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If you ask three organizations how they are using the Cloud, you will
get (at least) three answers. One may be considering using Google Apps
for email, to avoid asking an admin to reboot mail servers at 4am to
clear an email backlog. Another may be considering using Terramark or
Amazon EC2 to spin up compute power to run processor-intensive work
(like DNA sequencing, let's say). Another may be considering using
Amazon's S3 as external storage. Here is where the *aaS model comes to
the rescue. Cloud usage fits relatively neatly into the different
categorizations of SaaS, PaaS, and IaaS.
Using this categorization, I recently wrote a cloud
security introduction for CSO Magazine which uses these categories:
SaaS, PaaS, and IaaS, to show how security applies differently in each
Check it out...
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