Continued improvements in network bandwidth, cost, and ubiquitous access are enabling service providers to host desktop computing environments to address the complexity, cost, and mobility limitations of today’s personal computing infrastructure. However, distributed denial of service attacks can deny use of such services to users. We present A2M, a secure and attack-resilient desktop computing...

Model transformations do not simply appear. They have to be not-so-simply developed. In early phases of development, there may exist only an intuition or an educated guess on some of the characteristics of the transformation. Instead of assuming a pre-existing complete transformation specification, we embrace change and develop transformations incrementally, gradually refining them into more co...

Abstract: In Grid-based collaborations, a number of data sharing services in Grid are established to provide a unified platform for dynamic discovery, access and replication of distributed data. Controlling access to Grid data in these services requires the ability to dynamically make authorisation decisions based on the data owners’ policies and users’ credentials across administrative domains...

Assured Service, a service model of Internet Differentiated Services (DiffServ) architecture, is not so well accommodated by the current Internet environment. This is because the Internet’s Transmission Control Protocol (TCP) employs an AIMD (Additive Increase and Multiplicative Decrease) mechanism to control congestion. As a result, Assured Service cannot meet the target rate of high-profile f...