@article{Arampatzis2015, year={2015}, issn={1386-4564}, journal={Information Retrieval Journal}, volume={18}, number={4}, doi={10.1007/s10791-015-9256-0}, title={Versatile Query Scrambling for Private Web Search}, url={http://dx.doi.org/10.1007/s10791-015-9256-0}, publisher={Springer Netherlands}, keywords={Query scrambler; Search privacy; Query-based document sampling; Mutual information; Set covering; Inter-user agreement}, author={Arampatzis, Avi and Drosatos, George and Efraimidis, Pavlos S.}, pages={331-358}, language={English} }