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Mobile Cloud Computing is an emerging technology in IT world. With the increasing demand of mobile users in terms of security, resources and computing power leads to necessity of accessing cloud resources in mobile device. Though there are some limitations in smartphones such as limited computing power and energy resources as compared to desktops. CloneCloud can be used as a solution to migrate the applications from mobile device to the clone over cloud. This will speed up the execution and reduce energy consumption in smartphones. There is a need to secure the communication that taken place in this scenario. For this purpose, proposed solution with elliptic curve cryptography and blowfish will ensure confidentiality and authentication between mobile device and clone server. Elliptic curve cryptography and blowfish have better performance in resource constrained devices. We have integrated modifications for blowfish to enhance the security.

Air pollution is a major environmental health problem affecting everyone. An air quality index (AQI) helps disseminate air quality information (almost in real time) about pollutants like PM10, PM2.5, NO2, SO2, CO, O3, etc. In the 2018 environmental performance index (EPI), India ranks 177 out of 180 countries, which indicates a need for awareness about air pollution and air quality monitoring. Out of the 100 smart cities in the Indian Smart City Mission, which is an urban renewal program, many cities have considered the inclusion of smart environment sensors or smart poles with environment sensors as part of their proposals. Internet of things (IoT) environmental monitoring applications can monitor (in near real time) the quality of the air in crowded areas, parks, or any location in the city, and its data can be made publicly available to citizens. The chapter describes some IoT environmental monitoring applications being implemented in some of the smart cities like Surat, Kakinada.