Taobao shopping payment-how to open SMS confirmation?

Install a digital certificate in the computer. After installing the digital certificate, if the amount of a single transaction exceeds 200, it will be confirmed by SMS. Moreover, after downloading the certificate, if you are on a computer without a digital certificate, you can't pay for the transaction unless you cancel the digital certificate! But when shopping by mobile phone, unless it exceeds 200, it will not affect the transaction! If you only use your computer at home, it is recommended to install a digital certificate to improve security!