Physical layer key information encryption method and decryption method of distributed flexible resources

The invention relates to the technical field of novel power system communication, and discloses a physical layer key information encryption method and decryption method for distributed flexible resources, and the physical layer key information encryption method comprises the steps: carrying out the preprocessing of a channel estimation matrix, so as to generate a physical layer initial key, and carrying out the encryption of the physical layer key information based on a chaos initial encryption strategy; and decomposing the physical layer initial key into a first key parameter and a second key parameter, inputting the second key parameter into the Chen's chaotic system to generate a target chaotic sequence, encrypting the initial modulation signal based on the target chaotic sequence and the first key parameter to generate a target modulation signal, and sending the target modulation signal to a second user terminal. According to the method, the randomness and security of the key information are enhanced by g