An identification system to access the part restricted of a web, based exclusively on a user coincident with the number of DNI a suitable system of identification and authentication is not. The publication of the number of DNI in a space of formation that does not aim at introducing the results of the evaluations does not find habilitation legal to the additional disposal 21st, point 3, of the organic Law 4/2007, of 12 April, for the one that modifies the organic Law 6/2001, of 21 December, of Universities.