How is the unknown bits (annotated by red arrow in figure below) come in the OUTPUT after round 1 and round 2 ?

Following is the pictorial representation of SIMECK round function operation.

simeck round function forward encryption

Ref: Research Paper (figure 3)

  • $\begingroup$ it is SIMECK32. $\endgroup$
    – ironman
    Apr 2, 2020 at 19:47


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