| http://www.w3.org/ns/prov#value | - (S) The first layer of permutation (the Y-shaped signal paths in FIG. 17) selects the bits in the signal register that are secretly known to be repeated bits, and ignores the non-repeated bits. (Since half of the bits are discarded, only half of the permutation is actually implemented here, so selection is a more accurate description than permutation.) Each ???Y??? in the figure represents the sel
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