A key role for quantum entanglement

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.

by Andreas Trabesinger, with contributions from the international research team
Artistic representation of device-independent quantum key distribution
Artistic representation of device-independent quantum key distribution (DIQKD).
 (Graphics: Scixel/Enrique Sahagú)
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