Hollow core fiber has a hollow center filled with air, which runs the entire length of the cable and is encased in a ring of glass.
Image: BT / Lumenisity
A new type of optical fiber filled with nothing but thin air has been found to be particularly effective to carry out quantum key distribution (QKD), a security protocol that is in principle un-hackable and could play a key role in protecting sensitive data against ever-more sophisticated cyber-attacks.
BT experimented with QKD over a six-kilometer-long cable of hollow core fiber, a technology that it has been working on for the past few months as an alternative to traditional fiber optic cables.
Optical fiber is typically made of solid strands of glass that carry information by channeling light signals emitted by laser transmitters. Hollow core fiber, on the other hand, has a hollow center filled with air, which runs the entire
The article Quantum cryptography: This air-filled fiber optic cable can transport un-hackable keys, say researchers originally appeared on ZDNet.