Cloud computing is an emerging computing paradigm aimed at running services over the
internet to provide scalability and flexibility. The advantages in using the cloud for start‐up and
small businesses that lack infrastructure have been shown to far outweigh the disadvantages. Cloud
platform services, also known as Platform as a Service (PaaS), provide a computing platform or
solution stack on which software can be developed for later deployment in a cloud. However, there
are a number of security challenges because users of the cloud have to rely on third party
companies to provide confidentiality, integrity and availability. Geoprocessing is the manipulation
of geographic information, ranging from simple feature overlays and geocoding to raster processing
and advanced climate modelling. The Open Geospatial Consortium’s (OGC) Web Processing Service
(WPS) defines a standardized interface that facilitates the publishing of geospatial processes.
Parallelization and distribution of geoprocessing services have received much attention lately,
including running them in a cloud. However, work on the security aspects of geoprocessing in a
cloud is limited. In this paper, we anaylse security mechanisms and Service Level Agreements (SLA)
of PaaS clouds and present results of experiments run in the PaaS clouds. The implications of these
results for the development of geoprocessing services in a PaaS cloud are discussed. Finally,
recommendations for future work are presented.
Sewdass, Nisha(University of Pretoria, 2009-10-08)
Competitive Intelligence (CI) has become increasingly important for organisations in the private sector, or profit-making organisations, because the level and intensity of competition has increased in recent years. This ...
Conry, Jennifer Robyn(University of Pretoria, 2007-04-17)
This research study examined mothers’ experiences of gaining access to services following the death of a baby through stillbirth or a neonatal death. An exploratory research design was used to conduct applied research into ...
Roon, Selwin Jakobus Emiel(University of Pretoria, 2007-01-24)
An important goal of modern data networks is to support multiple applications over a single network infrastructure. The combination of data, voice, video and conference traffic, each requiring a unique Quality of Service ...