Abstract: 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.

Abstract: 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.

Abstract: In an instant lottery ticket game structure having a lottery administration host computer that includes a ticket validation file containing prize codes for at least some of the lottery tickets, provision for instant lottery tickets having variable redemption values can be made by allowing the prize codes in the validation file to be changed under certain predetermined circumstances. At least some of the lottery tickets in the game, whether printed or electronically simulated, can be provided with play indicia under a removable coating that indicates that the redemption value of that lottery ticket is variable. Using the host computer, a lottery administration can change the prize codes and therefore the redemption value of these instant lottery tickets according to the predetermined criteria such as the termination of a game.