Vienna - Using quantum physics, researchers said they communicated for the first time via a completely tap-proof telephone network in Vienna on Wednesday.
Scientists involved in the SECOQC project, funded by the European Union, found a way to create an encryption key based on the polarisation of photons, subatomic particles that carry light.
"Classic keys can be hacked by supercomputers, but not in this case," said Anton Zeilinger, a quantum physicist at the Vienna University.