Secure One-way Mobile Payment System Keeping Low Computation in Mobile Devices

Abstract

In this paper, we present a secure one-way mobile payment system that executes only two modular multiplications, one modular inverse and two hashings by the customer using two public key pairs and keyed hash function. Thus the customer(i.e. mobile device) conserves low computation load without any expensive modular exponentiation required for RSA or Diffie-Hellman operation. In addition, as the customer need not participate in the deposit phase, only one unilateral communication from the customer to the vendor is sufficient to complete payment. These characteristics will make our scheme easily applicable to the mobile environments. The security of the proposed mobile payment system is proved to be equivalent to the intractability of the discrete logarithm