Lu Su, Yunlong Gao, et al.
IFIP Networking 2014
In a federated database system, each independent party exports some of its data for information sharing. The information sharing in such a system is very inflexible, as all peer parties access the same set of data exported by a party, while the party may want to authorize different peer parties to access different portions of its information. We propose a novel query evaluation scheme that supports differentiated access control with decentralized query processing. A new efficient join method, named split-join, along with other safe join methods is adopted in the query planning algorithm. The generated query execution reduces the communication cost by pushing partial query computation to data sources in a safe way. The proofs of the correctness and safety of the algorithm are presented. The evaluation demonstrates that the scheme significantly saves the communication cost in a variety of circumstances and settings while enforcing autonomous and differentiated information sharing effectively.
Lu Su, Yunlong Gao, et al.
IFIP Networking 2014
Min Li, Wanyu Zang, et al.
ACSAC 2013
Shengzhi Zhang, Wenjie Wang, et al.
Future Generation Computer Systems
Shengzhi Zhang, Haishan Wu, et al.
CNSM 2011