The invention provides a low-altitude unmanned aircraft de-counterfeiting method and device, and the method comprises the steps: adding a low-altitude unmanned aircraft to a
system, enabling parameters to comprise a unique number of the low-altitude unmanned aircraft, and enabling the
system to generate a corresponding
authentication key; the tool communicates with the low-altitude unmanned aircraft to obtain the unique number of the low-altitude unmanned aircraft; after acquiring the
authentication key of the low-altitude unmanned aircraft, the tool communicates with the low-altitude unmanned aircraft again, and writes the
authentication key into the low-altitude unmanned aircraft; the low-altitude unmanned aircraft generates a
digital signature through the unique number, the data and the authentication key, and the data and the signature are packaged into one piece of data to be broadcasted; when the ground acquisition equipment receives the
broadcast data, acquiring the unique number, sending a request to the
system, and acquiring an authentication key; and the ground acquisition equipment verifies whether the data, the authentication key and the
digital signature are matched or not. According to the method,
digital signature authentication is used, so that the pressure on the
server is reduced, and meanwhile, the interference of making decisions on the system is also reduced.