A system and method for conducting electronic commerce are disclosed. In various embodiments, the electronic transaction is a purchase transaction. A user is provided with an intelligent token, such as a smartcard containing a digital certificate. The intelligent token suitably authenticates with a server...http://www.google.com.hk/patents/US8214299?utm_source=gb-gplus-share專利 US8214299 - Methods and apparatus for conducting electronic transactions
