Data usage method, system, and program thereof employing blockchain network (bcn)

Abstract

The purpose of the present invention is to provide a new data utilization system in which, while an individual independently uses and utilizes one’s own personal data, security and anonymity of the data can be effected. An information processing device used by an individual comprises^ a function of transmitting, over a network, data relating to an address on a blockchain network used by the individual to a provider-side information processing device comprising a storage device that is a provision source of data associated with information about the individual! a function of referring to access data (ACT) that includes the data relating to the blockchain network address and data for identifying the provision source of the data and that is issued by the provision-side information processing device for the blockchain network address! and a function of, on the basis of the access data (ACT), acquiring the data associated with the information about the individual from the provider-side storage device and storing said data at least in a storage device or a memory of said individual.

1 . A method for enabling a user of a first information processing device or a third-party of a third-party information processing device access data of a user stored in a storage device used by a second information processing device associated with a provider of the data of the user stored in the storage device, the method comprising:
 providing, with the first information processing device of the user, a blockchain address associated with the user to the second information processing device, the blockchain address indicating a storage area on a blockchain network used by the first information processing device of the user wherein the storage area being configured to facilitate recording data using a distributed ledger;   generating, with the second information processing device, access ticket data (ACT), wherein the access ticket data (ACT) including a first information associated with the blockchain address provided by the user and a second information associated with identification of the data of the user permitted by the second information processing device to be accessed from the first information processing device of the user; and   registering, with the second information processing device associated with the provider of the data or with the first information processing device of the user receiving the access ticket data (ACT) from the second information processing device, the access ticket data (ACT) for recordation in the distributed ledger in the storage area of the blockchain network at the blockchain address used by the first information processing device of the user so that the first information processing device or the third-party information processing device provided with the access ticket data (ACT) from the first information processing device enables to access the data of the user stored in the storage device and identified by the access ticket data (ACT) registered in the storage area of the blockchain network.   
     
     
         2 . A system for enabling a user of a first information processing device or a third-party of a third-party information processing device to access data of the user stored in a storage device used by a second information processing device associated with a provider of the data of the user stored in the storage device, the system comprising: 
 the first information processing device used by and associated with the user and configured to provide a block-chain address associated with the user to the second information processing device that uses the storage device and is associated with the provider of the data of the user, the blockchain address indicating a storage area on a blockchain network used by the first information processing device of the user and the storage area being configured to facilitate recording data using a distributed ledger; and   the second information processing device being configured to generate access ticket data (ACT), wherein the access ticket data (ACT) including a first information associated with the blockchain address provided by the user and a second information associated with identification of the data of the user permitted by the second information processing device to be accessed from the first information processing device of the user; and register the access ticket data (ACT) for recordation in the distributed ledger in the storage area of the blockchain network at the blockchain address used by the first information processing device of the user so that the first information processing device or the third-party information processing device provided with the access ticket data (ACT) from the first information processing device enables to access the data of the user stored in the storage device and identified by the access ticket data (ACT) registered in the storage area of the blockchain network.   
     
     
         3 . The method according to  claim 1 , wherein each transaction record of a plurality of transaction records includes history data conceming the user. 
     
     
         4 . The method according to  claim 3 , wherein each transaction record of the plurality of transaction records indicates latest data in the data set of the history data.