Cryptology ePrint Archive: Report 2017/196

Attribute-based concurrent signatures

BaoHong Li, Guoqing Xu and Yinliang Zhao

Abstract: This paper introduces the notion of attribute-based concurrent signatures. This primitive can be considered as an interesting extension of concurrent signatures in the attribute-based setting. It allows two parties fairly exchange their signatures only if each of them has convinced the opposite party that he/she possesses certain attributes satisfying a given signing policy. Due to this new feature, this primitive can find useful applications in online contract signing, electronic transactions and so on. We formalize this notion and present a con-struction which is secure in the random oracle model under the Strong Dif-fie-Hellman assumption and the eXternal Diffie-Hellman assumption.

Category / Keywords: public-key cryptography / fair exchange, concurrent signatures.

Date: received 27 Feb 2017

Contact author: bhli at mail xjtu edu cn

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Version: 20170228:194429 (All versions of this report)

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