ABSTRACT
Mobile payment is defined as mobile money, which is considered as an attractive alternative for cash, cheque, or credit. In this paper we propose a new secure mobile payment method. This method is summarized in three processes: firstly, the authentication process, which involves the authentication phases for the applied customers. Secondly, the member recognition process which tests and ensures the customer membership by the market server. Finally, payment process which will be done by ciphering the customer information using public-key encryption cryptosystem (RSA), to be submitted over an insecure network to the market server. Actually, this mobile payment method is more efficient than other payment methods since the customer can pay from his/her own mobile phone without any extra cost and effort. The RSA public-key encryption system ensures the security of the proposed method. However, to prevent a brute force attack, the choice of the key size becomes crucial.