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intelligence_src_e53adb99e40ae66258
observed · 2026-10-12 16:25:04 UTC
ePrint Report: Revisiting Lattice-based Blind Signatures Again Yi-Fu Lai, Yu Yu We show an attack on a lattice-based blind signature proposed in Crypto'20. Formally it is a linear hash function based framework with a lattice-based instantiation. We first notice a bug in their security proof of blindness, which is overlooked these years. Then, we develop an attack under the honest key and the honest-but-curious signer setting against the blindness notion of the schemes by exploiting the coorelations between the leaves of the tree. We also discuss how to repair the scheme.
Fingerprint: e2918dc61ff8354742520489da44c98d408ea65d077d4d830808934cf280852a
intelligence_src_e53adb99e40ae66258
observed · 2026-10-12 16:25:03 UTC
available
Fingerprint: 366cb966e32414edc1db353849a1ee8d6b8462b83786e04001881ba6594765ad