Patent ID: 7822994

Claim:
A data bus line, comprising: at least one encryption/decryption device, the at least one encryption/decryption device performing both encryption of digital data transferred on the data bus line and decryption of the digital data, wherein the data bus line connects at least one data storing device with a bus controller and transfers the digital data between the data storing device and the bus controller, and wherein the at least one encryption/decryption device encrypts the digital data received from the bus controller to store the encrypted digital data in the data storing device, and decrypts the encrypted digital data stored in the data storing device to deliver the decrypted digital data to the bus controller; an ID memory device which stores a device ID; and an identification detecting device which detects the device ID of at least one of the bus controller and an end device, wherein if the identification detecting device detects the device ID is correct, the encryption/decryption device is configured to encrypt or decrypt the digital data.