US 2021/0345102 A1 · PHYSICAL LAYER KEY GENERATION

Abstract

Physical layer key generation provides privacy protection technique suitable for devices with limited computational ability. A key generation algorithm is based on OFDM waveforms. By exploiting the holistic CSI, key generation rate (KGR) is improved significantly. A cross-layer encryption protocol is based on the key generation algorithm and the AES. The secrecy of the encryption is enhanced compared to traditional encryption schemes with one pre-shared key (e.g., WPA2-PSK), even when some generated keys are leaked to the eavesdropper. The results lead to practical and robust applications of physical layer key generation.

Claims16

Dependent claims

A method of sending an electronic communication from a sender to a receiver through a reciprocal communication channel, the method comprising:

correlating phase-related channel state information between the sender and the receiver, thereby producing correlated phase-related channel state information that is substantially equal at the sender and receiver;
generating an encryption key using the correlated phase-related channel state information;
and
encrypting the electronic communication using the encryption key and an encryption protocol.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/014,611Filed 8 Sep 2020

Priority

8 Nov 2019

Published

4 Nov 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04W 12/03
Security arrangements; Authentication; Protecting privacy or anonymity: protecting confidentiality, e.g. by encryption
H04L 5/0007
Time-frequency: the frequencies being orthogonal, e.g. OFDM or DMT
H04L 9/085
Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for…:…
H04L 9/0875
Generation of secret information including derivation or calculation of cryptographic keys or passwords: based on channel impulse response [CIR]

Physical layer key generation

Life of this patent

Physical layer key generation

Life of this patent

Abstract

Claims16