The three greatest and deep-seated problems common to maritime transportation and harbour security are direct results of human behaviour and may be divided into the categories of piracy, terrorism and organised crime.

In this paper, due to time and space constraints, only terrorism and piracy will be discussed. Organised crime will not be addressed because it so complicated that warrants being dealt with separately.

The analysis will begin by focusing on our present knowledge of current state and international legislation, and will attempt to answer the following questions: What is the current situation of maritime terrorism and piracy, and what kinds of future developments may be expected? Particular attention will be paid to cyber warfare, which can be considered today's and tomorrow's single most crucial threat to the maritime system.