P^22P - Prepaid Peer-to-Peer Services

Since the early days of file sharing, the quest for incentives persuading users to contribute resources to P2P networks exists. Crediting and debiting users' accounts for consumptions and contributions is surely one possibility. But how to do this without enormous additional overhead or infrastructure? We depict a solution to this question by describing the establishment of a lightweight, secure prepaid charging mechanism within a P2P network