Google Authenticator
Google Authenticator provides two-factor authentication (2FA) for user accounts. It adds an extra layer of security to online accounts by requiring not only a password but also a unique, time-based, one-time passcode (OTP) generated by the app. The code will be generated by Google whether users are online or offline.
Google Authenticator is easy to set up and can protect companies against phishing. It is compatible with a range of services and systems, including Polonious.