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Lecture Notes in Computer Science
The Unbalanced Oil and Vinegar scheme (UOV) is a signature scheme based on multivariate quadratic equations. It uses m equations and n variables. A total of v of these are called "vinegar variables". In this paper, we study its security from several points of view. First, we are able to demonstrate that the constant part of the affine transformation does not contribute to the security of UOV and should therefore be omitted. Second, we show that the case n ≥ 2m is particularly vulnerable todoi:10.1007/978-3-540-30574-3_4 fatcat:rikregcmnbf55lcmq5cmpwg4g4