Giovanni Russello Changyu Dong Naranker Dulay Michel R. V. Chaudron Maarten van Steen Encrypted Shared Data Spaces. 264-279 2008 COORDINATION http://dx.doi.org/10.1007/978-3-540-68265-3_17 conf/coordination/2008 db/conf/coordination/coordination2008.html#RusselloDDCS08