The present invention concerns a device for securing an enclosed space by identifying the persons authorized to access, including: (i) at least one “human detection system” (3) whose issue(s) activate the entry(ies) (8b) of one or several comparator modules (8); (ii) identification units (i) of the aforesaid types able to communicate with the identification receiver(s) (2) in order to activate the entry(ies) (8a) of one or several comparator modules (8); and (iii) at least one, better several comparator modules (8) characterized by the fact that its (their) issue (8c) will be activated only if the entry (8b) of this same module has been activated, and the other entry (8a) has not been activated alter an adjustable delay. This device is characterized by the fact that an authorized person wears an identifying device which automatically allows the inhibition of the alarm system, which has been previously activated by human detectors.