A method for facilitating a wireless transaction includes receiving, by a transaction management system, a transaction request and a spoken authentication code from a transaction requester. After authenticating the spoken authentication code, a transaction code is communicated from the transaction management...http://www.google.com.hk/patents/US7240036?utm_source=gb-gplus-share專利 US7240036 - Method and system for facilitation of wireless e-commerce transactions
