An Expressive Attribute-based Signature Scheme without Random Oracles

摘要：

　　Attribute-based signatures (ABS) is a new cryptographic primitive and can play a great role in attributebased access control systems.In ABS,a signer can choose its attributes satisfying a policy of a verifier to generate a valid signature without reveal its identity or attributes,while the signature assures that the message is endorsed by an individual owning attributes the policy requiring.However,most existing works of ABS need random oracles,which is unpractical and results in the dependence of security on hash functions.In this paper,we refer to the mature techniques used in identity-based encryption (IBE) to propose an ABS scheme without random oracles.Our scheme support any expressive policy consisting of AND,OR,threshold gates,which offers great flexibility to the implementation of access control.

关键词： ABS random oracles policy IBE

作者: Dan Cao Tianzuo Wang Xiaofeng Wang Jinshu Su

作者单位: School of Computer National University of Defense Technology Changsha, China

会议类型: 国际会议

会议名称: 2012 2nd International Conference on Computer Application and System Modeling(2012第二届计算机应用与系统建模国际会议)(ICCASM-2012)

会议地点: 沈阳

会议语种:英文

页码: 560-564

在线出版日期: 2012-07-27（万方平台首次上网日期，不代表论文的发表时间）