2 research outputs found
Controller-independent bidirectional quantum direct communication
Recently, Chang et al (Quantum Inf Process,14,3515,2015) proposed a
controlled bidirectional quantum direct communication protocol using Bell
states. In this work, the significance of Bell states, which are being used as
initial states in Chang et al. protocol, is elucidated. The possibility of
preparing initial state based on the secret message of the communicants is
explored. In doing so,the controller-independent bidirectional quantum direct
communication protocol has evolved naturally. It is shown that any communicant
cannot read the secret message without knowing the initial states generated by
the other communicant. Further,intercept and resend attack and information
leakage can be avoided. The proposed protocol is like a conversion between two
persons without the help of any third person with high-level security.Comment: 11 Page
Efficient Controlled Bidirectional Quantum Secure Direct Communication using entanglement swapping in a network
In this paper, a novel controlled bidirectional quantum secure direct
communication protocol (CBQSDC) is proposed. In this scheme, both users can
transmit their secret messages directly and simultaneously under the permission
of the controller. The proposed method use feature of entanglement swapping
which is led to more efficiency (lowest number of quantum resources (EPR
pairs)), security and the lowest number of security checking steps. Also, a
generalization of the protocol is explained and a protocol of CBQSDC-based
network is presented