A Brief Overview of Problems Addressed in My PhD Thesis “Resource Provisioning under Uncertainty in Cloud Computing”

This post gives an overview of my thesis titled Resource Provisioning under Uncertainty in Cloud Computing which was submitted to the Nanyang Technological University (NTU) in fulfillment of the requirement for my PhD degree in 2013. Specifically, this post mainly presents research challenges addressed in my PhD thesis in layman’s terms and gives a brief introduction of my PhD research contributions.

When pursuing the PhD, I mainly focused on a problem of resource provisioning in cloud computing where cloud computing resources can be provisioned from cloud service providers (CSP) to cloud consumers (i.e. cloud users, cloud customers) through two provisioning options, namely  on-demand option (which is also called pay-per-use/pay-as-you-go option) and reservation option. The reservation option is cheaper and able to guarantee prices and capacities of resources. However, a cloud consumer has to make upfront payment for the reserved resources. Due to uncertainties, the common problems encountered in resource provisioning with the reservation option are overprovisioning and underprovisioning.

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When Context-aware Computing Meets Mobile Security

People increasingly use mobile devices to access the Internet. An InternetNZ-funded survey conducted by CROW in 2015 shows that 54.6% of New Zealand mobile users tend to own more than one mobile device and more than 46.4% of them usually use Internet-connected applications on their mobile devices such as social networking (40.7%), Internet browsing (29.9%), and emailing (26.9%). While cyber space and the digital world orbit faster than the Earth, new security threats targeting mobile devices emerge. A security policy has to be well planned to deal with the threats. In this article, I would like to introduce a mobile security solution based on context-aware computing for refining a security policy to adapt to the world-wide-wild cyber space.

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