Lastly, Android OS inherits some security aspects from
the Linux which is built from. Two basic mechanisms are
inherited, the Portable Operating System interface
(POSIX) which creates sand boxing to protect different
applications from conflicting and interleaving with each
other. The second aspect is the file access which is the
well-known security access lists to manage the users and
files accessing and preventing an illegal accessing. The
Android is continuously updated by security mechanisms
such DEP started from V2.3 and ASLR from V4.