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Synchronized method and device of encrypted messages between each other

A time synchronization and message technology, which is applied to synchronization devices, transmission systems, digital transmission systems, etc., can solve the problems of processing delay and reduce the accuracy of time synchronization, high cost, and low time synchronization accuracy, so as to reduce costs and reduce Achieving the effect of complexity and simplified processing

Inactive Publication Date: 2013-05-22
ZTE CORP
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AI Technical Summary

Problems solved by technology

Due to the limitations of the software timing itself, the first method results in low time synchronization accuracy; the second method has data security and is not suitable for the scenario of synchronous message encryption; the third method is costly, and the encryption and decryption process introduces Processing delays reduce the accuracy of time synchronization
[0007] In addition, some methods have been proposed to determine the receiving time of the encrypted synchronization message, but these methods can only solve the clock synchronization problem between the master and slave clocks, and cannot achieve time synchronization

Method used

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  • Synchronized method and device of encrypted messages between each other
  • Synchronized method and device of encrypted messages between each other
  • Synchronized method and device of encrypted messages between each other

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Embodiment Construction

[0047] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0048] figure 2 It is a flowchart of a time synchronization method for inter-transmission of encrypted messages provided by the present invention, such as figure 2 shown, including the following steps:

[0049] Step S201: When sending a message, generate a first sending timestamp t3 corresponding to the time of sending the message on the encrypted corresponding message according to the indication of whether to add a time stamp determined based on the content of the message before encryption;

[0050] Step S202: When receiving a message, generate a first receiving time stamp t2 corresponding to the time of receiving the message on all received messages,...

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Abstract

The invention discloses a synchronized method and device of encrypted messages between each other, and relates to the field of digital information transmission. The method includes steps of determining whether to stamp an indicating signage of time according to a message content before being encrypted, and generating a first sending time stamp t3 corresponding to a message sending time at the corresponding encrypted message while sending a message; generating a first receiving time stamp t2 corresponding to a message receiving time at the received message, and deciphering the received encrypted message while receiving the message; performing time synchronization by using the first sending time stamp t3, the first receiving time stamp t2 and a second receiving time stamp t4 of the corresponding encrypted message received by a master clock node and a second sending time stamp t1 of sending the message. The synchronized method and device of encrypted messages improves time synchronization accuracy of master and slave clock nodes on the premise of guaranteeing data network security.

Description

technical field [0001] The invention relates to the field of digital information transmission, in particular to a time synchronization method and device for mutual transmission of encrypted messages. Background technique [0002] In packet-switched systems for the transmission of digital information, high precision requirements for time synchronization are imposed by its components. The time generators of these components often exchange time-stamped data packets with each other via the asynchronous network or are synchronized by means of a reference time generator which is accessible via the asynchronous network. [0003] The time synchronization protocols based on Internet protocol IP (IP: Internet Protocol) message exchange include the so-called precision time protocol PTP (PTP: Precision Time Protocol), network time protocol NTP (NTP: Network time Protocol) and the derived non- Publicly known agreements, etc. [0004] Taking the PTP protocol as an example, messages are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L7/00
Inventor 龚翠玲邱文才傅小明
Owner ZTE CORP
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