public PrivateKey()
{
n = Extentions.p * Extentions.q;
BigInteger y;
BigInteger fi = (Extentions.p - 1) * (Extentions.q - 1);
Extentions.GCD(Extentions.e, fi, out d, out y);
d = (d + fi) % fi;
k = 0;
BigInteger res = Extentions.e * d % ((Extentions.p - 1) * (Extentions.q - 1));
BigInteger tmp = n;
while (tmp != 0)
{
k++;
tmp /= 256;
}
}