TY  - EJOU
AU  - Zhong, Jifeng  
AU  - Liu, Zhihao  
AU  - Xu, Juan  

TI  - Analysis and Improvement of an Efficient Controlled Quantum Secure Direct Communication and Authentication Protocol
T2  - Computers, Materials \& Continua

PY  - 2018
VL  - 57
IS  - 3
SN  - 1546-2226

AB  - The controlled quantum secure direct communication (CQSDC) with authentication protocol based on four particle cluster states via quantum one-time pad and local unitary operations is cryptanalyzed. It is found that there are some serious security issues in this protocol. An eavesdropper (Eve) can eavesdrop on some information of the identity strings of the receiver and the controller without being detected by the selective-CNOT-operation (SCNO) attack. By the same attack, Eve can also steal some information of the secret message that the sender transmits. In addition, the receiver can take the same kind of attack to eavesdrop on some information of the secret message out of the control of the controller. This means that the requirements of CQSDC are not satisfied. At last, we improve the original CQSDC protocol to a secure one.
KW  - Quantum cryptography
KW  -  controlled quantum secure direct communication
KW  -  selective-CNOT-operation attack

DO  - 10.32604/cmc.2018.03706