NETWORK SYSTEM AND METHOD FOR AUTHENTICATION USED IN NETWORK SYSTEM

摘要

A management server (3) includes an encrypting unit (302) for shuffling a control program and authentication information in response to a transmission request of a terminal (1), a combining unit (303) for combining the shuffled control program and the shuffled authentication information, a communication control unit (301) for transmitting the combined information to the terminal (1), and a permission signal generating unit (305) for checking the decrypted authentication information from the terminal (1) with the original authentication information and generating, if they are the same, a permission signal representing permission of installation of the control program. A terminal (1) includes a communication control unit (101) for transmitting a transmission request to the management server (3), a decrypting unit (103) for separating the combined information from the management server (3) into the control program and the authentication information and decrypting them , a communication unit (101) for returning the decrypted authentication information to the management server (3), and an installing unit (104) for starting installation of the control program when the terminal (1) receives a permission signal from the management server (3).