Non-repudiation Mechanism of Agent-based Mobile Payment Systems: Perspectives on Wireless PKI

Non-repudiation of a mobile payment transaction ensures that when a buyer (b) sends some messages to a seller (s), neither b nor s can deny having participated in this transaction. an evidence of a transaction is generated by wireless pki (wpki) mechanism such that b and s cannot repudiate sending and receiving the purchase order respectively. broker generates a mobile agent for b which carries encrypted purchase order to s. a trusted third party (ttp) acts as a lightweight notary for evidence generations. one advantage of this agent-based non-repudiation protocol is to reduce inconvenience for mobile clients such as connection time and search for suitable merchant servers, etc.; it provides necessary security mechanisms for fair mobile payment transactions.