That adds another twist :-) I just thought it would be amusing to think about different metrics and human perception. In the metric of keystrokes needed the enc

That adds another twist :-) I just thought it would be amusing to think about different metrics and human perception. In the metric of keystrokes needed the encrypted file is closer to Bob, whereas in the metric of time needed the empty file might be closer. Human perception intuitively thinks the encrypted file is closer, but it might be wrong.