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UOV and Rainbow are multivariate signature schemes, which are known to be efficient and secure enough against known attacks under suitable parameter selections, and have been expected to be post-quantum cryptography. Recently, new variants of UOV and Rainbow, called Circulant UOV and Circulant Rainbow respectively, were proposed by Peng and Tang. In these variants, the signature generation is faster than the original schemes since circulant matrices appear in the process of signaturedoi:10.14495/jsiaml.11.45 fatcat:iq3ocupvm5buvgsee5r2a32xr4