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Quantum Internet

01 /How to secure communication 02 /Introduction to the Quantum Internet 03 /Quantum Internet: road-map, labs and protocols 04 /What is a Quantum Internet? 05 /Tasks for a quantum internet 06 /Applications of a Quantum Internet 07 /Quantum Key Distribution using BB84 08 /Quantum Teleportation 09 /Blind Quantum Computing 10 /Distributed Systems 11 /Elements of a Quantum Internet 12 /Why is quantum internet superior to post-quantum cryptography 13 /Repeaters 14 /Why making quantum repeaters is hard 15 /Introducing entanglement distillation

Why is quantum internet superior to post-quantum cryptography

Many groups all over the world are putting in a lot of effort to build the quantum internet. But why do we spend so much time researching, for example, quantum repeaters and quantum-key distribution (QKD) protocols towards this quantum internet, when we appear to have a suitable alternative: post-quantum cryptography?

As professor Stephanie Wehner explains in this video, there is one crucial difference between post-quantum cryptography and QKD protocols using the Quantum Internet. Ultimately one method can improve the other.

Prerequisite knowledge

 

Further thinking

In the video, professor Wehner mainly addresses the use of quantum repeaters and the Quantum Internet towards secure communication. Can you think of another use case of the Quantum Internet, thus giving another argument why research into quantum repeaters is valid?

Solution

Further reading

Read more about the difference between quantum-key-distribution (QKD) and post-quantum cryptography in this infographic: