|
|
|
| A New Hierarchical Identity-Based Encryption in the Standard Model |
| Zhang Le-you①②; Hu Yu-pu②; Wu Qing① |
| ①Department of Applied Mathematics, Xidian University, Xi’an 710071, China;②Key Laboratory of Computer Networks and Information Security, Xidian University, Xi’an 710071, China |
|
|
|
|
Abstract In this paper, a new Hierarchical Identity-Based Encryption(HIBE) scheme is proposed and is provable security in the generalized selective-ID model in the standard model. Under the decision Bilinear Diffie-Hellman Inversion (BDHI) assumption, this new scheme is provable security against Chosen Plaintext Attacks(CPA). Additionally, a Hierarchical Identity-Based Signature (HIBS) scheme is proposed based on the Waters’s scheme and our technique in the standard model. And under Diffie-Hellman Inversion(DHI) assumption, it is provable security against existentially unforgeable under an adaptive chosen message attack.
|
|
Received: 03 December 2007
|
|
|
|
|
|
|
|
|
2009, Vol. 31 
