The invention discloses a dynamic key
encryption communication method in a
monitoring system, and the method comprises the steps: S1, generating a random dynamic key and a
convolution matrix after monitoring equipment is started; s2, the monitoring equipment initiates a connection establishment request, encrypts the serial number SN of the monitoring equipment and the
authentication key through the
master key, and sends the serial number SN and the
authentication key to the
server; s3, the
server side verifies the serial number SN and the
authentication key of the monitoring equipment, if the key is correct, a
correct response is returned, and otherwise, a wrong response is returned; s4, if the monitoring equipment receives the
correct response, the monitoring equipment sends the dynamic
key generation method and the dynamic key initial value to the
server side together, and the
server side replies the response to the monitoring equipment after receiving the command; and S5, then the monitoring equipment and the
server side communicate according to the agreed dynamic key, and the key needs to be regenerated every time the
request response is completed, the key is hidden in the form of the dynamic key, so that the security of information interaction is ensured, the number of
encryption rounds can be reduced, and the
encryption and decryption efficiency is improved.