Clock calibration method and network security protection method and device based on clock synchronization

Abstract

The invention relates to the technical field of security monitoring, and provides a clock calibration method and a network security protection method and device based on clock synchronization. The clock calibration method comprises the following steps: sending a heartbeat request to a server, recording request sending time of the heartbeat request, receiving a heartbeat request response message which is fed back by the server and carries request receiving server time for receiving the heartbeat request, and recording message receiving time; and if time deviation between the request sending time and the message receiving time is less than or equal to preset time deviation, determining a clock error relative to the server, and calibrating a local clock according to the clock error. By adopting the method, clock calibration efficiency can be improved. The network security protection method based on clock synchronization comprises the following steps: receiving a heartbeat request which is sent by a user terminal and carries request initiation time, recording request receiving time, and filtering the heartbeat request in which the time deviation between the request initiation time and the request receiving time exceeds the preset time deviation. The method can realize efficient network protection.

Description

technical field [0001] The present application relates to the technical field of security monitoring, in particular to a clock calibration method, device, computer equipment and storage medium, and a clock synchronization-based network security protection method, device, computer equipment and storage medium. Background technique [0002] With the rapid development of Internet technology, more and more businesses are connected to the Internet, and various smart devices have been launched, such as ticket issuing machines for movie theaters. However, these devices are directly connected to the public network with poor network security, and are easy to be hijacked when making a request. In order to ensure the reliability of the request, it is necessary to ensure that the clocks between the client and the server are kept synchronized so that the clock error is kept within a reasonable error range. [0003] At present, the commonly used method to solve network clock synchronizat...

AI Technical Summary

Problems solved by technology

However, this method relies on the server's support for NTP, so if the server does not provide NTP support, this method cannot obtain the clock error between the client and the server

The current clock calibration method based on the HTTP protocol is to send two HTTP requests to the target host at intervals of a time interval by the local host, record the sending time of the local host, the time of receiving the response and the time of the target host sending the response respectively, and calculate the network time. Delay, calculate the second-level error according to the network delay, and then reduce the error through multiple requests. In this way, the process is complicated and time-consuming, making clock calibration inefficient

[0004] Based on this, the current clock calibration method has the problem of low clock calibration efficiency, which makes it impossible to achieve efficient network security protection

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