Patent ID: 8407470
Filing Date: 2013-03-26
Classification: G08C

Abstract:
1. A control device communicating with a controlled device to control the controlled device, comprising: a first memory to store first authentication information configured to authenticate the controlled device; a second memory to store second authentication information configured to enable the controlled device to authenticate the control device; a detector to detect third authentication information transmitted by the controlled device; a determination unit to compare the third authentication information detected by the detector with the first authentication information stored in the first memory; a calculator to perform calculation processing on the first authentication information or the third authentication information using the second authentication information to generate a calculated value when the determination unit determines that the third authentication information and the first authentication information are matched; a transmitter to transmit the calculated value to the controlled device; and a memory controller to update the first authentication information in response to receiving a confirmation signal sent from the controlled device in reply to the transmission of the calculated value to the controlled device, by replacing the first authentication information stored in the first memory with the calculated value.