1. A method for authenticating users for accessing a secured testing service, the method comprising: receiving a request from a user to access the secured testing service, the secured testing service associated with one or more access conditions and configured for delivery through online configured browser applications executing on devices of end users; processing at least one image of a face of the user captured by a camera of a device of the user; authorizing access to the secured testing service based on the at least one processed image and the one or more access conditions associated with the secured testing service; and responsive to authorizing the access, distributing the secured testing service to the user by a browser application executing on the user's device.