Secure multi-party quantum conference and XOR computation

Abstract

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.

Measurement device–independent quantum secure direct communication with user authentication

“…Since then, QD has undergone rapid development over the past two decades [34,35,36,37,38,39,40,41]. Several QSDC protocols have been proposed for more than two parties, as discussed in [42,43,44,45,46,47,48,49,50]. These protocols extend the concept of QSDC to allow secure transmission of secret messages among multiple parties over a quantum channel.…”