An OFDM cross-layer encryption secure communication scheme

Abstract

Orthogonal frequency division multiplexing (OFDM) is a multi-carrier transmission technology. It has great spectrum efficiency, strong anti-interference ability and relatively simple system structure. Orthogonal frequency division multiplexing has become one of the key technologies of 4G and the next wireless communication generation. Traditional stream cipher encryptions are usually performed by independently encrypting a message bit with a key stream bit through XOR operations. This is easy to perform and is in common use. But the transmission speed is constrained by devices. In this paper, we present an OFDM encryption scheme. Using less key streams and achieving good security levels.