Giuseppe Ateniese Randal C. Burns Reza Curtmola Joseph Herring Lea Kissner Zachary N. J. Peterson Dawn Xiaodong Song Provable data possession at untrusted stores. 598-609 2007 ACM Conference on Computer and Communications Security http://doi.acm.org/10.1145/1315245.1315318 conf/ccs/2007 db/conf/ccs/ccs2007.html#AtenieseBCHKPS07