How To Read Scratch Off Tickets Without Scratching. Not necessarily this particular attack, but some way to separate winners from losers without voiding the tickets. To use this method, look at your selection of cards.
In fact, you didn’t have to do any scratching off. Srivastava decided to give it a try. There is no way to discover whether the ticket is a winner until the bottom code is scratched off, which is to deter that exact situation.