Man-in-the-middle attack system and method for optical fiber time synchronization system
A time synchronization system and intermediary technology, applied in transmission systems, electrical components, etc., can solve problems such as security loopholes, and achieve the effect of strong effectiveness and strong concealment
Inactive Publication Date: 2021-02-26
NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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[0008] Aiming at the above-mentioned deficiencies in the prior art, a man-in-the-middle attack system and method for an optical fiber time synchronization system provided by the present invention solves the problem of some security loopholes in the optical fiber time synchronization system through link design and active compensation
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[0037] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.
[0038] The time interval counter (Time Interval Counter, TIC) obtains the transmission delay of the second pulse by measuring the time interval of the second pulse of the two channels, and is one of the core instruments of the optical fiber time synchronization system. Usually, in an optical fiber time synchronization system, the time interval counter is opened when the rising edge (or falling edge) of the second pulse sent ...
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The invention discloses a man-in-the-middle attack system and method for an optical fiber time synchronization system, and the system comprises a circulator 1, an attack unit, and a circulator 2, a port 2 of the circulator 1 and a port 2 of the circulator 2 are connected to the optical fiber time synchronization system through a transmission link, and the circulator 1 is close to a main end of theoptical fiber time synchronization system, and the circulator 2 is close to the slave end of the optical fiber time synchronization system. The attack method provided by the invention is provided forthe transmission link symmetry and the time interval counter counting principle in one compensation period of the optical fiber time synchronization system, and is different from the attack method based on network time synchronization systems such as NTP (Network Time Protocol) and the like, so that the attack method based on optical pulse waveform control provided by the invention is relativelystrong in pertinence.
Description
technical field [0001] The invention relates to the technical field of optical fiber time synchronization, in particular to a man-in-the-middle attack system and method for an optical fiber time synchronization system. Background technique [0002] Time is a vital parameter in a country's political, military, economic, technological and social life, and it is related to the security and stability of the country and society. Time synchronization is the process of transmitting the standard reference time of the master to the slave through the transmission medium, so that the slave can correct the local clock and realize the clock alignment and synchronization in the whole system. Existing time synchronization technologies include microwave timing, satellite timing, optical fiber timing and other methods. Among them, the time synchronization technology using optical fiber as the medium has the advantages of low transmission loss, anti-electromagnetic interference, and is not e...
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IPC IPC(8): H04L29/06
CPCH04L69/28
Inventor 张晨琳李扬徐兵杰黄伟
Owner NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP