One of my favorite versions of this trick was invented by Martin Gardner and actually uses a timing attack... on your brain! [0] Without apparently telling the

One of my favorite versions of this trick was invented by Martin Gardner and actually uses a timing attack... on your brain! [0] Without apparently telling the magician anything, you end up giving enough information to uniquely identify your number! [0] https://web.archive.org/web/20121228075545/http://devblog.bu.mp/martin-gardner-had-a-timing-attack-for-your-m https://web.archive.org/web/20121228075545/http://devblog.bu...