Communicating device and communicating method

摘要

The debugging unit writes a public key of the key issuing server and an initializing program given from outside, to the storage unit. The instruction executing unit reads and executes the initializing program stored in the storage unit. The debug disabling unit disables the debugging unit. The public-key encrypting unit encrypts the random number by the public key in the storage unit, the random number generated by the random number generating unit after the debugging unit is disabled. The transmitting unit transmits the encrypted random number to the key issuing server. The receiving unit receives an individual key encrypted by the random number from the key issuing server. The individual-key writing unit decrypts the encrypted individual key by the random number to obtain the individual key and write the individual key to the storage unit.

主权项

1. A communicating device comprising:
a storage unit; a debugging unit configured to write a public key of a key issuing server and an initializing program originating external to the communication device, to the storage unit; an instruction executing unit configured to read and execute the initializing program stored in the storage unit; a random-number generating unit configured to generate a random number; a debug disabling unit configured to disable the debugging unit by the initializing program being executed; an enabling unit configured to enable an interface by the initializing program being executed after the debugging port is disabled; and a public-key encrypting unit configured to encrypt the random number by the public key in the storage unit by the initializing program being executed, wherein the random number is generated by the random number generating unit and is encrypted by the public-key encrypting unit after the debugging unit is disabled and after enabling the interface by the initializing program; wherein the interface comprises:
a transmitting unit configured to transmit the encrypted random number to the key issuing server by the initializing program being executed; anda receiving unit configured to receive an individual key encrypted by the random number from the key issuing server by the initializing program being executed; and the communication device comprises an individual-key writing unit configured to decrypt the encrypted individual key by the random number to obtain the individual key and write the individual key to the storage unit, by the initializing program being executed.