In a method for manufacturing instant lottery tickets where book numbers
and ticket numbers are printed on the tickets utilizing a dual security
process such that the book numbers are shuffled in each pool before the
tickets are printed to break the link between the book numbers the ticket
numbers or validation numbers, a reversing process can be used under
certain predefined conditions to relate the original book numbers to the
ticket numbers or validation numbers. In one example, where a shuffling
algorithm utilizing seeds is used to shuffle the book numbers, the seeds
used in the algorithm are maintained in an encrypted file. A decryption
key for the encrypted seed file can be used by a lottery administration
or trusted third party to reconstruct game play indicia for game
adjustment purposes and manufacturing adjustments. To enhance security,
the independent third party can also be used to administer the encryption
and decryption keys during the ticket manufacturing process and during
life of the instant ticket game.