Encryption-enforced access control for an RFID discovery service

In this demonstration we present a novel encryption scheme for enforcing access control in a Discovery Service. A Discovery Service is a piece of software that allows one to "discover" item-level data which is stored in data repositories of different companies. Such data can be gathered with the help of Radio Frequency Identification or 2D bar codes. Our software allows the data owner to enforce access control on an item-level by managing the corresponding keys. Data remains confidential even against the provider of the Discovery Service. We present three ways of querying data and evaluate them with databases containing up to 50 million tuples.