I think that's exactly what I thought when I read his comment. I'm not sure why anyone else thinks it's a bad idea, though. Let me clarify it a bit: Just lik

I think that's exactly what I thought when I read his comment. I'm not sure why anyone else thinks it's a bad idea, though. Let me clarify it a bit: Just like a rotary telephone, the numbers are in a circle. To open the lock, you drag your finger in a circle around the ring, alternating left and right like a combination lock. But to make sure the smudges are meaningless, the device rotates the rings randomly before each attempt. You still enter the same code, in the same pattern, but the rotation of the device changes each time.