Cryptanalysis and improvement of three-particle deterministic secure and high bit-rate direct quantum communication protocol

• DOI: 10.1007/s11128-014-0732-z
• Publication Date: 2014-01-27T09:24:15Z
• Authors: Zhi-Hao Liu; Han-Wu Chen; Dong Wang; Wen-Qian Li
• Keywords: Communication source

The three-particle deterministic secure and high bit-rate direct quantum communication protocol and its improved version are analyzed. It shows that an eavesdropper can steal the sender's secret message by the intercept-resend attack and the entanglement attack. The original version is even fragile under denial-of-service attack. As a result, some suggestions to revise them are given.