Abstract: In a server; a ticket allotting unit generates, in response to a first request from a first user, first-type image code and stores the first-type information in a management database (DB) in a manner corresponding to a second user. Moreover, in response to a second request from the first user, generates second-type image code which is different from the first-type image code and stores the second-type image code in the management DB in a manner corresponding to a third user. Then, for example, a QR returning unit invalidates the first-type information stored in the management DB and validates the second-type information stored in the management DB. Then, a QR displaying unit sends the second-type image code to the third user.

Abstract: A user information managing method, an application distributing method, a user information managing server, an application distributing server, a user information managing program, and an application distributing program to allow the application provider to easily manage the user information even if distribution of applications is outsourced to a third party are provided. The user information managing server for managing user information of a user using the application providing service includes an authenticating part for authenticating the user terminal in response to a request made from the user terminal to use the application, and a distribution requesting part for requesting, based on the result obtained from the authentication part, to the outsourced third party the distribution of the applications to the user terminal by transmitting a distribution request to the outsourced third party.