A client device or other processing device comprises a file processing module, with the file processing module being operative to provide a file to a file system for encoding, to receive from the file system a proof of correct encoding of the file, and to verify the proof of correct encoding. Player activity is tracked at the gaming machines during regular gaming sessions and during virtual gaming sessions. The ticket comprises an initial hand of cards imprinted on the ticket, wherein the initial hand is normally hidden under a corresponding alterable area so that when the alterable area corresponding to the initial hand is altered, the initial hand is revealed.