Indeed and for me I often feel a 511bit key better than a 512bit key or a 1023bit key better than a 1024 bit key down to the aspect of rainbow tables alone. T

Indeed and for me I often feel a 511bit key better than a 512bit key or a 1023bit key better than a 1024 bit key down to the aspect of rainbow tables alone. Though I'm sure somebody with superior knowledge of crypto systems could prove me wrong, I've not had that pleasure yet and I love being wrong - it is when I learn the most.