Implantation of a system of hourly control through the digital imprint on the part of a public administration. The digital imprint has consideration of personal datum (art. 3 to) LOPD and 5.1 f) RLOPD). Its treatment is considered in agreement with the principles of proportionality and quality of the data (art. 4 LOPD), to be a suitable, pertinent and non excessive treatment in relation to the purpose of to control the fulfillment of the timetable of the workers, without necessary being to have its consent (art. 6.2 LOPD). However, it will be necessary to comply with the rest of principles and duties to the LOPD, especially, the duty of informing (art. 5 LOPD), the creation and inscription of the file (art. 20 LOPD) and the adoption of exigible safety measures, and if, the application of additional measures in attention to the nature of the treated information and the predictable risks, is proper.