Wireless power reception device and wireless power transmission device

A wireless power receiver comprising:

• a power pickup circuit configured to receive wireless power from a wireless power transmitter based on magnetic coupling with the wireless power transmitter;
• and
• a communication/control circuit configured to control the wireless power,
• wherein the wireless power receiver is configured to:
• transmit, to the wireless power transmitter via an in-band communication, a configuration packet for the wireless power receiver, wherein the configuration packet includes first authentication information specifying whether an authentication function is supported or not;
• receive, from the wireless power transmitter via the in-band communication, a capability packet for the wireless power transmitter, wherein the capability packet includes second authentication information specifying whether the authentication function is supported or not;
• and
• initiate a creation process of an authenticated link based on accepting only a connect request received within a predetermined authentication accept period,
• wherein the predetermined authentication accept period is calculated from a time of exchanging a last packet via the in-band communication,
• wherein the last packet including out-band information is exchanged after transmitting the configuration packet,
• wherein a connection request received outside of the predetermined authentication accept period is ignored,
• wherein the creation process of the authenticated link is performed based on an out-band communication,
• wherein the wireless power receiver is an authentication initiator and the wireless power transmitter is an authentication responder,
• wherein, based on authentication being completed and certificate exchange being made,
• the authentication initiator generates a first Diffie-Hellman public key and a first signature and transmits the first Diffie-Hellman public key and the first signature to the authentication responder,
• the authentication initiator receives a second Diffie-Hellman public key and a second signature from the authentication responder, and
• the authentication initiator creates the authenticated link with the authentication responder based on the first Diffie-Hellman public key, the first signature, the second Diffie-Hellman public key and the second signature.