New energy station data encryption and decryption method and system

The invention discloses a new energy station data encryption and decryption method, which relates to the technical field of new energy station data encryption and comprises an encryption method and a decryption method. The encryption method comprises the following sub-steps: an initialization process; generating a hybrid pseudo-random sequence; blocking and XOR encryption based on a sliding window; performing index replacement on the ciphertext data; the decryption method comprises the following sub-steps: an initialization process; generating a hybrid pseudo-random sequence; carrying out inverse permutation operation on the ciphertext data block list Cblock list according to the obtained pseudo-random sequence Sint, and restoring the original position of the data; and performing XOR decryption operation on the ciphertext data according to the requested pseudo-random sequence Sint and inverse index permutation. According to the method, a complex pseudo-random sequence is generated by combining a plurality of