A Hierarchical Attribute-Based Encryption Scheme  

作　　者：ZOU Xiubin 

机构地区：[1]College of Computer and Mathematics,Jianghan University

出　　处：《Wuhan University Journal of Natural Sciences》2013年第3期259-264,共6页武汉大学学报（自然科学英文版）

基　　金：Supported by the National Natural Science Foundation of China(60903175,60703048);the Natural Science Foundation of Hubei Province(2009CBD307,2008CDB352)

摘　　要：According to the relation of an attribute set and its subset,the author presents a hierarchical attribute-based encryption scheme in which a secret key is associated with an attribute set.A user can delegate the private key corresponding to any subset of an attribute set while he has the private key corresponding to the attribute set.Moreover,the size of the ciphertext is constant,but the size of private key is linear with the order of the attribute set in the hierarchical attribute-based encryption scheme.Lastly,we can also prove that this encryption scheme meets the security of IND-sSETCPA in the standard model.According to the relation of an attribute set and its subset,the author presents a hierarchical attribute-based encryption scheme in which a secret key is associated with an attribute set.A user can delegate the private key corresponding to any subset of an attribute set while he has the private key corresponding to the attribute set.Moreover,the size of the ciphertext is constant,but the size of private key is linear with the order of the attribute set in the hierarchical attribute-based encryption scheme.Lastly,we can also prove that this encryption scheme meets the security of IND-sSETCPA in the standard model.

关 键 词：attribute-based encryption hierarchical attributebased encryption identity-based encryption（IBE） bilinear map 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]