Electronic ticket system, collecting terminal, service providing terminal, user terminal, electronic ticket correcting method and recording medium

摘要

A collecting agency (4) supplies a collecting agency name and a money bag number to a service providing terminal (3). In response to dealing requests from user terminals (2), the service providing terminal (3) sends, to the user terminals (2), information which contains the collecting agency name (Id) and the money bag number (Gb) supplied from the collecting agency (4). The user terminals (2) generate digital signatures containing the received request information, affix the generated signatures to electronic tickets to be used, and send the electronic tickets with the signatures to the service providing terminal (3). The service providing terminal (3), which has received the used electronic tickets, collects those electronic tickets which include the same money bag number supplied from the collecting agency (4) into a group (a money bag), and sends the group of electronic tickets to the collecting agency (4).