Content usage management system method, and program providing medium therefor

摘要: When the encrypted content is provided from a service provider to user device, usage log including information of fee created in device. The then sent provider. compares received with predetermined threshold. If found exceed threshold, requests clearing center inquire about electronic money balance user. it determined that seems difficult collect user, transmission key suspended. also creates an issue which effective period and allowable amount spent by are set, performs settlement processing only when payment has been made within period.