@Article {dfpps-tcc2018,
author = {S. {De Capitani di Vimercati} and S. Foresti and S.
Paraboschi and G. Pelosi and P. Samarati},
title = {Three-Server Swapping for Access Confidentiality},
journal = {IEEE Transactions on Cloud Computing (TCC)},
volume = {6},
number = {2},
pages = {492-505},
month = {April-June},
year = {2018}
}