Electronic game-of-chance device

An electronic game of chance comprising:

• a portable box containing:
• box interface means for receiving a predetermined game authorization information item required for a game to be played and for receiving a payment request information item;
• communication means for communicating with the player;
• means for determining reference data item internally within said box;
• memory means for storing at least one reference data item
• a box processor including
• box comparison means for comparing said reference data item with a game data item communicated by the player via said communication means, one of these two data items being a value generated within said portable box by a first random generator means
• win detection means, responsive to said box comparison means, for establishing a win information item depending at least on the result of said comparison, and for storing said win information item in said memory means, and
• box encryption means, responsive to said payment request information item, for establishing a first encrypted win value from said win information item and for delivering said first encrypted win value to said box interface means;
• and
• a control system external to said portable box containing:
• a system input/output interface and
• a system processor including means, responsive to a payment request originating from the player, for reading said win information item contained in said memory means of said portable box and for delivering said payment request information item to said system input/output interface,
• system encryption means for establishing a second encrypted win value from said win information item, and
• system comparison means for comparing said two encrypted win values to control payment in response to said payment request.