Entanglement Verification in Quantum Networks with Tampered Nodes
This addresses security vulnerabilities in quantum networks for applications like quantum communication, though it is incremental as it builds on existing verification methods.
The paper tackles the problem of verifying entanglement in quantum networks to detect intruders who have taken control of nodes, proposing two LOCC-based protocols with improved robustness and efficiency.
In this paper, we consider the problem of entanglement verification across the quantum memories of any two nodes of a quantum network. Its solution can be a means for detecting (albeit not preventing) the presence of intruders that have taken full control of a node, either to make a denial-of-service attack or to reprogram the node. Looking for strategies that only require local operations and classical communication (LOCC), we propose two entanglement verification protocols characterized by increasing robustness and efficiency.