Beidou geological disaster monitoring data encryption and decryption method

The invention discloses a Beidou geological disaster monitoring data encryption and decryption method, and relates to the technical field of earth surface crack measurement, and the method comprises the steps: cutting positioning coordinate data, and converting the data into numerical values through ASCII coding; fourier transform is carried out; converting the frequency domain signal into a byte sequence, and performing preliminary encryption on the signal by using an encryption algorithm; generating a pseudo-random sequence based on a pre-secret key, and performing an XOR operation; and transmitting to a receiving end to finish encryption. Performing XOR operation on the received data and a pseudo-random sequence generated based on the same key; the signal is decrypted; and restoring the original positioning coordinate data through inverse Fourier transform. The method provided by the invention has good anti-interference capability, can be recovered even if being interfered in a transmission process, and ha