A system for administering promotions in which a player is awarded promotion credit to be consumed in wagering activities includes a credit administration facility that maintains a player credit account, and a display means capable of displaying a composition of the player credit account on a display means. A heat sink layer is formed on the imprint substrate only in the data regions. The first active device has a first gate, a first source connected to one of the data lines, and a first drain. The message to be encrypted can be obtained via performing a hash function on the source data on the digital object to obtain a message digest.