Cloud computing is a fast growing technology offering a wide range of software and infrastructure services on a pay-per-use basis. Many small and medium businesses (SMB's) have adopted this utility based Computing Model as it contributes to reduced operational and capital expenditure. Though the resource sharing feature adopted by Cloud service providers (CSP's) enables the organizations to invest less on infrastructure, it also raises concerns about the security of data stored at CSP's premises. The fact that data is prone to get accessed by the insiders or by other customers sharing the storage space is a matter of concern. Regulating access to protected resources requires reliable and secure authentication mechanism, which assures that only authorized users are provided access to the services and resources offered by CSP. This paper proposes a strong two-factor authentication mechanism using password and mobile token. The proposed model provides Single Sign-on (SSO) functionality and does not require a password table. Besides introducing the authentication scheme, the proof of concept implementation is also provided.
The production of electrical energy from renewable energy resources has lead to the development of the microgrid. One of the major power quality issue associated with the operation of these microgrids are the phase voltage unbalancing caused by single phase or unbalanced loads connected to it. All the existing technologies demands the use of an external element for the purpose of mitigating these unbalances by the application of complex controllers. In order to overcome this drawback here we come across a new inverter topology where the three phase compact unit interfacing inverter is rebuilt in the form of three single phase inverter units. Each of these are controlled independently to achieve microgrid phase voltage balancing. The distributed generation's active and reactive power will be divided among the inverter phases with different ratios in accordance to an algorithm verifying the micro grid phase voltage balancing. In the proposed model a modification to the old inverter is given to implement the new inverter control. The proposed inverter control is very simple and highly economical attractive.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.