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The world is witnessing an ever-growing demand for communications services. This is being supported by a fast increase in transmission and switching capacity in networks.

Two of the major issues in these networks are privacy and security. These two issues have been covered, up to now, by using public key cryptosystems. These systems can use a rather short secret parameter, known as the key, or they can encipher directly the message.

The continuous increase of computer speed threatens the safety of these procedures. An alternative simple way to improve the security of an encrypted message can be realised by additionally encoding at the physical layer using chaotic carriers generated by components operating in the non-linear regime. This will be the goal of this project.

This project is being carried out by different universities and companies of various european countries.