| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that there is the risk where a vehicle security system may be operated illegally by a transmission device by forging the transmission device based on a read encryption key in a case where the encryption key is being stored in a nonvolatile memory or the like such as an EEPROM (Electrically Erasable Programmable Read-Only Memory) or a flash memory like a conventional vehicle security system. SOLUTION: In response to a remote control key 2, identification information encrypted by an encryption section 23 using a first encryption key K1 is transmitted to a receiving apparatus 10 by a transmitting section 21. In the receiving apparatus 10, a receiving section 11 receives the encrypted identification information, and a decryption section 13 decrypts the information using a second encryption key K2 pairing with the first encryption key K1. This second encryption key K2 is stored in an FeRAM 5 and is erased when being read out of the FeRAM 5 to the outside. COPYRIGHT: (C)2009,JPO&INPIT
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