适应性安全的可追踪叛徒的基于属性加密方案

doi:10.11959/j.issn.1000-436x.2016009

Journal on Communications ›› 2016, Vol. 37 ›› Issue (1): 76-87.doi: 10.11959/j.issn.1000-436x.2016009

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Adaptively secure attribute-based encryption for traitor tracing

ying MAHai¹,sun ZENGGuo²,ping CHENJian¹,hua WANGJin³,jun WANGZhan³

¹ College of Computer Science and Technology,Nantong University,Nantong 226019,China
² Department of Computer Science and Technology,Tongji University,Shanghai 201804,China
³ School of Science,Nantong University,Nantong 226007,China

Online:2016-01-25 Published:2016-01-27
Supported by:
The National Natural Science Foundation of China;The National Natural Science Foundation of China;The National Natural Science Foundation of China;The National Natural Science Foundation of China;The National Natural Science Foundation of China;The National Natural Science Foundation of China;The Joint of NSFC and Microsoft Asia Research;The Program of Shanghai Subject Chief Scientist;The Ph.D Programs Foundation of Ministry of Education China;Shanghai Natural Science Foundation Program;The Natural Science Foundation of Nan tong University

Abstract

Abstract:

For the key abuse problem in attribute-based encryption (ABE),each user was identified by his unique identity, and the collusion secure codes and the traitor tracing mechanism were introduced to the ABE scheme. The definition,security model and tracing model for adaptively secure attribute-based encryption for traitor tracing (ABTT)were forma-lized,and an adaptively secure ABTT scheme was proposed,which may trace traitors in policy-specific pirate decorders. Under these subgroup decision assumptions in composite groups and the DDH assumption,adaptively secure and can adaptively trace traitors were proved. Therefore, the scheme not only was capable of tracing adaptively traitors in policy-specific pirate decorders,but also further strengthens the security of ABE system,which has theoretical and prac-tical values.

Key words: attribute-based encryption, traitor tracing, dual system encryption, adaptive security, collusion secure code

ying MAHai,sun ZENGGuo,ping CHENJian,hua WANGJin,jun WANGZhan. Adaptively secure attribute-based encryption for traitor tracing[J]. Journal on Communications, 2016, 37(1): 76-87.

Figures/Tables 1

方案	密文长度	私钥长度	解密双线对个数	追踪性
LOS	2n₁+2	\|w\|+2	2\|I\|+1	否
LCW	$2 n_{1} + 17 \sqrt{N}$	\|w\|+4	2\|I\|+10	适应性追踪类密钥盗版解码器，选择性追踪指定策略盗版解码器
本文	2 n₁+n+2	\|w\|+3	2\|I\|+2	适应性追踪指定策略盗版解码器

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Adaptively secure attribute-based encryption for traitor tracing

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