Cloud Computing and Security and Privacy
– By The Trigent Team
There are three distinct cloud service delivery models: 1. Software-as-a-Service (SaaS), 2. Platform-as-a Service (PaaS) and 3. Infrastructure-as-a-Service (IaaS). These three models are distinct, at different stages
in their maturity lifecycle and have different security ramifications. For example, SaaS is the oldest, most
mature, secure and stable model and has been around since 1999. Salesforce.com is the founder of and
leader of the SaaS model. PaaS is the next most mature and stable delivery model. One of the “pure play”
PaaS providers is OpSource which has been in business since 2002. Many of the PaaS provides such as
Rackspace have been around for quite some time and were previously known as ASPs or MSPs. The IaaS
delivery model is much more recent and major entrants include Amazon, Microsoft, IBM and Google.
Amazon is the most established cloud entrant, however, their Elastic Compute Cloud (EC2) service has only
been generally available in the market since 2008.