Now you see me, now you don't: protecting smartphone authentication from shoulder surfers
In this paper, we present XSide, an authentication mechanism that uses the front and the back of smartphones to enter stroke-based passwords. Users can switch sides during input to minimize the risk of shoulder surfing. We performed a user study (n = 32) to explore how switching sides during authentication affects usability and security of the system. The results indicate that switching the sides increases security while authentication speed stays relatively fast (≤ 4 seconds). The paper furthermore provides insights on accuracy of eyes-free input (as used in XSide) and shows how 3D printed prototype cases can improve the back-of-device interaction experience.
Recently, a lot of mobile devices spread rapidly. However, an issue of the battery of the mobile device appeared because the capacity of the battery limits usage time of the mobile device. Therefore, some mobile devices are installed with photovoltaic modules but the photovoltaic module is easily breakdown. Because consumers want to know the breakdown, the diagnostic method focused on mobile device is needed. In this paper, a fault diagnostic method of photovoltaic modules on mobile device is implemented and the algorithm is proposed. The proposed method has high accuracy for diagnostic photovoltaic.