A device control apparatus connecting with at least a device, comprising a processor for storing first key information, a memory section for storing encrypted second key information which is obtainedby encrypting second key information such that the second key information is able to be restored through decryption using the first key information, and an interface section for carrying out authentication using the second key information when an access instruction requiring access to a device is given by the processor, and for controlling the access to the device based on the access instruction when the authentication is established.