Terminal for executing an application program where notification of the source of the application program is displayed and repeater

摘要

A terminal device comprises: a storage means for storing applications; writing control means for writing an application to the storage means and when the application to be stored satisfies a predetermined condition writing a corresponding identifier associated with the application into the storage means and application executing means for executing an application stored in the storage means and for indicating to a user a predetermined notification on the basis of the identifier corresponding to the application. The predetermined condition can be such as whether the application was downloaded from a network or whether the application includes information indicating that it is guaranteed by a third party which is different from a provider of the data. A relay device for relaying data between a first network and a second network comprises receiving means for receiving data from the first network and forwarding means for forwarding data received by the receiving means to the second network and for adding a predetermined identifier to the data when reliability of the data is not assured by a third party which is different from a provider of the data.