def cmul_xor_ddt(self, F=None):
if F is None:
F = GF(self.insize, name='a')
cxddt = matrix(ZZ, self.insize, self.outsize)
for x in range(1, self.insize):
for dx in range(2, self.insize):
x2 = (F.fetch_int(x) *
F.fetch_int(dx)).integer_representation()
y = self[x]
y2 = self[x2]
dy = y2 ^ y
cxddt[dx, dy] += 1
return cxddt
def xor_cmul_ddt(self, F=None):
if F is None:
F = GF(self.insize, name='a')
xcddt = matrix(ZZ, self.insize, self.outsize)
for x in range(self.insize):
for dx in range(1, self.insize):
x2 = x ^ dx
y = self[x]
y2 = self[x2]
dy = (F.fetch_int(y2) * F.fetch_int(y)
**(self.outsize - 2)).integer_representation()
xcddt[dx, dy] += 1
return xcddt
