If you want to secure access to your accounts on the different services you use, one of the options you have is two-factor authentication. Duo Mobile provides that extra layer of security.
Your user accounts protected by two-factor authentication
This application offers its users the ability to manage so-called two-factor authentication for applications and web services requiring credentials. This means that if you access, for example, your Facebook account, a notification is sent to your device so that in addition to the social network password, you allow access from your phone .
To use this service, simply activate Duo and connect it to your account. Once you have received the activation link, you can then add third party accounts. Access to these can be authorized by "push" notifications or by QR codes, for which the application must access the camera permissions. It also offers the possibility to check access to the service and therefore to ensure that everything is correctly protected.