Alexander Heitzmann Bernardo Palazzi Charalampos Papamanthou Roberto Tamassia Efficient integrity checking of untrusted network storage. 43-54 2008 StorageSS http://doi.acm.org/10.1145/1456469.1456479 conf/storagess/2008 db/conf/storagess/storagess2008.html#HeitzmannPPT08