A Time-based One-time Password (TOTP) algorithm is a method to
compute a one time password based upon a shared secret between
the server and the user. This password is only valid for a period
of 30 seconds.
The configuration of the shared secret is done via the scan
of a QR code generated by the server. This code is scanned
by a TOTP application on a smartphone.
FreeOTP or GoogleAuthenticator are two applications available
on the Apple App Store for Iphones or the GooglePlay for Android.
A lot of other applications can be used.
FreeOTP is downloadable here:
Once the application is installed, you are able to scan a
configuration QR code related to your account.
Here you have an example of configuration QR code:
The TOTP value is a set of 6 digits, changing every 30 seconds.
The current TOTP value is: