TY - JOUR AB - 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. © 2014 Springer Science+Business Media New York. AU - Liu, ZH AU - Chen, HW AU - Wang, D AU - Li, WQ DA - 2014/01/01 DO - 10.1007/s11128-014-0732-z EP - 1351 JO - Quantum Information Processing PY - 2014/01/01 SP - 1345 TI - Cryptanalysis and improvement of three-particle deterministic secure and high bit-rate direct quantum communication protocol VL - 13 Y1 - 2014/01/01 Y2 - 2026/07/17 ER -