3 research outputs found
Differentiated Service Entanglement Routing for Quantum Networks
The entanglement distribution networks with various topologies are mainly
implemented by active wavelength multiplexing routing strategies. However,
designing an entanglement routing scheme, which achieves the maximized network
connections and the optimal overall network efficiency simultaneously, remains
a huge challenge for quantum networks. In this article, we propose a
differentiated service entanglement routing (DSER) scheme, which firstly finds
out the lowest loss paths and supported wavelength channels with the
tensor-based path searching algorithm, and then allocates the paired channels
with the differentiated routing strategies. The evaluation results show that
the proposed DSER scheme can be performed for constructing various large scale
quantum networks.Comment: 25 pages, 14 figure
Secure Anonymous Conferencing in Quantum Networks
Users of quantum networks can securely communicate via so-called (quantum) conference key agreement—making their identities publicly known. In certain circumstances, however, communicating users demand anonymity. Here, we introduce a security framework for anonymous conference key agreement with different levels of anonymity, which is inspired by the ε-security of quantum key distribution. We present efficient and noise-tolerant protocols exploiting multipartite Greenberger-Horne-Zeilinger (GHZ) states and prove their security in the finite-key regime. We analyze the performance of our protocols in noisy and lossy quantum networks and compare with protocols that only use bipartite entanglement to achieve the same functionalities. Our simulations show that GHZ-based protocols can outperform protocols based on bipartite entanglement and that the advantage increases for protocols with stronger anonymity requirements. Our results strongly advocate the use of multipartite entanglement for cryptographic tasks involving several users
Secure Anonymous Conferencing in Quantum Networks
Users of quantum networks can securely communicate via so-called (quantum) conference key agreement—making their identities publicly known. In certain circumstances, however, communicating users demand anonymity. Here, we introduce a security framework for anonymous conference key agreement with different levels of anonymity, which is inspired by the ε-security of quantum key distribution. We present efficient and noise-tolerant protocols exploiting multipartite Greenberger-Horne-Zeilinger (GHZ) states and prove their security in the finite-key regime. We analyze the performance of our protocols in noisy and lossy quantum networks and compare with protocols that only use bipartite entanglement to achieve the same functionalities. Our simulations show that GHZ-based protocols can outperform protocols based on bipartite entanglement and that the advantage increases for protocols with stronger anonymity requirements. Our results strongly advocate the use of multipartite entanglement for cryptographic tasks involving several users