Citation

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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Abstract

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
URII:	http://shdl.mmu.edu.my/id/eprint/12047

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