US 2013/0156181 A1 · APPARATUS AND METHOD FOR GENERATING SECRET KEY USING CHANGE IN WIRELESS CHANNEL ON WIRELESS COMMUNICATION NETWORK

Abstract

A secret key generation apparatus and method are provided. The secret key generation apparatus includes at least one antenna, amplification/phase controllers, a transceiver, and a random sign& controller. The antenna receives a wireless signal from a counterpart terminal that performs wireless communication. The amplification/phase controllers control the amplification gain and phase of the wireless signal that is received via at least one antenna. The transceiver measures the status of a wireless channel using the wireless signal having the controlled amplification gain and phase, determines parameters based on results of the measurement, and generates a secret key based on results of the determination. The random signal controller controls the amplification/phase controllers so that the amplification gain and phase are adjusted whenever the transceiver generates a secret key.

Claims13

Dependent claims

A secret key generation apparatus comprising:

an at least one antenna configured to receive a wireless signal from a counterpart terminal that performs wireless communication;
amplification/phase controllers configured to control amplification gain and phase of the wireless signal that is received via at least one antenna;
a transceiver configured to measure status of a wireless channel using the wireless signal having the controlled amplification gain and phase, to determine parameters based on results of the measurement, and generate a secret key based on results of the determination;
and
a random signal controller configured to control the amplification/phase controllers so that the amplification gain and phase are adjusted whenever the transceiver generates a secret key.

2 more elements

A secret key generation method comprising:

performing frame synchronization with a counterpart terminal that performs wireless communication;
receiving a wireless signal from the counterpart terminal, and measuring long-period wireless channel status from the wireless signal;
determining parameters to be used to generate a secret key while taking into consideration the long-period wireless channel status;
changing a wireless channel response by controlling amplification gain and phase of the wireless signal, and measuring short-period wireless channel status based on the changed wireless channel response;
and
generating the secret key using the parameters in the short-period wireless channel status.

3 more elements

Dependencies are inferred from the claim text.

Apparatus and method for generating secret key using change in wireless channel on wireless communication network

Life of this patent

Apparatus and method for generating secret key using change in wireless channel on wireless communication network

Life of this patent

Abstract

Claims13