Faculty Publications
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Item Distributed Access Control in Cloud Computing Systems(wiley, 2016) Chandrasekaran, K.; Thomas, M.V.With the tremendous increase in the number of distributed applications, the issue of distributed access control has become an important research topic for both academia and industry. In distributed computing environments like cloud computing or service computing, authentication and authorization are the two important functions to be performed, to make sure that unauthorized users do not access distributed system components. An effective access control mechanism is an essential security component as far as protecting the confidentiality, integrity, and availability (CIA) of information hosted in the cloud is concerned. An effective access control mechanism implemented in the cloud domain should be scalable, reliable, and robust and it should provide required features and procedures for identity provisioning, deprovisioning, authentication, authorization, accounting, and auditing. In this chapter, we discuss the issue of distributed access control, major features and functionalities, access control policies and models, distributed access control architecture for multicloud environments, trust, and identity management in cloud computing environments. Related work shows some of the major research activities in the area of distributed access control considering the advantages and disadvantages of the approaches that have been adopted. We conclude this chapter by discussing a few research issues in the area of distributed access control in the cloud environment. © 2016 John Wiley & Sons, Ltd.Item An efficient game-theoretic approach for resource management in Cloud Federation(Institute of Electrical and Electronics Engineers Inc., 2016) Thakur, P.K.; Thomas, M.V.; Chandrasekaran, K.Cloud Federation is an emerging technology for the effective utilization of cloud resources. Effective management of resources is very much required in order to increase the profits of individual CSPs in the federation. Hence, it is of crucial business value for a cloud provider to develop an effective mechanism so that the resource management is efficient in the cloud federation scope. In this paper, we discuss the design and development of game-theoretic approach for the resource management mechanism also considering the trust values between the participating CSPs in the federation. We have discussed and analysed the performance of both the co-operative and non co-operative approaches for the resource allocation. © 2015 IEEE.Item An efficient trust-based Game-Theoretic approach for Cloud Federation Formation(Institute of Electrical and Electronics Engineers Inc., 2016) Dhole, A.; Thomas, M.V.; Chandrasekaran, K.Cloud Federation or a Coalition of Cloud Service Providers (CSPs) is a hot topic nowadays in the industry as well as academia. Cloud Federation was introduced to overcome the realistic limited amount of resources available from a single CSP so that the CSPs may not lose its customers due to the unavailability of resources. But its a challenge to form a Cloud Federation which is stable, reliable and fair in terms of payoff to the CSPs that are part of the Cloud Federation. In this paper, we propose to find a solution to the Cloud Federation formation by following a game-theoretic approach considering the trust between the participating CSPs. This technique will also allow the CSPs to take decision unilaterally based on their own decisions depending on the profit they would receive upon inclusion into the federation. Our approach takes into consideration the trust between the CSPs taking part in the Cloud Federation Formation process. The Game-Theoretic approach used in our approach makes use of a simple Cloud Federation Formation policy which ensures stability and fairness in the Cloud Federation. © 2016 IEEE.Item Dynamic partner selection in Cloud Federation for ensuring the quality of service for cloud consumers(World Scientific Publishing Co. Pte Ltd wspc@wspc.com.sg, 2017) Thomas, M.V.; Chandrasekaran, K.Cloud Computing has become the popular paradigm for accessing the various scalable and on-demand computing services over the internet. Nowadays, individual Cloud Service Providers (CSPs) offering specialized services to the customers collaborate to form the Cloud Federation, in order to reap the real benefits of Cloud Computing. By collaboration, the member CSPs of the federation achieve better resource utilization and Quality of Service (QoS), thereby increasing their business prospects. When a CSP runs out of resources in the Cloud Federation, in order to offload the customer requests for resources to other CSP(s), identifying a suitable partner is a challenging task due to the lack of global coordination among them. In this paper, we propose the design and implementation of an efficient partner selection mechanism in the Cloud Federation, using the Analytic Hierarchy Process (AHP) and the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) methods, and also considering the trust values of various CSPs in the federation. The AHP method is used to calculate the weights of the QoS parameters used in the TOPSIS method which is used to rank the various CSPs in the Cloud Federation according to the user requirements. Simulation results show the effectiveness of this approach in order to efficiently select the trustworthy partners in large scale federations to ensure the required QoS to the cloud consumers. © 2017 World Scientific Publishing Company.