A WebID is a single sign-on token for a user’s authentication at multiple servers. In this chapter, we allow boundless WebIDs to be collected, shared, and integrated for analytics on the decentralized Social Web. The primary stakeholders in WebID analytics are the data owner, data controller, and data user. All three types of stakeholders are sufficiently aware of propagation control services so that WebIDs have best protection and usage. Types of semantics-enabled policy are proposed and enforced by data controllers to enable access control, data handling, and data releasing actions on the WebID datasets. The policy enforcement should be accountable and transparent at the data controllers to provide WebID propagation control services. Each data controller enforces a data handling policy to anonymize massive WebIDs. Moreover, the super data controller enforces access control and data releasing policies to ensure that the data owners receive the privacy-preserving WebID analytics services. Finally, we point out how to resolve WebID protection and utility conflict through different types of semantics-enabled policy to call for WebID propagation control services at the data controllers of an information value chain.
Technical Report, Dept. of Computer Science, National Chengchi University, 17th Dec., 2014