The invention relates to the technical field of
information security, and designs a beidou D2 navigation message anti-
cheating scheme based on domestic passwords and
spread spectrum information protection. In recent years, the Beidou
navigation system serves as a new member of the GNSS, and the positioning principle of the Beidou
navigation system is similar to that of the GPS.
Signal parameters and information structures of civil signals are disclosed to the public through related files, so that a deception party can easily manufacture the deception
signal and initiate a deception
attack, thereby controlling a positioning result of a
receiver and causing extremely serious consequences. According to the invention, domestic cryptographic algorithms (SM2, SM3 and SM4) are adopted to generateauthentication information, so that spoofing attacks are detected. In addition, the signature and other
authentication information are subjected to information protection in a
spread spectrum modulation mode, and therefore the
authentication information is prevented from being tampered. According to the invention, a
simulation experiment is carried out through
MATLAB and OpenSSL platforms, and experiment results show that the method can
resist spoofing attacks.