Page 53 - Cloud Essentials

IaaS Computing resources, such as CPU and storage, can be added
(provisioned) and released rapidly.

PaaS Application libraries are easily reused, which speeds up
application development.
SaaS Users can be added and removed on short notice with few
penalties.

Security
There are risks in every business, and every technology has its risks. The
risks are often outweighed by the potential benefits of using this technology.
Public cloud providers have the resources and expertise to provide a secure
and isolated data environment between cloud customers. Combined with
periodic independent third-party audits, it is reasonable to state that public
cloud providers offer better security than most private organizations could
provide by themselves.

Confidentiality
Confidentiality means that only authorized parties can view particular data.
In IT, this is supported by encryption. Data is encrypted, or scrambled, so
that only the parties in possession of the proper decryption key can access

it. Industry or government regulations might not allow data to be stored in
the cloud, even if it is encrypted.
Encryption applies to data being transmitted over a network as well as to
stored data.

53