Utilization of the number of DNI to access a system of information of a town council

The establishment of a mechanism of identification and of authentication based on the use of a user (consistent in the number of DNI) and of a password for those workers that, by virtue of its condition of staff of a sub person in charge of the treatment, have to be able to access a system of information to exercise the functions that they have ordered, a suitable safety measure could be considered, with juridical basis in the article 6.1.b) of the RGPD, since it is necessary for the execution of the contract.