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We state the design flaws of the 1-round block cipher SHAMATA-
BC, designed by Fleishmann and Gorski by using the building
blocks of SHAMATA hash function. We fix the flaws and then show that
the a...
In this note we discuss some observation of the SHA-3 candidate SHAMATA [1]. We ob-
serve that its internal block cipher is very weak, which could possibly lead to an attack on the hash function.