Uthpala Subodhani Premarathne

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In view of recent attacks on smart grid surveillance is of vital importance to enforce surveillance based disaster recovery management operations to ensure seamless energy generation anddistribution. The reliability of disaster recoverymanagement depends on availability and privacy preservation of surveillance data. In this paperwe propose a reliable(More)
Cloud computing offers cost-effective solutions via a variety of flexible services. However, security concerns related to managing data, applications, and interactions hamper the rapid deployment of cloud-based services on a large scale. Although many solutions exist, efficiency, scalability, and provable security still have issues that need to be properly(More)
Utility based cloud services can efficiently provide various supportive services to different service providers. Trust negotiations with federated identity management are vital for preserving privacy in open systems such as distributed collaborative systems. However, due to the large amounts of server based communications involved in trust negotiations(More)
Load balancing is a performance improvement aid in various applications of distributed systems. In this paper we propose a preference based load balancing strategy as a scheduling aid in an outpatient clinic of an online medical consultation system. The performance objectives are to maximizing throughout and minimizing waiting time. Patients will provide a(More)
Single-sign-on (SSO) has been proposed as a more efficient and convenient authentication method. Classic SSO systems re-authenticate a user to different applications based on a fixed set of attributes (e.g. Username-password combinations). However, the use of a fixed set of attributes fail to account for mobility and contextual variations of user(More)
The aim of a medical consultation system is to deliver reliable healthcare services efficiently. In this paper we propose an online medical consultation system with load balancing as an assurance for maximum resource utilization. Rule-based fuzzy controlled load balancing is applied to a homogeneous system consisting of three medical centers with limited(More)
Cloud-based electronic health record (EHR) systems are next-generation big data systems for facilitating efficient and scalable storage and fostering collaborative care, clinical research, and development. Mobility and the use of multiple mobile devices in collaborative healthcare increases the need for robust privacy preservation. Thus, large-scale EHR(More)
In pervasive computing applications (e.g. electronic health records), the amount of information permissible to be shared or accessed by mobile users results in high disclosure risks. Obfuscation techniques are desirable in reducing the impact of disclosing confidential information but with a significant loss of utility of information content. Thus, accesses(More)