Secure Multi-Party Quantum Conference and Xor Computation
This work addresses security vulnerabilities in quantum communication for multi-party scenarios, offering incremental improvements over prior protocols.
The authors tackled the problem of insecure quantum communication protocols by modifying an existing Measurement Device Independent Quantum Dialogue (MDI-QD) protocol to make it secure against intercept-and-resend attacks, generalizing it to multi-party quantum conferences and proposing a new quantum multi-party XOR computation protocol, all without using entanglement and with proven correctness and security.
Quantum conference is a process of securely exchanging messages between three or more parties, using quantum resources. A Measurement Device Independent Quantum Dialogue (MDI-QD) protocol, which is secure against information leakage, has been proposed (Quantum Information Processing 16.12 (2017): 305) in 2017, is proven to be insecure against intercept-and-resend attack strategy. We first modify this protocol and generalize this MDI-QD to a three-party quantum conference and then to a multi-party quantum conference. We also propose a protocol for quantum multi-party XOR computation. None of these three protocols proposed here use entanglement as a resource and we prove the correctness and security of our proposed protocols.