Anonymous conference key agreement in linear quantum networks

• URL: http://arxiv.org/abs/2205.09169v2
• Date: Tue, 5 Sep 2023 15:59:37 GMT
• Title: Anonymous conference key agreement in linear quantum networks
• Authors: Jarn de Jong, Frederik Hahn, Jens Eisert, Nathan Walk, Anna Pappa
• Abstract summary: Conference key agreement (CKA) is an extension of key distribution to multiple parties. CKA can also be performed in a way that protects the identities of the participating parties, therefore providing anonymity. We propose an anonymous CKA protocol for three parties that is implemented in a highly practical network setting.
• Score: 0.29998889086656577
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Sharing multi-partite quantum entanglement between parties allows for diverse secure communication tasks to be performed. Among them, conference key agreement (CKA), an extension of key distribution to multiple parties, has received much attention recently. Interestingly, CKA can also be performed in a way that protects the identities of the participating parties, therefore providing anonymity. In this work, we propose an anonymous CKA protocol for three parties that is implemented in a highly practical network setting. Specifically, a line of quantum repeater nodes is used to build a linear cluster state among all nodes, which is then used to anonymously establish a secret key between any three of them. The nodes need only share maximally entangled pairs with their neighbours, therefore avoiding the necessity of a central server sharing entangled states. This repeater setup makes our protocol an excellent candidate for implementation in future quantum networks. We explicitly prove that our protocol protects the identities of the participants from one another and perform an analysis of the key rate in the finite regime, contributing to the quest of identifying feasible quantum communication tasks for network architectures beyond point-to-point.

Related papers

• Towards efficient and secure quantum-classical communication networks [47.27205216718476]
  There are two primary approaches to achieving quantum-resistant security: quantum key distribution (QKD) and post-quantum cryptography (PQC) We introduce the pros and cons of these protocols and explore how they can be combined to achieve a higher level of security and/or improved performance in key distribution. We hope our discussion inspires further research into the design of hybrid cryptographic protocols for quantum-classical communication networks.
  arXiv  Detail & Related papers  (2024-11-01T23:36:19Z)
• Guarantees on the structure of experimental quantum networks [105.13377158844727]
  Quantum networks connect and supply a large number of nodes with multi-party quantum resources for secure communication, networked quantum computing and distributed sensing. As these networks grow in size, certification tools will be required to answer questions regarding their properties. We demonstrate a general method to guarantee that certain correlations cannot be generated in a given quantum network.
  arXiv  Detail & Related papers  (2024-03-04T19:00:00Z)
• Experimental anonymous quantum conferencing [72.27323884094953]
  We experimentally implement the AQCKA task in a six-user quantum network using Greenberger-Horne-Zeilinger (GHZ)-state entanglement. We also demonstrate that the protocol retains an advantage in a four-user scenario with finite key effects taken into account.
  arXiv  Detail & Related papers  (2023-11-23T19:00:01Z)
• Establishing shared secret keys on quantum line networks: protocol and security [0.0]
  We show the security of multi-user key establishment on a single line of quantum communication. We consider a quantum communication architecture where qubit generation and measurement happen at the two ends of the line.
  arXiv  Detail & Related papers  (2023-04-04T15:35:23Z)
• Experimental anonymous conference key agreement using linear cluster states [0.0]
  Greenberger-Horne-Zeilinger (GHZ) states have been introduced as resource states for anonymous key exchange protocols. Here we demonstrate that linear cluster states can serve as a versatile and potentially scalable resource in such applications.
  arXiv  Detail & Related papers  (2022-07-19T18:02:24Z)
• Conference key agreement in a quantum network [67.410870290301]
  Quantum conference key agreement (QCKA) allows multiple users to establish a secure key from a shared multi-partite entangled state. In a quantum network, this protocol can be efficiently implemented using a single copy of a N-qubit Greenberger-Horne-Zeilinger (GHZ) state to distil a secure N-user conference key bit.
  arXiv  Detail & Related papers  (2022-07-04T18:00:07Z)
• Secure Anonymous Conferencing in Quantum Networks [0.0]
  We introduce a security framework for anonymous conference key agreement with different levels of anonymity. We present efficient and noise-tolerant protocols exploiting multipartite Greenberger-Horne-Zeilinger (GHZ) states. Our results strongly advocate the use of multipartite entanglement for cryptographic tasks involving several users.
  arXiv  Detail & Related papers  (2021-11-09T19:09:34Z)
• Quantum communication complexity beyond Bell nonlocality [87.70068711362255]
  Efficient distributed computing offers a scalable strategy for solving resource-demanding tasks. Quantum resources are well-suited to this task, offering clear strategies that can outperform classical counterparts. We prove that a new class of communication complexity tasks can be associated to Bell-like inequalities.
  arXiv  Detail & Related papers  (2021-06-11T18:00:09Z)
• Anonymous and secret communication in quantum networks [0.0]
  We implement an anonymous quantum conference key agreement by sharing multipartite entangled states in a quantum network. We demonstrate the protocol with four parties and establish keys in subsets of the network. We additionally show that the protocol is verifiable and run multiple key generation and verification routines.
  arXiv  Detail & Related papers  (2021-03-15T21:07:25Z)
• Anonymous Conference Key Agreement in Quantum Networks [0.0]
  Quantum Conference Key Agreement (CKA) is a cryptographic effort of multiple parties to establish a shared secret key. We provide the first protocol for Anonymous Quantum Conference Key Agreement.
  arXiv  Detail & Related papers  (2020-07-15T21:17:41Z)
• Experimental quantum conference key agreement [55.41644538483948]
  Quantum networks will provide multi-node entanglement over long distances to enable secure communication on a global scale. Here we demonstrate quantum conference key agreement, a quantum communication protocol that exploits multi-partite entanglement. We distribute four-photon Greenberger-Horne-Zeilinger (GHZ) states generated by high-brightness, telecom photon-pair sources across up to 50 km of fibre.
  arXiv  Detail & Related papers  (2020-02-04T19:00:31Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.