A micro-payment scheme for multiple-vendor in m-commerce

The micro-payment is an important technique in m-commerce (mobile commerce). Micro-payment refers to low-value financial transactions ranging from several cents to a few dollars. The cost of micro-payments should be kept as low as possible in order for the service provider to profit from the low-value transactions. In recent years, many micro-payment schemes have been proposed. But many of them don't apt to multiple-vendor. We propose a micro-payment scheme that is able to apply to multiple-vendor for m-commerce. Our scheme satisfies the requirements of a payment system and is "cheap " in terms of computation costs, communication costs, and key management costs