In cloud computing, the service provider has access to data as much as you do. It can be misused by the provider. Even Apple co-founder Steve Wozniak has expressed his concerns over cloud computing.
He said, “I want to feel that I own things. A lot of people feel, ‘Oh, everything is really on my computer,’ but I say the more we transfer everything onto the web, onto the cloud, the less we’re going to have control over it.”
The terms for data confidentiality should be quoted loud and clear in the service agreement.