Such concept as intellectual property which can be in the broadest sense defined as commercially valuable ideas is connected with a trade secret. It is not obligatory that it was something new or patented. The main thing that information was not among the well-known.
So, the personnel - one of the main channels of information leakage. Knowing it, it is necessary to study biographies of especially important employees more carefully. It is necessary to pay close attention on again come to work, and to those who is subject to dismissal. These people are in the situations optimum for information leakage.