Method and apparatus for authentication of portable electronic devices

An authentication apparatus of a portable electronic device, the authentication apparatus comprising:

• a communication network which performs data communication relating to authentication via a plurality of communication lines;
• the portable electronic device which stores registration information including a system serial number used for authentication, transmits the system serial number to a mobile communication terminal connected by wire or wirelessly when authentication is required, receives an encoded temporary service authentication key from the mobile communication terminal, decoding the encoded temporary service authentication key, and applies the decoded temporary service authentication key to an application desired by a user to utilize the service, if receiving a call over the mobile communication terminal while a predetermined application is utilized, displaying information that the call is being received on a screen and performing a multitasking process which allows a user to continuously utilize the application while a telephone conversation is made over the mobile communication terminal;
• the mobile communication terminal which stores an authentication key used for authentication and a program for performing an authentication process, is connected to the portable electronic device, encodes the system serial number and the authentication key to generate an integration secrete key when receiving the system serial number for authentication from the portable electronic device, transmits the generated integration secrete key to an authentication center, requests authentication of the portable electronic device and approval for relay of the mobile communication terminal, decodes a temporary integration authentication key to obtain the approval for the relay when receiving a temporary service approval key which can be used by the portable electronic device and the temporary integration authentication key for approving the relay of the mobile communication terminal, encodes the temporary service approval key, and transmits the encoded temporary service approval key to the portable electronic device;
• and
• an authentication center computer which, when receiving the integration secrete key for requesting the authentication of the portable electronic device and the approval for the relay of the mobile communication terminal from the mobile communication terminal via the communication network, decodes the integration secrete key, processes the authentication of the portable electronic device and the approval for the relay of the mobile communication terminal, encodes the temporary service approval key which can be used by the portable electronic device and the temporary integration authentication key for approving the relay of the mobile communication terminal, and transmits the temporary service approval key and the temporary integration authentication key to the mobile communication terminal.