Cloud security is one of most important issues that has attracted a lot of research and development effort in past few years. Particularly, attackers can explore vulnerabilities of a cloud system and compromise virtual machines to deploy further large-scale Distributed Denialof-Service(DDoS). DDoS attacks usually involve early stage actions such as multi-step exploitation, low frequency vulnera...

One of the main features of High Throughput Computing systems is the availability of high power processing resources. Cloud Computing systems can offer these features through concepts like Pay-Per-Use and Quality of Service (QoS) over the Internet. Many applications in Cloud computing are represented by workflows. Quality of Service is one of the most important challenges in the context of sche...

Cloud Computing is a promising computing paradigm that provides flexible, Internet-accessible resources allocation on demand on a pay-as-you-go basis. With the growth and expansion of Cloud services and participation of various services providers, the description of quality parameters and measurement units started to diverse and sometimes contradict. Such ambiguity does not only result in the r...

Cloud computing environments facilitate applications by providing virtualized resources that can be provisioned dynamically. The advent of Cloud computing as a new model of service provisioning in distributed systems, encourages researchers to investigate its benefits and drawbacks in executing scientific applications such as workflows. There are a mass of researches on the issue of scheduling ...

---------------------------------------------------------------------***--------------------------------------------------------------------Abstract— Cloud computing is the latest computing paradigm that de-livers hardware and software resources as virtualized services in which users are free from the burden of worrying about the low-level system administration details. Migrating Web applicatio...

Cloud computing is an emerging internetbased paradigm of rendering services on payas -per -use basis. Increasing growth of cloud service providers and services creates the need to provide a tool for retrieval of the high-quality optimal cloud services composition with relevance to the user priorities. Quality of Service rankings provides valuable information for making optimal cloud service sel...

Cloud brokers are the indispensable components in multi cloud environment for seamless provisioning of services to the consumers. QoS based service discovery and selection is the area of contribution of this paper. The main challenge encountered here is to reduce the multi objective multi constraint optimization problem into a singular one as well as efficiently maintianing of the QoSs of the s...

The increasing amount of information and the growth of information technology paved the way for internet users to perform their desired task without spending more on the resources using cloud computing. The cloud provides various services at different level of architecture like service layer, platform layer and database layer. To access these services the users has to be registered and could ac...

Cloud federation systems have recently emerged as a scalable delivery model that interconnects services from two or more cloud providers for load balancing and accommodating spikes in demand. One challenge in this delivery model is the complexity of service selection due to the heterogeneity of cloud service descriptions among cloud federations. To overcome this complexity, it is crucial to uni...

With the rapid development and integration of the Internet, wireless communication network and the Internet of Things, the Internet faces many challenges as a bearer network: a large volume of information exchange, multi-level QoS and smoothly switching multiple access protocols. The Internet should be able to provide a variety of network capacities in a more dynamic and on-demand way, not just...