Alexander Ushakov - Kahrobaei--Koupparis DSS: universal forgery

gcc:16995 - journal of Groups, complexity, cryptology, December 4, 2025, Volume 17, Issue 2 - https://doi.org/10.46298/jgcc.2025.17.2.16995
Kahrobaei--Koupparis DSS: universal forgeryArticle

Authors: Alexander Ushakov 1


Regardless of the choice of parameters, knowledge of a single signed message, i.e., a pair message/signature, produced by Kahrobaei-Koupparis digital signature scheme, proposed in [D. Kahrobaei and C. Koupparis, 2012], is sufficient to forge a valid signature for any other message.

https://doi.org/10.46298/jgcc.2025.17.2.16995
Source: HAL:hal-05373650v3
Volume: Volume 17, Issue 2
Published on: December 4, 2025
Accepted on: December 1, 2025
Submitted on: November 26, 2025
Keywords: 94A62, [INFO.INFO-CR]Computer Science [cs]/Cryptography and Security [cs.CR], [en] Group-based cryptography, Digital signatures, digital signature 2010 Mathematics Subject Classification 94A62, digital signature, 2010 Mathematics Subject Classification, 94A62
Licence: Attribution 4.0 International (CC BY 4.0)

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