  The increasingly rapid use of mobile devices for data transaction around the
world has consequently led to a new problem, and that is, how to engage in
mobile data transactions while maintaining an acceptable level of data privacy
and security. While most mobile devices engage in data transactions through a
data cloud or a set of data servers, it is still possible to apply data
confidentiality across data servers, and, as such, preserving privacy in any
mobile data transaction. Yet still, it is essential that a review of data
privacy, data utility, the techniques, and methodologies employed in the data
privacy process, is done, as the underlying data privacy principles remain the
same. In this paper, as a contribution, we present a review of data privacy
essentials that are fundamental in delivering any appropriate analysis and
specific methodology implementation for various data privacy needs in mobile
data transactions and computation.
