Patent ID: 7426275
Filing Date: 2008-09-16
Classification: B60R,G07C

Abstract:
1. A handling device of security data comprising: an in-vehicle unit having a portable unit authenticating unit, a nonvolatile memory, a general controller, and a data encryption controller; a vehicle having the in-vehicle unit, and a communication unit; and a portable unit for giving a control instruction to the in-vehicle unit of the vehicle through communication with the communication unit, wherein a first cipher key is stored in the portable unit and the in-vehicle unit, wherein the portable unit transmits a signal encrypted with the first cipher key indicating a ID of the portable unit to the vehicle, the communication unit receives the transmission signal, the portable unit authenticating unit authenticates as to whether the signal is a transmission signal that is transmitted from a predetermined portable unit based on a comparison between the reception signal encrypted with the first cipher key and data indicating the ID of the portable unit stored in the nonvolatile memory or not, the general controller causes the in-vehicle unit to perform the control instructions if the portable unit authenticating unit judges that the signal is a transmission signal that is transmitted from a predetermined portable unit, the data encryption controller for encrypting security data of the vehicle with a second cipher key is interposed between the general controller and the nonvolatile memory of the in-vehicle unit, and the security data is encrypted by the data encryption controller with the second cipher key and stored into the nonvolatile memory according to an instruction from the general controller when the in-vehicle unit is set into a security data register mode.