The purpose of this paper is to consider the information and its bearing and implications in matters concerning security rather than the technological angle of information but instead.

The appreciation of the message, taken as the essence of information in any of its aspects, seeing it as a vehicle, means that it is always carrying something with an origin and a destination.

If we see it as a sign, it will represent first of all the sign of the existence of a sender and can, by itself, constitute a message in the sense of content, provided it has been agreed so between sender and receiver.

The content is the cargo the message carries as a vehicle. In this instance, the message can be misleading purportedly, to avoid the disclosure of its content and, in such a case, this زouterس content is in itself the container of an زinnerس secret content which bears the real meaning whose transmission is pursued.

The difference between these angles of view is that technology might be powerful and sophisticated enough as to bar the message as a vehicle, even as a sign although this is more difficult to assure, but it shall inevitably be at odds with contents.

Then, you can be watching anything coming from someone you suspect, but again, what if this suspect talks only about common, domestic subjects?

The basic idea is that security cannot be warranted only by technical means and devices, but needs a work of intelligence dealing with the ensemble of attitudes and trends as well in individual as in groups under suspicion or not, if it is needed to prevent, for instance, terrorists activities or other kind of criminal deeds.