Quantum-secured network ‘virtually un-hackable’

Quantum-secured network ‘virtually un-hackable’

A 75-mile, quantum-secured, high-speed fiber link has been built in the United Kingdom, the largest internet supplier there has said.

Particles of light, known as photons, carry encryption keys over the same connection as data. Hijacking those photons within the link immediately notifies the system that the keys have become bad — the thief interfering with those keys alters them and then they can’t be used by the interceptor — and the traffic becomes garbled instantly.

It’s “virtually un-hackable,” said Gavin Patterson, outgoing BT chief executive, announcing the link at Internet of Things World Europe that I attended in London last month.

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