Network time synchronization method and system with traceability

Abstract

The invention relates to a traceability network time synchronization method and system, and each network time server in a server list traces to an atomic time mark national measurement reference, so that the time source of the network time server can be ensured to be credible. A group of network time servers traceable to an atomic time mark national measurement reference are used as time sources for network time synchronization of a client, an optimal network time server is screened out from the network time servers, and a credible network time server can be screened for the client by means of ensuring that the time sources of the network time servers are credible, so that the safety risk of time synchronization can be obviously reduced. In addition, the network time protocol is utilized to interact with each network time server in the server list, an optimal network time server can be screened out, an accurate and reliable network time server can be further obtained through screening, and the time synchronization result is high in precision.

Description

technical field [0001] The invention relates to the technical field of network time synchronization, in particular to a traceable network time synchronization method and system. Background technique [0002] With the increasing demand for high-precision time synchronization, and my country's future digital economy will develop in the direction of high quality, the requirements for time synchronization are getting higher and higher, and credible and reliable time sources are particularly important. Synchronization of terminal devices to untrustworthy network time servers or GPS (although the time obtained from GPS is highly accurate, but the source is not the time released by the national authority), it will imply a huge security risk, which will affect people's life, economy and society. development has serious implications. [0003] At present, a terminal (client) usually uses a Network Time Protocol (Network Time Protocol, NTP) to access a network time server, so as to perf...

AI Technical Summary

Problems solved by technology

However, my country's network time servers are widely distributed, and there are no fixed, credible and reliable sites. There are network time servers with public IP addresses in all industries and fields for time service, but obtaining time from a large number of network time servers with public IP addresses on the Internet cannot be guaranteed. Whether the time source of the network time server itself is traceable to the atomic time scale national measurement benchmark UTC (NIM), UTC (NIM) is the source of time and frequency values ​​in my country, and is the highest basis for unifying the national time and frequency values. If the network time server If the time comes from GPS or other untrusted and unknown time sources, such time synchronization results will be accompanied by huge security risks

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