Security without networking, physical isolation? Computer cooling fan can also be used to steal data-network security, Trojans, fan-IT news

IT information at a time when many users believed that without networking, namely physical separation cases, your computer's data is absolutely safe, because as long as you don't have a USB drive smarter, who seemingly can't hack. Even u-virus accidentally infected, not connected to it also makes computer data God? '

Really ... ... Already there are a number of studies have shown that physical separation cases, uses electromagnetic radiation, radiation and other methods can be used to steal computer system data. Now there are more "bizarre" approach, Israel Ben-Gurion Fansmitter University researchers developed a malicious program, to let the infected computer's cooling fan to "tip off". Principle is that the program takes over after the fan control, allowing fans to reflect information about binary 0 and 1, which lets fans in turn send binary content, express to steal data.

These data can be expressed by CPU, video card, and the chassis fan, signal propagation ranges between 1 to 4 meters, malicious individuals can be placed within valid range receivers, such as spy equipment such as microphones, microphone, or use mobile phones to receive signals. Therefore, this approach may be best suited for intelligence agents.

不联网、物理隔离就安全？电脑散热风扇也能用来窃取数据 - 网络安全,木马,风扇 - IT资讯

IT资讯讯 曾几何时，很多用户都以为不联网，也就是物理隔离情况下，自己电脑中的数据就绝对安全，因为只要你不用U盘神马的，貌似谁都没办法入侵电脑。就算是不小心被U盘病毒感染，不联网它还能让电脑的数据上天不成？

还真能……此前已经有多项研究表明，物理隔离情况下，使用电磁辐射、热辐射等方式都可以用来窃取电脑系统数据。现在还有更“诡异”的方式，以色列Ben-Gurion大学的研究人员研发了恶意程序Fansmitter，能够让被感染电脑主机的散热风扇来“通风报信”。原理就是该程序接管风扇控制权后，让风扇转动能够体现二进制0和1的信息，从而让风扇在转动中发送二进制内容，表达要窃取的数据。

这些数据可以靠CPU、显卡和机箱风扇来表达，信号传播范围在1至4米之间，别有用心的人可以在有效范围内安放接收装置，例如麦克风、窃听器等间谍设备，或者用手机来接收信号。所以，这种方式可能最适合谍报人员。