Due to most mobile devices use proprietary OSs and
the common and main competitors are iOS [10], Android
[11] and Microsoft [12] in the world. Therefore, we will
introduce not only the operating systems of smartphone but
also the platforms with corresponding application
development [13] in this section. Otherwise, the most
important in this paper's contribution: Spyware. We also
give a concerned work about it in this section. The most
important in this paper's contribution: Spyware, we present
how to extract the private and sensitive personal
information without authorization in this section.