Also, inserting a smart card into a reader linked to a desktop computer can prevent unauthorized people from using the machine and allow the valid owner to encrypt e-mail.

• 此外，只要把智慧卡插进连接桌上型电脑的读卡机，就能防止未经授权的人使用该电脑，也能让合法的使用者进行电子邮件加密的动作。