Precaching-based authentication method and device in wireless power transmission system

The present disclosure provides a method for receiving wireless power from a wireless power transmitter, carried out by a wireless power receiver in a wireless power transmission system, and a device using same, the method comprising: transmitting an authentication request message to a wireless power transmitter, the authentication request message being a message requesting a part among a root certificate, a manufacturer certificate, and a product certificate; receiving an authentication response message from the wireless power transmitter, the authentication response message being a message including the part; and determining whether all the pre-verified certificates corresponding to the part are present in a wireless power receiver.