A two-factor authentication system has been replaced by a three-factor system which is more secure but less convenient.

双重认证变成了三重认证，虽然提高了安全性，但却更不方便了。

youdao

A two-factor authentication system has been replaced by a three-factor system which is more secure but less convenient.

双重认证变成了三重认证，虽然提高了安全性，但却更不方便了。

youdao