New Fuzzy Identity-Based Encryption in the Standard Model

被引：4

作者：

Ren, Yanli ^{[1
,2
]}

Gu, Dawu ^{[1
]}

Wang, Shuozhong ^{[2
]}

Zhang, Xinpeng ^{[2
]}

机构：

[1] Shanghai Jiao Tong Univ, Dept Comp Sci & Engn, Shanghai 200240, Peoples R China

[2] Shanghai Univ, Sch Commun & Informat Engn, Shanghai 200072, Peoples R China

来源：

INFORMATICA | 2010年 / 21卷 / 03期

基金：

高等学校博士学科点专项科研基金;

关键词：

cryptography; fuzzy identity-based encryption; IND-FID-CCA2; security; standard model;

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In a fuzzy identity-based encryption (IBE) scheme, a user with the secret key for an identity ID is able to decrypt a ciphertext encrypted with another identity ID' if and only if ID and ID' are within a certain distance of each other as judged by some metric Fuzzy IBE also allows to encrypt a document to all users that have a certain set of attributes In 2005, Sahai and Waters first proposed the notion of fuzzy IBE and proved the security of their scheme under the selective-ID model. Currently, there is no fuzzy IBE scheme available that is fully CCA2 seem e in the standard model. In this paper, we propose a new fuzzy IBE scheme which achieves IND-FID-CCA2 security in the standard model with a tight reduction. Moreover, the size of public parameters is independent of the number of attributes associated with an identity.

引用

页码：393 / 407

页数：15

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