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Table 3 Impossible differential trails for SIMECK by applying miss-from-the-middle

From: Searching for impossible subspace trails and improved impossible differential characteristics for SIMON-like block ciphers

  Rounds Impossible differential trails
SIMECK48 15 (000000, 400000) \(\nrightarrow \) (800008, 000000)
   (000000, 400000) \(\nrightarrow \) (800000, 000000)
   (000000, 800008) \(\nrightarrow \) (400000, 000000)
   (000000, 400000) \(\nrightarrow \) (000008, 000000)
   (000000, 000008) \(\nrightarrow \) (400000, 000000)
   (000000, 800000) \(\nrightarrow \) (400000, 000000)
SIMECK64 17 (00000000, 00000002) \(\nrightarrow \) (40000046, 00000000)
   (00000000, 40000040) \(\nrightarrow \) (00000002, 00000000)
   (00000000, 00000002) \(\nrightarrow \) (40000040, 00000000)
   (00000000, 40000046) \(\nrightarrow \) (00000002, 00000000)
   (00000000, 40000004) \(\nrightarrow \) (00000002, 00000000)
   (00000000, 40000002) \(\nrightarrow \) (00000002, 00000000)
   (00000000, 00000002) \(\nrightarrow \) (40000004, 00000000)
   (00000000, 00000002) \(\nrightarrow \) (40000044, 00000000)
   (00000000, 00000002) \(\nrightarrow \) (40000000, 00000000)
   (00000000, 00000002) \(\nrightarrow \) (40000042, 00000000)
   (00000000, 40000006) \(\nrightarrow \) (00000002, 00000000)
   (00000000, 40000044) \(\nrightarrow \) (00000002, 00000000)
   (00000000, 40000042) \(\nrightarrow \) (00000002, 00000000)
   (00000000, 00000002) \(\nrightarrow \) (40000002, 00000000)
   (00000000, 00000002) \(\nrightarrow \) (40000006, 00000000)
   (00000000, 40000000) \(\nrightarrow \) (00000002, 00000000)