XPS++: A Publish/Subscribe System with Built-In Security and Privacy by Design

This paper presents a content-based publish/subscribe (pub/sub) middleware system designed to securely broker/filter XML events over insecure computing platforms without the complexities of the traditional cryptographic approaches (i.e., homomorphic encryption). We adopt a combination of Micro-services based pub/sub service implementation, and XML predicate/filter and the metadata hashing scheme to simultaneously achieve security and privacy objectives by design. To illustrate the practicality of the proposed system, we discuss the design and implementation details with system demonstration of a prototype, dubbed XPS++. Then, show a preliminary performance results.