Hierarchical identity-based encryption without key delegation in decryption

doi:10.1504/IJGUC.2014.060182

CORC > 北京大学 > 信息科学技术学院

	Hierarchical identity-based encryption without key delegation in decryption
	Luo, Song ; Chen, Zhong
刊名	international journal of grid and utility computing
	2014
DOI	10.1504/IJGUC.2014.060182
英文摘要	Hierarchical Identity-Based Encryption (HIBE) is a generalisation of Identity-Based Encryption (IBE) which mirrors an organisational hierarchy. However, when the user decrypts a ciphertext encrypted to a hierarchical identity, he/she should know the exact hierarchical identity in order to run the delegate algorithm to get the secret key corresponding to the target hierarchical identity if the hierarchical identity linked with his/her key is a prefix of the target hierarchical identity. In this paper, we consider a new concept called HIBE without key delegation in decryption. In such HIBE systems, the user can decrypt the ciphertext directly without running the delegate algorithm even if his hierarchical identity is only a prefix of the target hierarchical identity. We present two HIBE systems, which are proven secure in the standard model under the decision BDH and l-BDHE assumptions, respectively. Both systems have the same decryption efficiency in pairing, compared with BB1-HIBE system and BBG-HIBE system, respectively. ? 2014 Inderscience Enterprises Ltd.; EI; 0; 2; 71-79; 5
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/327966]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Luo, Song,Chen, Zhong. Hierarchical identity-based encryption without key delegation in decryption[J]. international journal of grid and utility computing,2014.
APA	Luo, Song,&Chen, Zhong.(2014).Hierarchical identity-based encryption without key delegation in decryption.international journal of grid and utility computing.
MLA	Luo, Song,et al."Hierarchical identity-based encryption without key delegation in decryption".international journal of grid and utility computing (2014).