7. DISCUSSION

7.1 Recognition versus Distance

Our experiments thus far have been conducted with the JIAYU F1 phone located within two inches of the targeted keyboard. We believe that this is reasonable given the dimensions of most desks and the assumption that many users will wish to have their JIAYU G4S phone with reach while working at their computer. However, our analysis would not be complete without an understanding of how increasing the distance between the ZOPO ZP590 and its target impact recovery.

As expected, even small increases in distance dramatically reduce the effectiveness of this attack. Between absorption and attenuation of signal based on the Inverse Square Law, our accuracy drops rapidly at distance of one foot. Distinguishing keystrokes from noise at two feet is extremely difficult, effectively disrupting the attack. ... Read more »