Comment on “An efficient identity-based signature scheme with provable security”


Tan, Syh Yuan and Heng, Swee Huay (2024) Comment on “An efficient identity-based signature scheme with provable security”. Information Sciences, 659. p. 120079. ISSN 0020-0255

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In this comment paper, we reveal a security issue in an efficient identity-based signature (IBS) scheme that has been proven secure in the standard model. More specifically, we perform a keyonly attack on the IBS scheme to break its universal unforgeability. Since the security notion of universal unforgeability under key-only attack (uuf-koa) is a weaker notion than the existential unforgeability under chosen message attack (euf-cma), this invalidates the euf-cma security claimed by the IBS scheme. Subsequently, we propose a fix to achieve a stronger seuf-cma security without a random oracle.

Item Type: Article
Uncontrolled Keywords: Identity-based signature
Subjects: Q Science > QA Mathematics > QA71-90 Instruments and machines
Divisions: Faculty of Information Science and Technology (FIST)
Depositing User: Ms Nurul Iqtiani Ahmad
Date Deposited: 31 Jan 2024 01:05
Last Modified: 31 Jan 2024 01:05


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