Optional schemes for video encryption in training courses include online encryption (for example, binding can only be played on a certain website), offline encryption with one machine and one code (both offline verification and online verification are acceptable) and so on. Of course, in addition to these, you need to add some watermarks, the number of hardware authorized to play, the number and time of playing, and so on. Generally speaking, if you do this, the security will be very good. Of course, there are also some measures that can be used to record the screen, such as horse racing (students' personal information appears to prevent disclosure, and even if it is disclosed, the source can be found through legal means), and answering questions in the middle (only by answering the correct video can we continue). Of course, there are other better ideas that can be customized.

As for the difference between the offline version and the online version, in fact, the biggest difference is whether it is necessary to connect to the Internet when using the activation code for the first time. Online mode if necessary. If you want, it is offline mode without networking.

Off-line one machine and one yard can also be made into EXE files and packaged directly to video buyers, which can be used after being directly installed and activated, and there is no need to connect to the Internet during viewing. This method is very suitable for winter and summer vacations or short courses.

One-machine-one-code training video encryption on the Internet also means that the video must be networked when the activation code is used for the first time, and then whether it needs to be networked or not can be determined as required. There is also a kind that must be watched online, such as on the website, which must be networked.