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Mobile Social Networks and its related applications have made a very great impact in the society. Many new technologies related to mobile social networking are booming rapidly now-a-days and yet to boom. One such upcoming technology is Opportunistic Mobile Social Networking. This technology allows mobile users to communicate and exchange data with each other without the use of Internet. This paper is about Opportunistic Mobile Social Networks, its architecture, issues and some future research directions. The architecture and issues of Opportunistic Mobile Social Networks are compared with that of traditional Mobile Social Networks. The main contribution of this paper is regarding privacy and security issues in Opportunistic Mobile Social Networks. Finally, some future research directions in Opportunistic Mobile Social Networks have been elaborated regarding the data's privacy and security.

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Mobile cloud Computing is a new emerging technology. This technology supports many applications and one such application is presence enabled application. Mobile presence server is the main component in presence enabled applications and they provide presence services to all mobile users in the network. As number of mobile user increases to a great extent there arises buddy list search problem. In-order to solve this problem a scalable server architecture called presence cloud has been introduced. To provide security to the above server architecture SSL protocol is used. The performance is evaluated by using the parameters such as search latency and response time. SSL protocol involves determination and exchange of keys which increases buddy list search delay and response time. Therefore SSL session resumption is used to decrease this searching time and response time.

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