Efficient Controlled Quantum Secure Direct Communication Protocols

Abstract

We study controlled quantum secure direct communication (CQSDC), a cryptographic scheme where a sender can send a secret bit-string to an intended recipient, without any secure classical channel, who can obtain the complete bit-string only with the permission of a controller. We report an efficient protocol to realize CQSDC using Cluster state and then go on to construct a (2-3)-CQSDC using Brown state, where a coalition of any two of the three controllers is required to retrieve the complete message. We argue both protocols to be unconditionally secure and analyze the efficiency of the protocols to show it to outperform the existing schemes while maintaining the same security specifications.

9 pages

References in corpus (4)

• Perfect Teleportation, Quantum state sharing and Superdense Coding through a Genuinely Entangled Five-qubit State
• Quantum information splitting using multi-partite cluster states
• Quantum secure direct communication based on order rearrangement of single photons
• Quantum teleportation and state sharing using a genuinely entangled six qubit state