Patent ID: 9621535
Date: 2017-04-11
CPC Classifications: G07C,H04L,H04W

Claim:
1. An electronic key system comprising: at least one mobile device carried by a user; and a control device that executes authentication processing based on a result of information communication with the mobile device, wherein: main identification information identifying the control device is registered in the control device as registrant identification information; when the mobile device receives a response request including the registrant identification information and response timing, the mobile device compares the registrant identification information and the response timing which are included in the response request with registrant identification information and response timing which are registered in the mobile device, the response timing represents a timing specific to the mobile device at which the mobile device is to transmit a response including a mobile device code serving as identification information to identify the mobile device; when a result of the comparing is a match, the mobile device transmits the mobile device code allocated to the mobile device to the control device; the control device includes a registration unit that executes registration control in which the registration unit newly generates the main identification information with different content each time a registration command is inputted from outside and registers the newly generated main identification information in a storage device of the control device in association with the mobile device code of the mobile device as the registrant identification information.