Security News > 2020 > September > Researchers develop secure multi-user quantum communication network

The world is one step closer to having a totally secure internet and an answer to the growing threat of cyber-attacks, thanks to a team of international scientists who have created a multi-user quantum communication network which could transform how we communicate online.

The invention led by the University of Bristol has the potential to serve millions of users, is understood to be the largest-ever quantum network of its kind, and could be used to secure people's online communication, particularly in these internet-led times accelerated by the COVID-19 pandemic.

Lead author Dr Siddarth Joshi, who headed the project at the university's Quantum Engineering Technology Labs, said: "This represents a massive breakthrough and makes the quantum internet a much more realistic proposition. Until now, building a quantum network has entailed huge cost, time, and resource, as well as often compromising on its security which defeats the whole purpose."

How the multi-user quantum communication network works.

To demonstrate its functionality across distance, the receiver boxes were connected to optical fibres via different locations across Bristol and the ability to transmit messages via quantum communication was tested using the city's existing optical fibre network.

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