part for obtaining one or more items of content information corresponding to the one or more content identifier; a part for selecting one or more items of content information by referring to the attribute information, and sending a part or the whole of selected content information to the portable user terminal.

Abstract: A technology is provided for a viewer of broadcast information or recorded information to easily obtain information related to the broadcast information or recorded information from a server, in which, in a system in which a viewer apparatus and a content providing server for providing content information related to video or voice are connected via a network, the viewer apparatus obtains related information necessary for obtaining the content information; sends the related information to the content providing server so as to request the content providing server to send the content information; and obtains the content information sent from the content providing server.

Abstract: Pop-up display information is created and displayed in a dynamic manner even without establishing settings in advance related to pop-up display for an anchor or an icon or the like, and implementing simple and efficient browsing by a user of linked contents by varying the display size in accordance with the display region. Mouse events of a mouse cursor upon a screen of an information device by the user are observed, and the fact that the mouse cursor has entered into a region of an object which has a linked destination is detected from the mouse events; a new window is displayed upon the screen; linked contents which are connected to the object are acquired; contents for presentation are created based upon the linked contents which have been acquired; and they are displayed within the new window which has been displayed upon the screen.

Abstract: Pop-up display information is created and displayed in a dynamic manner even without establishing settings in advance related to pop-up display for an anchor or an icon or the like, and implementing simple and efficient browsing by a user of linked contents by varying the display size in accordance with the display region. Mouse events of a mouse cursor upon a screen of an information device by the user are observed, and the fact that the mouse cursor has entered into a region of an object which has a linked destination is detected from the mouse events; a new window is displayed upon the screen; linked contents which are connected to the object are acquired; contents for presentation are created based upon the linked contents which have been acquired; and they are displayed within the new window which has been displayed upon the screen.

Abstract: A scheme for graphical user interface using a polygonal-line-shaped slider that enables a user to intuitively manipulate-and playback spatio-temporal media data such as video data and animation data without deteriorating the temporal continuity of the data in interactive manipulation and playback of the spatio-temporal media data is disclosed. In this scheme, the slider is composed of a polygonal line composed of at least one segment and a coordinate indicator that is moved along the polygonal line. Data corresponding to coordinates specified by the coordinate indicator is entered. The apparatus according to present invention stores the coordinates of vertexes of the polygonal line, stores input coordinates, maps the input coordinates onto a point on the polygonal line, and positions the coordinate indicator at the point.

Abstract: A technology is provided for a viewer of broadcast information or recorded information to easily obtain information related to the broadcast information or recorded information from a server, in which, in a system in which a viewer apparatus and a content providing server for providing content information related to video or voice are connected via a network, the viewer apparatus obtains related information necessary for obtaining the content information; sends the related information to the content providing server so as to request the content providing server to send the content information; and obtains the content information sent from the content providing server.

Abstract: A token type content providing system is provided, in which the system includes a portable user terminal and a linkup server, the portable user terminal includes: a part for obtaining a token from an information notification medium; a part for sending the token to a linkup server; and a part for receiving content information; the linkup server includes: a part for determining one or more content identifier corresponding to the token by using a token table database; a part for obtaining one or more items of content information corresponding to the one or more content identifier; a part for selecting one or more items of content information by referring to the attribute information, and sending a part or the whole of selected content information to the portable user terminal.