简介：Patarinproposedthedragonscheme,pointedouttheinsecurityofthedragonalgorithmwithonehiddenmonomialandsuggestedacandidatedragonsignaturealgorithmwithacomplicatedfunction.Thispaperpresentsanalgebraicmethodtoattackthecandidatedragonsignaturealgorithm.TheattackborrowsthebasicideaoftheattackduetoKipnisandShamir,andutilizestheunderlyingalgebraicstructureofthecandidatedragonsignaturealgorithmovertheextensionfieldtoderiveawaytoenablethevariableYbeviewedasafixedvalue.Theattackrecoverstheprivatekeysefficientlywhentheparametersaren≤25andD=[logqd]≤3.
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