Ticket displaying device, key data server, and ticket data server

A ticket displaying device comprising:

• a clock unit configured to indicate the date and time;
• a sending unit configured to send a download request for ticket image data for authenticating admission rights to a server when predetermined conditions are satisfied;
• a generating unit configured to:
• generate a first seed code corresponding to a first ticket purchaser identifying information and a first key data;
• and
• periodically generate a first ticket image data;
• a receiving unit configured to receive the first ticket image data for authenticating admission rights from the server, wherein the first ticket image data is based on the date and time indicated by the clock unit and a first seed code;
• and
• a display unit configured to display, when the first key data is provided, the first ticket image data,
• wherein, after purchase of a ticket by the first ticket purchaser, the first key data is generated by a key data server based on first ticket purchaser identifying information,
• wherein, after purchase of the ticket by the first ticket purchaser, a second key data is generated by the key data server based on a second ticket displaying device or the identity of a second ticket purchaser,
• wherein the second key data is different from the first key data,
• wherein a second seed code, which is identical to the first seed code, is generated using second ticket purchaser identifying information and the second key data,
• wherein, when the date and time indicated by the clock unit of the ticket displaying device coincides with a date and time indicated by a second clock unit of the second ticket displaying device, the first ticket image data is displayed on the second ticket displaying device using the date and time and the second seed code,
• wherein the first ticket image data displayed on the display unit changes over time,
• wherein the first ticket image data has display timing controlled on the basis of the date and time indicated by the clock unit, and
• wherein the first ticket image data displayed on the display unit shows the same changes over time as second ticket image data displayed on the second ticket displaying device for authenticating the same admission rights as the first ticket image data.

A ticket display program causing a computer to function as

• a sending unit configured to send a download request for ticket image data for authenticating admission rights to a server when predetermined conditions are satisfied;
• a generating unit configured to:
• generate a first seed code corresponding to a first ticket purchaser identifying information and a first key data;
• and
• periodically generate a first ticket image data;
• a receiving unit configured to receive the first ticket image data for authenticating admission rights from the server, wherein the first ticket image data is based on the date and time indicated by a first clock unit of the computer and the first seed code;
• and
• a display unit configured to display, when the first key data is provided, the first ticket image data,
• wherein, after purchase of a ticket by the first ticket purchaser, the first key data is generated by a key data server based on first ticket purchaser identifying information,
• wherein, after purchase of the ticket by the first ticket purchaser, a second key data is generated by the key data server based on a second computer or the identity of a second ticket purchaser,
• wherein the second key data is different from the first key data,
• wherein a second seed code, which is identical to the first seed code, is generated using second ticket purchaser identifying information and the second key data,
• wherein, when the date and time indicated by the first clock unit of the computer coincides with a date and time indicated by a second clock unit of a second computer, the first ticket image data is displayed on a display unit of the second computer using the date and time and the second seed code,
• wherein the first ticket image data displayed on the display unit changes over time,
• wherein the first ticket image data has display timing controlled on the basis of the date and time indicated by the first clock unit, and
• wherein the first ticket image data displayed on the display unit shows the same changes over time as second ticket image data for authenticating the same admission rights as the first ticket image data displayed on the display unit of the second computer executing the ticket display program.