Alarm operation and maintenance method and system based on one-time password encryption and security authentication

Abstract

An alarm system operation and maintenance method and system based on one-time one encryption and security authentication. The main control device in the alarm system negotiates the key with different alarm devices to continuously generate a pair of shared keys. The alarm device in the alarm system encrypts the alarm event information through the one-time one encryption mechanism, periodically sends or sends the keep-alive data frame encapsulating the alarm event data and the key negotiation data to the main control device when the alarm event is triggered. The main control device verifies the data frame through the digital signature algorithm, generates the key based on the key negotiation data in the data frame, realizes the detection of the system operation and maintenance state and the link quality based on the keep-alive data frame, and triggers the operation and maintenance early warning process when the alarm event is detected. The alarm device generates the key using the key negotiation data in the confirmation data frame returned by the main control device receiving the keep-alive data frame. The present application can effectively solve the problems of missed alarm, false alarm and tampered alarm control information in the alarm system.