Unhackable quantum comms for all

• Autores: Jacob Aron
• Localización: New scientist, ISSN 0262-4079, Nº. 3161, 2018, pág. 9
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • There's a new way to make sure quantum networks are secure. Theoretically, messages sent via quantum networks are protected by the laws of quantum mechanics. This is because any attempt to intercept information sent between two parties will disturb its fragile quantum state, revealing the eavesdropper. One way to check a quantum line is secure involves solving an equation called a Bell inequality--if the result exceeds a certain number, there is a limit to how much information a spy can extract without being detected. Ciaran Lee and his colleague Matty Hoban at the University of Oxford have found a better way. They have shown that a more complex version of the Bell inequality can provide the same security assurances for a network as the simpler version does for point-to-point contact