While the virtual machines cut costs and save energy, they also raise questions about data leakage as well as whether a customer would ever find out files have been breached, said Jim Reavis, executive director of Cloud Security Alliance, a non-profit advocated for cloud security standards.
The WSJ tested out over 100 Android and iPhone applications to see what kind of data leakage was happening, and has a fun interactive graphic showing which apps leak what information.