Electronic key registration method and electronic key registration system

摘要

A method for registering an electronic key (2a) to a controller (4) of a communication subject (1) includes locating an electronic key ID (ID-1) of a registered electronic key (2a), which is registered to a first controller (4) that was previously installed in the communication subject (1), based on a communication subject ID (±) unique to the communication subject (1), and reregistering the registered electronic key (2a) to a second controller (4s,4t) installed in the communication subject (1) in lieu of the first controller (4) by storing the electronic key ID (ID-1) of the registered electronic key (2a) and an encryption code (K-1) corresponding to the electronic key ID (ID-1) in the second controller (4s,4t).