Yih Huang David Arsenault Arun Sood Closing Cluster Attack Windows Through Server Redundancy and Rotations. 21 2006 conf/ccgrid/2006 CCGRID http://doi.ieeecomputersociety.org/10.1109/CCGRID.2006.126 db/conf/ccgrid/ccgrid2006.html#HuangAS06