You can make your myNVivo profile/account more secure by enabling two-step verification. Turn this on on the Edit Profile page opened from the Settings menu.
With two-step verification you must install an authentication app on your phone. After setup, every time you use your 'QSR account' login credentials to log into a QSR International product or portal you must provide a code from the app as well as the credentials.
To set up two-step verification, click the switch on the Edit Profile page and follow the instructions: install an authenticator app on your phone, use it to scan the barcode provided, then copy the code from the app.