<正>Dear editor,We re-evaluate the securities of reduced AES-192and Kalyna-128/256 against key recovery attack in the single-key model.The meet-in-the-middle attack(MIMT)was first introduced into the analysis of AES by Demirci and Sel?cuk[1]at FSE2008.The main idea was to set up a precomputation table for an ordered sequence of values.Later,ref.[2]showed that the storage of this table could be further reduced if one considered the

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