Design and Implementation of a Middleware for Sentient Spaces

Middleware for Pervasive Spaces: Balancing Privacy and Utility

“…We implemented the Privacy Manager in a real pervasive space composed of the Responsphere infrastructure [4] and the SATware middleware [21]. Together, Responsphere and SATware provide a campus-wide pervasive testbed for interdisciplinary research in situation monitoring and awareness.…”

“…It includes more than 200 sensors of different types such as video cameras, RFID readers, networked people counters, and wireless sensor networks (i.e., motes). SATware [21] is a middleware we have developed for executing pervasive applications on top of such an infrastructure. It provides applications with a semantically richer level of abstraction of the physical world compared to raw sensor streams.…”

“…We extend the existing SATware middleware [21] for pervasive spaces with a privacy manager module (Fig. 2) which incorporates (i) a policy language and mechanisms to express privacy and utility requirements, and (ii) a background knowledge model based on first-order probabilistic datalog clauses and machine learning techniques to populate it, and (iii) the disclosure component that implements the aforementioned simulated annealing-based algorithm (Section 5).…”

“…The pervasive space middleware continously answers these queries by deciding which sensors need to be queried and how to interpret the data streams generated by the sensors [21]. At any point of time t the query answers are a set of tuples Y req = {< id, att, v, t >} where id identifies an object, att identifies an attribute, and v is the observed value.…”

Privacy-preserving event detection in pervasive spaces

“…We built a prototype of the system described in this paper on top of the SATware-Responsphere framework [10], [1]. SATware is a middleware framework for programming and testing Algorithm 1 Least cost k-diverse partition.…”