Re: C code of PEARL1, a block encryption algorithm emphasising simplicity
- From: Maaartin <grajcar1@xxxxxxxxx>
- Date: Wed, 18 Aug 2010 19:37:05 -0700 (PDT)
The values generated by the function genrandom are most probably
biased. The reason is that the function defined by
ULI mutualRotate(ULI i, ULI j) {
ULI mask = bitn-1;
ULI ii = i & mask;
ULI jj = j & mask;
ULI x = rotateLeft(i, jj); // rotate i by jj to the left
ULI y = rotateLeft(j, ii);
return x^y;
}
is biased. To find it out, use unsigned char, set bitn=8, and go
though all i and j.
.
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