RT Article T1 Strengthen Cloud Computing Security with Federal Identity Management Using Hierarchical Identity-Based Cryptography JF Cloud computing SP 167 OP 177 A1 Yan, Liang A1 Rong, Chunming A1 Zhao, Gänsen A2 Rong, Chunming A2 Zhao, Gänsen LA English YR 2009 UL https://ixtheo.de/Record/1940698472 SN 9783642106644