Controlled quantum key agreement based on maximally three-qubit entangled states
Jie Tang, Lei Shi, Jiahua Wei
Abstract
In this paper, we propose a two-party and a three-party controlled quantum key agreement (QKA) protocols with three-qubit GHZ states and Bell measurements. Compared with previous protocols, the significant change of our schemes is that a supervisor is introduced for controlling the agreement process to improve the controllability. Moreover, our protocols ensure each communication participant contribute equally to the agreement keys, and all participants can negotiate the shared keys without exchanging classical bits between them. The performance analysis shows that our protocols can be immune to outsider and participant attack.
Topics & Concepts
QubitComputer scienceKey (lock)ControllabilityQuantumProtocol (science)SupervisorTopology (electrical circuits)Theoretical computer scienceQuantum mechanicsPhysicsComputer securityMathematicsPolitical scienceLawApplied mathematicsAlternative medicineCombinatoricsPathologyMedicineQuantum Information and CryptographyQuantum Mechanics and ApplicationsQuantum Computing Algorithms and Architecture