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.

Abstract- The importance of social network applications on mobile devices is becoming more popular. The mobile presence service is a vital component in social network through which it handles every mobile user information, such as the network address, present status and GPS location, and also updates the user online buddies with the information frequently. When plenty updates occur continuously more number of messages are sent to the servers, this may lead to scalability problem in large scale mobile presence services. To address this, we use a server architecture known as PresenceCloud, which supports large scale social network applications. In day to day life, the number of mobile users of social network applications is increasing rapidly, due to this the response time from the server may be decreased by getting more requests from the mobile users. In our proposed method we are introducing an algorithm for Load balancing, which allocate the work to the clusters of presence server. The load balancing algorithm is Transaction-Least-Work-Left(TLWL), used to allocate work to least values of the servers. This algorithm reduces the response time by distributing the requests to all other servers. Keywords- Distributed Presence servers, cloud computing, social networks, load balancing, mobile presence services I.