Attribute-Based Designated Combiner Transitive Signature Scheme

Shaonan Hou, Shaojun Yang () and Chengjun Lin
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Shaonan Hou: School of Mathematics and Statistics, Fujian Normal University, Fuzhou 350117, China
Shaojun Yang: School of Mathematics and Statistics, Fujian Normal University, Fuzhou 350117, China
Chengjun Lin: Fujian Key Laboratory of Financial Information Processing, Putian University, Putian 351100, China

Mathematics, 2024, vol. 12, issue 19, 1-14

Abstract: Transitive signatures allow any entity to obtain a valid signature of ( i , k ) by combining signatures of ( i , j ) and ( j , k ) . However, the traditional transitive signature scheme does not offer fine-grained control over the combiner. To address this issue, we propose a formal definition of the attribute-based designated combiner transitive signature (ABDCTS) and its security model, where only entities whose inherent attributes meet the access policy can combine signatures. By introducing the fine-grained access control structure, control over the combiner is achieved. To demonstrate the feasibility of our primitive, this paper presents the first attribute-based designated combiner transitive signature scheme. Under an adaptive chosen-message attack, we prove its security based on the one-more CDH problem and the co-CDH problem, and that its algorithms have robustness.

Keywords: attribute-based; transitive signature; fine-grained control (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2024
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