Wireless wallet

We present a framework for agreements in pervasive environments called the Universal Pervasive Transaction Framework (UPTF) for parties transacting in wireless insecure environments using mobile devices. We discuss one type of such agreement with commercial interest, namely mobile payments from a payer to a payee. We have implemented two complete systems for purchasing and payment with mobile devices utilizing UPTF. The first introduces a special purpose, new mobile device called the Universal Pervasive Transaction Device (UPTD) and the second utilizes J2ME-capable mobile phones.