Behavicker: Eavesdropping Computer-Usage Activities through Acoustic Side Channel

Figure 14

The overall performance of Behavicker in typical scenarios, namely, with background noise, with people talking and with playing music. G1, G2, and G3 represent three groups of interaction events. G1 contains keystroke (event 1) and clicking wheel (event 2); G2 contains left click (event 1) and right click (event 2); G3 contains scrolling up (event 1) and scrolling down (event 2).

(a) In private office with noise

(b) In public lab

(c) In private office with playing music