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A new way to cryptanalysis the AC block cipher is presented in this document. The AC block cipher is based upon the bit-slice technology. By using the bit-pattern integral attack, a 2-round integral distinguisher can be get; then using this distinguisher can attack on 3-round of AC block cipher. It is shown that the full subkey of 3-round AC can be recovered with 212.5 chosen plaintexts and 256 partial...
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