Cryptographers Achieve Perfect Secrecy With Imperfect Devices | Quanta Magazine - Quanta Magazine

( February 25, 2022; Quanta Magazine )

_Description_:
"For the first time, experiments demonstrate the possibility of
sharing secrets with perfect privacy — even when the devices used to share
them cannot be trusted."

But almost from the devices’ conception three decades ago, there were
hints that these vulnerabilities might not be a problem. Theorists went
on to prove that, amazingly, all the users had to do to ensure privacy
was to have the devices play a game. Simply winning — with a high enough
score — would prove that no one else could be listening. Now, two
different experiments based in Oxford and Munich have demonstrated this
process, known as device-independent quantum key distribution. A third
experiment, based in Shanghai, concurrently demonstrated many of the
necessary requirements. Each of the three groups of researchers had to
carefully engineer complete cryptographic systems out of quantum
components.

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Cryptographers
Achieve Perfect Secrecy With Imperfect Devices | Quanta Magazine

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