| 摘要 |
In a setting phase, a master apparatus M assigns addresses As1 to As3 to slave devices S1 to S3, respectively, and transmits random numbers R1 to R3 to the slave device S1 to S3 using the assigned addresses. When the random numbers are received, the slave devices S1 to S3 encrypt unique IDS1 to IDS3 by a secret key MK to generate encrypted data C1 to C3. The master apparatus M obtains the encrypted data C1 to C3 from the slave devices S1 to S3, decrypts the obtained encrypted data C1 to C3 by a secret key MK held by the master apparatus M, and generates a correspondence table which indicates a correspondence between the decrypted unique IDS1 to IDS3 and the addresses As1 to As3 used to obtain the unique IDS1 to IDS3. |
| 主权项 |
1. A communication system comprising:
a master apparatus; and a plurality of apparatuses, each being connected at each connection position which determines an address order and performing communication with the master apparatus, each apparatus of the plurality of apparatuses including:
memory to store an identifier and first secret information; andan encryptor to encrypt the identifier by the first secret information, the master apparatus including:
a master memory to store second secret information;a master communicator to perform communication with each apparatus; anda master controller to assign, to each apparatus, an address in accordance with the address order and to be used for the communication, as an initial address, and using the initial address, transmit a first identifier request for requesting an identifier to each apparatus from the master communicator, the encryptor of each apparatus, when the first identifier request is received, encrypting the identifier by the first secret information to generate an encrypted identifier, the master controller obtaining the encrypted identifier from each apparatus with the master communicator, decrypting the obtained encrypted identifier by the second secret information, and generating correspondence information which indicates a correspondence between the decrypted identifier and the initial address used to obtain the decrypted identifier. |
