DATA TRANSMISSION DEVICE, DATA RECEPTION DEVICE, SERVER, DATA SHARING SYSTEM, DATA TRANSMISSION PROGRAM, DATA RECEPTION PROGRAM, DATA SHARING PROGRAM, AND COMPUTER-READABLE RECORDING MEDIUM

摘要

A data sharing system includes: a shared data storage unit (40) for storing shared data shared between a plurality of devices transmitted from a data transmission device (1); a management table management unit (45) for correlating the shared data to shared device information and managing them; a server side transmission information generation unit (25) transmits, upon reception of the shared data, the shared data identifier and authentifier to a data reception device (3) to share the shared data according to the shared device information by using a telephone line (4); a password judgment unit (43) for judging whether the authentifier received from the data reception device (3) via a radio LAN line having a higher communication speed than the telephone line (4) coincides with the authentifier transmitted from the local device; and a reception side management unit (47) for transmitting, if the judgment of the password judgment unit (43) results in coincidence, the shared data to the data reception device (3) via the radio LAN line. Thus, it is possible to realize a data sharing system in which information can be surely shared only between particular users.