Ann is an employee in the accounting department and would like to work on files from her home
computer. She recently heard about a new personal cloud storage service with an easy web interface.Before uploading her work related files into the cloud for access, which of the following is the MOST
important security concern Ann should be aware of?

A.
Size of the files

B.
Availability of the files

C.
Accessibility of the files from her mobile device

D.
Sensitivity of the files

Explanation:
Cloud computing has privacy concerns, regulation compliance difficulties, use of open-/closed-source
solutions, and adoption of open standards. It is also unsure whether cloud-based data is actually secured
(or even securable).
Incorrect Answers:
A: Because the files are not locally stored, size should not be an issue.
B: Availability of the files is not a security concern as the files will be available wherever Anne is able to
access the internet.
C: Accessibility of the files from Ann’s mobile device is not a security concern if her mobile device has
internet access.

Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, p. 37