Jan 142018

via University College London

A method of securely communicating between multiple quantum devices has been developed by a UCL-led team of scientists, bringing forward the reality of a large-scale, un-hackable quantum network.

To date, communicating via quantum networks has only been possible between two devices of known provenance that have been built securely.

With the EU and UK committing €1 billion and £270 million* respectively into funding quantum technology research, a race is on to develop the first truly secure, large-scale network between cities that works for any quantum device.

“We’re in a technology arms race of sorts. When quantum computers are fully developed, they will break much of today’s encryption whose security is only based on mathematical assumptions. To pre-emptively solve this, we are working on new ways of communicating through large networks that don’t rely on assumptions, but instead use the quantum laws of physics to ensure security, which would need to be broken to hack the encryption,” explained lead author, Dr Ciarán Lee (UCL Physics & Astronomy).

Published in Physical Review Letters and funded by the Engineering and Physical Sciences Research Council, the study by UCL, the University of Oxford and the University of Edinburgh scientists details a new way of communicating securely between three or more quantum devices, irrespective of who built them.

“Our approach works for a general network where you don’t need to trust the manufacturer of the device or network for secrecy to be guaranteed. Our method works by using the network’s structure to limit what an eavesdropper can learn,” said Dr Matty Hoban (University of Oxford, previously University of Edinburgh).

The approach bridges the gap between the theoretical promise of perfect security guaranteed by the laws of quantum physics and the practical implementation of such security in large networks.

It tests the security of the quantum devices prior to engaging in communications with the whole network. It does this by checking if the correlations between devices in the network are intrinsically quantum and cannot have been created by another means.

These correlations are used to establish secret keys which can be used to encrypt any desired communication. Security is ensured by the unique property that quantum correlations can only be shared between the devices that created them, ensuring no hacker can ever come to learn the key.

The team used two methods – machine learning and causal inference – to develop the test for the un-hackable communications system. This approach distributes secret keys in a way that cannot be effectively intercepted, because through quantum mechanics their secrecy can be tested and guaranteed.

“Our work can be thought of as creating the software that will run on hardware currently being built to realise the potential of quantum communications. In future work, we’d like to work with partners in the UK national quantum technologies programme to develop this further. We hope to trial our quantum network approach over the next few years,” concluded Dr Lee.

The team acknowledge that an un-hackable network could be abused in the same way that current networks are, but highlight that there is also a clear benefit to ensuring privacy too.

Learn more: Developing a secure, un-hackable net


The Latest on: Quantum network
  • Serious quantum computers are finally here. What are we going to do with them?
    on February 23, 2018 at 9:04 pm

    What gives the IBMers hope is that even an imperfect quantum computer might still be a useful one. Dueling neural networks. Artificial embryos. AI in the cloud. Welcome to our annual list of the 10 technology advances we think will shape the way we work ... […]

  • Quantum-secure satellite communication
    on February 23, 2018 at 8:39 am

    The link is robust enough that information and images can be transmitted, as well as allowing a quantum-secured video conference call to be held between the Chinese and Austrian Academies of Sciences. A network of satellites could establish a worldwide ... […]

  • Rigetti Computing Releases Forest 1.3 Quantum Software Platform
    on February 23, 2018 at 12:00 am

    They did this by connecting one of their superconducting quantum processors, a 19-qubit system, to Forest. In the ten weeks since then, researchers have already used Forest to train neural networks, program benchmarking games, and simulate nuclear physics. […]

  • Is China winning ‘quantum race’ against the US?
    on February 20, 2018 at 7:26 am

    Then in early September last year, China set up its first commercial quantum network providing telephone and data communication services in its province of Shandong, which is expected to be soon connected to a non-commercial Beijing-Shanghai quantum network. […]

  • Quantum Networking Markets, 2026 - China Leads, European Flagships & The U.S.: A Need to Catch Up
    on February 19, 2018 at 4:30 am

    For the past 15 years, major service providers and research institutions worldwide have run quantum network trials. We are now entering a period in which permanent quantum networks are being built. These are designed initially to support quantum encryption ... […]

  • Global Quantum Networking Markets 2017-2026: Deployments, Components and Opportunities - ResearchAndMarkets.com
    on February 19, 2018 at 1:48 am

    For the past 15 years, major service providers and research institutions worldwide have run quantum network trials. We are now entering a period in which permanent quantum networks are being built. These are designed initially to support quantum encryption ... […]

  • The Quantum Internet Has Arrived (and It Hasn’t)
    on February 16, 2018 at 5:21 am

    A few years later, while working as a network-security specialist, Wehner went to university. There, she learnt that quantum mechanics offers something that today’s networks are sorely lacking—the potential for unhackable communications. Now she is ... […]

  • Quantum computer could have predicted Trump’s surprise election
    on February 16, 2018 at 12:00 am

    Predicting the outcome of a general election is a challenge. But combining quantum computing with neural network technology could improve forecasts, according to a new study that used just such a network to model the 2016 US presidential elections. […]

  • NBG is leading a new era of global civilian quantum communication
    on February 14, 2018 at 4:04 am

    Finally?a completely new era of secure social era will start! The fusion of quantum communication network and existing electronic communication network is the best development strategy. The concept of quantum mobile phones, quantum signatures, and quantum ... […]

  • NBG is the pioneer of global civilian quantum communication
    on February 13, 2018 at 9:22 am

    A safe and free social network has become an urgent pursuit of modern people and a hot topic in the era of big data. Quantum communication is regarded as the most security technology among the new generation of network information technology. It uses the ... […]

via Google News and Bing News

Other Interesting Posts

Leave a Reply

%d bloggers like this: