EU seeks quantum cryptography response to Echelon

The European Union is to invest €11 million ($13 million) over the next four years to develop a secure communication system based on quantum cryptography, using physical laws governing the universe on the smallest scale to create and distribute unbreakable encryption keys, project coordinators said Monday.

If successful, the project would produce the cryptographer's holy grail -- absolutely unbreakable code -- and thwart the eavesdropping efforts of espionage systems such as Echelon, which intercepts electronic messages on behalf of the intelligence services of the U.S., the U.K., Canada, New Zealand and Australia.

"The aim is to produce a communication system that cannot be intercepted by anyone, and that includes Echelon," said Sergio Cova, a professor from the electronics department of Milan Polytechnic and one of the project's coordinators. "We are talking about a system that requires significant technological innovations. We have to prove that it is workable, which is not the case at the moment." Major improvements in geographic range and speed of data transmission will be required before the system becomes a commercial reality, Cova said.

"The report of the European Parliament on Echelon recommends using quantum cryptography as a solution to electronic eavesdropping. This is an effort to cope with Echelon," said Christian Monyk, the director of quantum technologies at the Austrian company ARC Seibersdorf Research and overall coordinator of the project. Economic espionage has caused serious harm to European companies in the past, Monyk said. "With this project we will be making an essential contribution to the economic independence of Europe."

Quantum cryptography takes advantage of the physical properties of light particles, known as photons, to create and transmit binary messages. The angle of vibration of a photon as it travels through space -- its polarization -- can be used to represent a zero or a one under a system first devised by scientists Charles Bennett and Gilles Brassard in 1984. It has the advantage that any attempt to intercept the photons is liable to interfere with their polarization and can therefore be detected by those operating the system, the project coordinators said. An intercepted key would therefore be discarded and a new one created for use in its place.

The new system, known as SECOQC (Secure Communication based on Quantum Cryptography), is intended for use by the secure generation and exchange of encryption keys, rather than for the actual exchange of data, Monyk said.

"The encrypted data would then be transmitted by normal methods," he said. Messages encrypted using quantum mechanics can currently be transmitted over optical fibers for tens of kilometers. The European project intends to extend that range by combining quantum physics with other technologies, Monyk said. "The important thing about this project is that it is not based solely on quantum cryptography but on a combination with all the other components that are necessary to achieve an economic application," he said. "We are taking a really broad approach to quantum cryptography, which other countries haven't done."

The IDG News Service is a Network World affiliate.