Spread spectrum parameter agile method based on random signals

The invention provides a spread spectrum parameter agile method based on random signals. The method comprises the following steps: a legal sender acquires channel information and sends a locally generated initial random signal to a legal receiver; the legal sender generates a first random signal according to the channel information and the initial random signal; the legal receiver uses the received signal as a second random signal; the received signal comprises the initial random signal and the channel information; the legal sender and the legal receiver respectively quantize the first randomsignal and the second random signal by using the same quantization method to generate a first random sequence and a second random sequence; both the legal communication parties carry out consistency negotiation according to the first random sequence and the second random sequence, and consistent sequences are separately generated locally; and both the legal communication parties separately generate spread spectrum codes l