Cloud Computing

  Cloud computing is a technology that enables its users to access   and store data on a server over an Internet connection without   buying physical storage servers. 


Cloud computing is a technology that enables its users to access and store data on a server over an Internet connection without buying physical storage servers.

A constantly increasing demand for data storage requires more and more storage capacity. Instead of buying physical data servers, cloud computing allows you to rent the capacity you need without buying a physical device by simply uploading data over the Internet.

Cloud computing offers many advantages over traditional computing. By storing, accessing and processing data outside the company’s server rooms in central, so-called “server farms”, companies avoid all costs for the IT infrastructure and pay only for the data storage itself. This business model is bundled into three service models: Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS). IaaS is the basic principle of cloud services that provides the computing infrastructure while the user remains fully responsible for controlling the leased service. PaaS as an upgrade from IaaS provides a platform with the server capacity necessary to run the applications the user selects and controls.

 SaaS is the most advanced service and provides a complete-software system where a user can interact (e.g. online mail-platforms) but cannot manage or change the cloud infrastructure.

With three different deployment models, the service models described above can be offered, which differ particularly in terms of cloud access. Private clouds are operated exclusively for individual companies and offer a higher degree of control, but also require a high degree of commitment to the allocation of space, hardware, etc. Public clouds offer their hardware and software resources online to everyone on a pay-as-you-go model that simplifies access and requires no setup. Hybrid clouds are a mix of private and public clouds from different vendors with the advantage that enterprises can store sensitive data in a private cloud while openly communicating with their environment in a public cloud.

Cloud computing user numbers have risen sharply in recent years, affecting businesses, organizations and consumers alike. While companies want to reduce the costs of IT architecture, private users use the cloud to securely store their personal data, which they can access at any time via any Internet-enabled device.


The storage of data in a cloud always leads to a discussion about data security. Since data is stored in a public cloud, it is possible to access data by hacking passwords or user names, which is why data security is becoming an increasingly important issue. With the right security mechanisms and confidence in cloud computing, this new technology will be a major change for both industries and consumers as it completely changes the way we store and access our data.

Literature: Sirivansan (2014): Fundamentals of Cloud Computing. Heidelberg, Springer