中文摘要：

约瑟夫森结的混沌行为在研究和应用方面都具有重要的价值。电阻-电容-电感并联约瑟夫森结在直流电流的驱动下会出现混沌行为，采用数值计算的方法，对混沌行为进行了研究。通过电压波形、频谱、对初始条件的敏感依赖以及奇怪吸引子，证实了混沌的存在，在此基础上首次提出了基于约瑟夫森结混沌行为的保密通信方案。

英文摘要：

Chaotic behaviors of Josephson junctions are of great value in research and applications. The resistively- capacifively- inductively shunted Josephson junctions exhibit chaotic behaviors, when driven by dc current. The chaotic dynamics of the junction were investigated by using numerical method. The existence of the chaos was proved by the voltage waveform, the spectrum, the sensitivity to initial conditions and the strange attractor. For the first time, a new chaotic secure communication scheme based on the Josephson junction chaos was developed. Results show the scheme can be used in secure communications.