Android's security mechanism is mainly reflected in two
aspects: Android system security and data security. Android
system security is referred to the protection of smart terminal
itself to operating system. It can prevent unauthorized user
external access and authorized service permission. It
includes users' behaviour detection, operating authority and
other measures. The data security is referred to ensure the
integrity and legitimacy of stored data, it requires the system
can properly transmit data, the authorization process
successfully read data.