Authentication system, terminal and information processing device, having function of performing stable authentication

An authentication system including a plurality of terminals and an information processing device performing data communication with said plurality of terminals through a network, wherein

• said information processing device includes:
• a storage unit configured to store identification information for identifying whether or not a user is a registered user,
• an inquiring unit making an inquiry to each of said plurality of terminals about whether or not an information reading device for reading information from an information storage medium is connected to said each of said plurality of terminals,
• a reply signal receiving unit receiving reply signals from said plurality of terminals, said reply signals being transmitted in response to said inquiry,
• a processor configured to extract a terminal to which said information reading device is connected, from said plurality of terminals, in response to receiving reply signals from that extracted terminal, and
• a first identification information transmitting unit transmitting said identification information stored in said storage unit only to said terminal extracted by said processor, among said plurality of terminals;
• and
• at least one of said plurality of terminals includes:
• an inquiry receiving unit receiving said inquiry transmitted from said information processing device,
• a reply signal transmitting unit, responsive to reception of said inquiry by said inquiry receiving unit, for determining whether or not said information reading device is connected to said terminal, forming said reply signal in accordance with the result of determination and transmitting the signal to said information processing device,
• a first identification information receiving unit receiving and storing in a prescribed identification information storage unit, said identification information transmitted from said information processing device, if it is determined that said information reading device is connected to the terminal,
• a determining unit determining whether or not the user is a registered user, based on said identification information stored in said identification information storage unit and on said information read by said information reading device, and
• a computer performing a prescribed process based on a result of determination by said determining unit,
• wherein said information processing device further includes an elapsed time determining unit determining whether or not a predetermined prescribed time period has passed from transmission of said identification information;
• wherein at least one of said plurality of terminals further includes a distribution acknowledgment signal transmitting unit transmitting a distribution acknowledgment signal, notifying successful reception of said identification information, to said information processing device;
• said information processing device further includes a distribution acknowledgment signal receiving unit receiving said distribution acknowledgment signal;
• and
• said first identification information transmitting unit includes a first re-transmitting unit for re-transmitting, if it is determined by said elapsed time determining unit that the predetermined prescribed time period has passed from transmission of said identification information, said identification information stored in said storage unit to said extracted terminal that has not yet transmitted said distribution acknowledgment signal, and
• said storage unit includes a distribution log information storage unit for further storing distribution destination information indicating a terminal as a transmission destination of said identification information, distribution date and time information indicating date and time of transmission of said identification information, and distribution status information indicating whether or not said terminal has successfully received the identification information, related to each other as distribution log information.