The International Journals of Engineering & Sciences (IJENS)
E-commerce is buying and selling through the Internet where the payment process is electronic. Electronic payment (e-payment) is the critical support phase of e-commerce contains sensitive data in transactions and consequently, it must be secure. Therefore, a security protocol (cryptographic protocol) is used in the transaction between parties, and it must be satisfy security properties. In this paper, the authors study e-payment phase in SET protocol. They found it still has problems of huge and complex transactions processes and not fully satisfy security properties.