APPLICATION LINKAGE METHOD, COMPUTER PROGRAM, AND APPLICATION LINKAGE SYSTEM

摘要

The present invention provides an application linkage method, a computer program, and an application linkage system. In this application linkage method, an information terminal device: stores application account data of a user for a first application and a second application, and block chain account data of the user in a block chain system; transmits, in association with the block chain account data, a request for linking the first application and the second application to a first device that provides the first application or a second device that provides the second application; on the basis of the request for linking, causes the first device to transmit, to the block chain system, a request for giving the block chain account data a token based on the result of use of the first application by the user associated with the application account data; and causes the second device to obtain data about the presence or absence of the token given to the block chain account data, the amount of the token, and the content of or conditions for the token.