Confidentiality-Preserving Publish/Subscribe: A Survey
It tackles data privacy issues for distributed applications in public clouds, but is incremental as it reviews existing methods without introducing new solutions.
This survey addresses confidentiality concerns in publish/subscribe systems deployed in untrusted environments by classifying and analyzing approaches like trust models and encryption techniques, highlighting current challenges and future research directions.
Publish/subscribe (pub/sub) is an attractive communication paradigm for large-scale distributed applications running across multiple administrative domains. Pub/sub allows event-based information dissemination based on constraints on the nature of the data rather than on pre-established communication channels. It is a natural fit for deployment in untrusted environments such as public clouds linking applications across multiple sites. However, pub/sub in untrusted environments lead to major confidentiality concerns stemming from the content-centric nature of the communications. This survey classifies and analyzes different approaches to confidentiality preservation for pub/sub, from applications of trust and access control models to novel encryption techniques. It provides an overview of the current challenges posed by confidentiality concerns and points to future research directions in this promising field.