＜p＞The buzz in the web market is two-factor authentication (also known as TFA, 2FA, two-step verification, multi-factor authentication). Many users hold multiple accounts on multiple websites, and most of them use the same password for multiple accounts. If their password is hacked on one website, their accounts on other websites get vulnerable too. Passwords are not secure enoughーif someone gets your password, they can easily access your account and can do anything with your account like deleting your data, sharing your sensitive data with the public, hijacking, etc. ＜/p＞画面が切り替わりますので、しばらくお待ち下さい。 ※ご購入は、楽天kobo商品ページからお願いします。※切り替わらない場合は、こちら をクリックして下さい。 ※このページからは注文できません。