Abstract

In the current global satellite communication field, the main components of satellite communication are transponders. The types of transponders are used in different communication systems. Due to the preciousness and insufficiency of the power on the satellites, the devices traditionally used on the ground cannot be completed. The application to the satellite, and due to certain characteristics of the satellite, such as the failure to change the hardware equipment after the launch,the traditional system maintenance can not meet the needs of satellite communications.

Therefore, the satellite transponder contains a large number of "pent-pipe" payload that have been left to date and are being manufactured. This type of load has been widely used in satellite systems. This topic will discuss the principles and defects of this load, including this. Some technical parameters and frequency information commonly used in class load, for this load, the attacker can easily achieve interference, forgery, eavesdropping and other attack means for satellite communication, posing a great threat to the communication data.

At the same time, as a necessary device for satellite communications: modems, after research found that some of the world's most widely used brands - Comtech's modem, there are loopholes in the device's remote control function, which will allow illegal users to falsify control information The normal satellite communication link is shutdown. This issue will show the attack video of this attack and the effect on data forgery. This vulnerability was first disclosed in a meeting.And this vulnerability does not only exist in the combech brand.