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Secure communication using quantum physics?

Who communicates on the Internet, leaves traces. Viennese researchers have now developed a process which makes the communication even in a larger network eavesdropping.

quantum cryptography is to enable, in the future, tap-proof communication on the Internet. Austrian researchers have now taken after their own data - an important hurdle on this path. You managed that four participants of a network have to communicate tap-proof. The scientists, Rupert Ursin from the Vienna Institute for quantum optics and quantum information of the Austrian Academy of Sciences presented their research in the British journal "Nature". According to the scientists, the network is easy to expand and might come for a broad application in question.

Conventional encryption technologies offer only relative protection, says Rupert Ursin of the Academy of Sciences in an interview with the ORF. "If I mail reading my E -, could make a third party, in principle, arbitrarily many copies of it - and no one would notice. In the case of the quantum cryptography is impossible. If hackers trying to eavesdrop on a quantum message, leave inevitably a trace. This is a law of nature."

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