In a communications terminal 3, a CPU 32 retrieves start-up data
112 from a server 1 using a Web browser 311, which is stored
in a storage device 31. The CPU 32 performs data authentication with
respect to authentication type data 1123 included in the start-up data 112.
Then, when the authentication is succeeded, the CPU 32 follows the authentication
type data 1123 so as to determine which authentication mode is to be used
for authenticating the application data. In this manner, the authentication mode
for authenticating the application data can be easily changed.
