Patent ID: 8763124

Claim:
An electronic device comprising: circuitry configured to share a secret key between the electronic device and another electronic device; receive a first response request, the first response request transmitted from the another electronic device using Transmission Control Protocol (TCP) and including first authentication data generated at the another electronic device based on a first random number; generate a first response message based on the first response request, the first response message transmitted to the another electronic device and generated based on the secret key and the first random number; receive a second response request, which is transmitted from the another electronic device in response to the another electronic device receiving the first response message, the second response request generated based on the secret key and a second random number; and generate a second response message based on the second response request, the second response message transmitted to the another electronic device and including second authentication data generated based on the secret key and the second random number, wherein the electronic device is authorized to receive data from the another electronic device when the second authentication data matches expected authentication information generated by the another electronic device based on the secret key and a predetermined time elapsed from a transmission of the second response request does not expire before the second response message is received by the another electronic device.