Electronic commerce has attracted much attention with the development of security technology on the Internet. We established an electronic commerce system that is based on NTT electronic money technology and is connected with the Japanese banking system. It has been operated in the InternetCash trial step2 since April 1999. The aim of this trial is to evaluate the security features of NTT electronic money and to verify the merits of electronic money for consumers and other parties concerned. In this paper, we introduce the whole service concept of this trial, discuss the problems and solutions related to the design of the system, and report on the current results of the trial.