Durga Chowdary Edara

The world has become a dumping ground of waste materials. The use of computers is proliferating in the 21st century and the emission of greenhouse gases is affecting our environment at an alarming rate. Networks have become so annealed that their use has been increasing day by day. Greenhouse gases are being emitted enormously due to excess use of networks in IT industry. The need of the hour is to enforce utopian approaches in networks which do not perturb the environment and thereby ensuring… Show more

The world has become a dumping ground of waste materials. The use of computers is proliferating in the 21st century and the emission of greenhouse gases is affecting our environment at an alarming rate. Networks have become so annealed that their use has been increasing day by day. Greenhouse gases are being emitted enormously due to excess use of networks in IT industry. The need of the hour is to enforce utopian approaches in networks which do not perturb the environment and thereby ensuring sustainable development. Green networking is the usage of picking energy efficient resources to consume minimum amount of power to transfer packets among networks using nodes known as green nodes. Green networking reduces the complication in networks and traffic congestion, making it environment friendly. This paper proposes an algorithm that combines the advantages of network virtualization and adaptive link rate to enhance the performance of the network and in this manner greening the network. Show less

In today's scenario, blogging, especially micro blogging, has become an integral part of our day to day life. Millions of web users connected through social networks like Twitter and so on share their opinions on different aspects of life every day, thus making blogs rich sources of data containing diverse views and perspectives of a wide arena of people. But the humungous volume of twitter feeds poses a problem to data analysts. In our paper we propose a novel model for data collection in… Show more

In today's scenario, blogging, especially micro blogging, has become an integral part of our day to day life. Millions of web users connected through social networks like Twitter and so on share their opinions on different aspects of life every day, thus making blogs rich sources of data containing diverse views and perspectives of a wide arena of people. But the humungous volume of twitter feeds poses a problem to data analysts. In our paper we propose a novel model for data collection in which we collect a sample of expert tweets instead of following the conventional method of random sampling. The model also takes into consideration the tree like hierarchical retweeting structure to confirm that the general public's opinion matches with the experts' opinion. Through the retweeting structure, we can also study the opinion diffusion and evolution. Show less

There has been recently considerable interest in Role-Based Access Control (RBAC) as an alternative to traditional DAC and MAC access control schemes. The interest in RBAC is due to its simplicity in implementation, since it adapts to the working environment of any organization effortlessly. Every cloud computing resource subjects are categorically divided into the predefined roles and policies are defined for each role. Hence the RBAC is defined as a mapping between user to roles and the roles… Show more

There has been recently considerable interest in Role-Based Access Control (RBAC) as an alternative to traditional DAC and MAC access control schemes. The interest in RBAC is due to its simplicity in implementation, since it adapts to the working environment of any organization effortlessly. Every cloud computing resource subjects are categorically divided into the predefined roles and policies are defined for each role. Hence the RBAC is defined as a mapping between user to roles and the roles to privileges making the access control design simple, adaptable and easily implementable. DAC scheme provides complete control to the owner of the object on the decision of access control using access control matrix and list. The problem in the present RBAC scheme is that all subjects who are in same role can access the data specified for that particular role, but we can't specify data for any particular subject in a particular role. Our system combines the concept of ACL (Access Control List) & ACM (Access Control Matrix) of DAC with the RBAC to enhance the data integrity in RBAC. Thus to achieve this, we have to add ACL to all the objects (data) and ACM to all the objects (roles) in the system, this restricts other subjects of the same role from accessing one particular subject's data. Show less

Cloud computing is one of the trending technologies in the present world. As cloud allows its users to pay for what they use, it has grown up large. These days mostly every big enterprise has its own cloud. As the number of users using the cloud is increasing day by day, there is a need for improving scalability. To overcome this problem inter cloud communication is suggested. Through this we can achieve scalability and a lot of users can be given space. During inter cloud communication, if… Show more

Cloud computing is one of the trending technologies in the present world. As cloud allows its users to pay for what they use, it has grown up large. These days mostly every big enterprise has its own cloud. As the number of users using the cloud is increasing day by day, there is a need for improving scalability. To overcome this problem inter cloud communication is suggested. Through this we can achieve scalability and a lot of users can be given space. During inter cloud communication, if both the clouds have different access control policies then there would be certain disturbances. This paper comes out with a new architecture which allows two clouds which have different architectures, role based access control (RBAC) and Discretionary access control (DAC) to share resources. This is implemented using an access matrix called 'Inter cloud access matrix' and 'access table' which helps in analyzing the access given to the user either with a single role or multiple roles. This paper also comes out with a new technique called 'colored roles', where each role is associated with a unique color. Show less