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A method known as quantum key distribution has long held the promise of communication security unattainable in conventional cryptography. An international team of scientists, including ETH physicists, has now demonstrated experimentally, for the first time, an approach to quantum key distribution that uses high-quality quantum entanglement to provide much broader security guarantees than previous schemes.

Letting your curiosity run free, asking a thousand questions and learning something new. On 17 June 2022, the Department of Physics at ETH Zurich welcomed several thousand guests at the summer festival of science on the Hönggerberg campus, the Night of Physics 2022.