Marten van Dijk Jonathan Rhodes Luis F. G. Sarmenta Srinivas Devadas Offline untrusted storage with immediate detection of forking and replay attacks. 41-48 2007 STC http://doi.acm.org/10.1145/1314354.1314364 conf/ccs/2007stc db/conf/ccs/stc2007.html#DijkRSD07