Last month, the news that Russia pulled the network line, everyone should have heard about it.
Here's the thing, for some reason that everyone knows, Russia felt very dangerous and finally decided to break off diplomatic relations with the global Internet and only use its own Internet Runet.
And this news has aroused the long-hidden question in the editor's heart: after pulling the network cable, can the computer still be stolen and controlled?
In many people's cognition, the computer disconnects from the network, hackers can not invade your computer, naturally can not steal data and control systems.
At the same time, there are a lot of messages saying that some places where the level of security is strict.
For example, confidential networks, banking networks, and power systems will also choose to isolate the Internet to ensure information security.
In our film and television works, we have not seen that the bad guys want to hack into the isolated computer, and they can only sneak in first, and then steal data through USB and other ports.
However, the facts tell us: man, you can't take it for granted!
In fact, Dr. Ben Moldchai Guri in Israel has studied ways to change the brightness level of computer screens and extract data.
By encoding sensitive information as a "stream of bytes," this malware reduces the size and modulates brightness on the screen, and the human eye has no way of detecting the changes.
Once a computer is infected with malware, it can steal data even if it goes off the Internet.
To put it simply, after the computer is disconnected, the channel for the magic attack of the network is gone, but there are still physical attacks.
At present, there are 4 disconnection attack methods: Bluetooth, electromagnetic radiation, sound waves and optical signals.
For specific cases, you can search for the above-mentioned Israeli Dr. Ben Moldechai Guri, who has conducted many experiments in this area.
Therefore, don't say that as long as the computer is not connected to the Internet, the data cannot be stolen and it is easy to be punched in the face.
In a word, no matter how strong the technology is, it is also researched by people.