1 research outputs found
A Novel Physical Layer Encryption Scheme to Counter Eavesdroppers in Wireless Communications
Modern wireless communication systems employ
wideband modulated RF carriers to communicate the data of
interest between the nodes in the network. The security of
communications has been conventionally addressed in the data
link layers through scrambling and data encryption schemes.
These schemes however do not secure the air interface parameters
such as modulation scheme and leave them susceptible to
eavesdropping and interception by man-in-the-middle platforms.
Physical layer security schemes such as directional modulation,
DFT S OFDM and RF fingerprinting have been proposed. In this
paper, we propose a novel physical layer encryption scheme based
on the spectral profile of the intended modulated signal through
deliberately introduced constellation distortion to conceal the
modulation scheme. The scheme uses a dispersive filter in the
modulator with unique group delay profiles unknown to the
eavesdropper. The appropriate inverse filter is employed in the
authorized receivers to recover the original modulated basebands
for demodulation