Nowadays, most of the companies are shifting from desktop PCs application to cloud based applications deployed on clouds to provide the effective services in the heterogeneous environments. But, in order to survive in such a cloud competitive market,

Cloud computing is one of the trending technologies that provide boundless virtualized resources to the internet users as an important services through the internet while providing the privacy and security. Using these cloud services, internet users get many parallel computing resources at low cost. It predicted that till 2016, revenues from the online business management spent $4 billion for data storage. Cloud is an open-source platform structure, so it is having more chances to malicious attacks. Privacy, confidentiality, and security of stored data are primary security challenges in cloud computing. In cloud computing, “virtualization” is one of the techniques dividing memory into different blocks. In most of the existing systems, there is only single authority in the system to provide the encrypted keys. To fill the few security issues, this paper proposed a novel authenticated trust security model for secure virtualization system to encrypt the files. The proposed security model achieves the following functions: (1) allotting the VM security monitor model for each virtual machine and (2) providing secret keys to encrypt and decrypt information by symmetric encryption.The contribution is a proposed architecture that provides a workable security that a cloud service provider can offer to its consumers. Detailed analysis and architecture design presented to elaborate security model.  

The COVID-19 corona virus has affected 81.9 million people with 1.79 million deaths in the entire world and has transformed into a global pandemic. The disease has effected 10.2 million people in India with about 148K deaths till December 2020. The COVID-19 virus is a highly infectious disease, which mainly spreads through the droplets generated by the cough, sneeze or exhale of an infected person. The disease spreads rapidly in crowded and poorly ventilated places. The virus quickly contaminates on floors and surfaces, people touching their eyes, nose and mouth after their contact with these contaminated surfaces get infected with this viral disease. As there is no cure and a vaccine currently for COVID-19, tracing, testing, tracking and treating are the most efficient tools to combat it. In order to track patients the existing methods implement fall detectors and routers which are effective in tracking patients in smaller areas. In order to overcome this drawback, a patient tracking technique COVID-Doctor (CODOC) has been proposed in this work which implements Global Positioning System (GPS) and multiple sensors to track patients in larger areas.