CASTmiddleware: Security Middlewareof Context-Awareness Simulation Toolkitfor Ubiquitous Computing Research Environment

摘要

The study deals with the most important elements of ubiquitousrncomputing, that is, the toolkit to acquire, express and safely use the context information.rnTo do so, we introduce security middleware of CAST(Context-rnAwareness Simulation Toolkit) and show how it works. CAST generates usersrnand devices in a virtual home domain, designates their relation and acquires virtualrncontext information. The created context information is reused by the requestrnof application and put into use for context learning. Particularly, we haverngiven a consideration to security in the process of context acquisition and itsrnconsumption. That is, we applied SPKI/SDSI to test if the created context informationrnwas valid information and if the application that called for the contextrnhad legitimate authority to do so. CASTmiddleware not only captures virtualrncontext information, but it also guarantees the safe sharing of the context informationrnrequested by the application.