Method and device for secure transmission of network time synchronization message
A technology for synchronizing messages and network time, which is applied in the field of information security and can solve problems such as security that needs to be improved
Active Publication Date: 2021-09-17
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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Problems solved by technology
However, the security of network timing needs to be improved. Therefore, how to improve the security of network timing has become a hot topic of current research.
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[0047] The invention provides a method and device for secure transmission of network time synchronization messages to improve the security of network time service.
[0048] The transmission means described above distinguish between sender and receiver.
[0049] The current network timing (network time synchronization) protocols include NTP and PTP. In the NTP protocol, the most commonly used working mode is the client / server mode. In this mode, one system contains several time servers. Further, the time server can be divided into 16 levels according to performance and accuracy, and level 1 corresponds to the main server; the larger the level number, the worse the performance and lower the accuracy of the time server located in this level. The upper-level server can perform time service to the lower-level servers as clients. After the time service is completed, the time of the lower-level server (secondary server) will be synchronized to the upper-level server. That is to sa...
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A method and device for secure transmission of network time synchronization messages, so as to improve the security of network time service. In the above method, the secret information bit positions of the first codeword sequence (that is, the polar-encoded time synchronization message generated by the sender) carry encoded secret data. The channel capacity of the bit position of the secret information tends to 1 in the legal channel, and tends to 0 in the illegal channel, that is, the bit at the bit position of the secret information can realize error-free transmission in the legal channel, but in the illegal channel Unable to transmit reliably. Therefore, if the time synchronization message is intercepted and forwarded by an attacker through an illegal channel, the secret data will not be reliably transmitted, and its bit error rate will increase. It can be judged whether it is transmitted through an illegal channel based on the bit error rate. In addition, the attacker cannot correctly estimate the secret data and cannot effectively tamper with it. This increases safety.
Description
technical field [0001] The invention relates to the field of information security, in particular to a method and device for secure transmission of network time synchronization messages. Background technique [0002] Network timing refers to the technology of using the network as a medium to synchronize the time of computers or instruments connected to the network through message interaction. However, the security of network timing needs to be improved. Therefore, how to improve the security of network timing has become a hot research topic at present. Contents of the invention [0003] In view of this, the present invention provides a method and device for secure transmission of network time synchronization messages, so as to improve the security of network time service. [0004] In order to achieve the above-mentioned purpose of the invention, the present invention provides the following technical solutions: [0005] A method for securely transmitting a network time syn...
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IPC IPC(8): H04L9/08H04L9/32H04J3/06
CPCH04J3/0667H04L9/0861H04L9/3297
Inventor 何婷郑勇马哲锐
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU