Jianzhong Huang Changsheng Xie Haifeng Zhong Design and Analysis of a Scalable Third-Party Storage Security Protocol. 20-27 2008 NAS http://doi.ieeecomputersociety.org/10.1109/NAS.2008.11 conf/iwnas/2008 db/conf/iwnas/nas2008.html#HuangXZ08