Wi-Fi can imprint passwords and PINs onto radio signals
Security researchers have devised a way of discovering passwords and other sensitive data by observing how bodily movements interfere with Wi-Fi signals.
The researchers from Shanghai Jaio Tong University, the University of Massachusetts at Boston, and the University of South Florida, found that they could find out private information by analysing the radio signal from a malicious Wi-Fi router.
According to a paper published by the researchers, a framework they set up, dubbed WindTalker, can enable a hacker to infer the sensitive keystrokes on a mobile device through Wi-Fi-based side-channel information. They said that keystrokes on mobile devices will lead to different hand coverage and the finger motions, which will introduce a unique interference to the multi-path signals and can be reflected by the channel state information (CSI).
