There is only authentication of end-to-end in electronic commerce technique. But in a distributed system, an authentication that is ensured users and computers has a big threats which an identify of those is unbelievable because it can be occurred an fabrication or a false personation. Authentication for other elements included customers and vendors is required in the case that there is many a broker connecting customers with vendors as well. In authentication like above, many elements playing different role participated, were performed by the known techniques, processing was more complicated. In this paper, the Mutual Indirect Authentication technique is used to solve and avoid that condition and the generalized electronic commerce using a mobile agent is accomplished with this technique.