现有铁路安全通信协议RSSP(Railway Signal Safety Protocol),对保障铁路安全通信具有非常重要的作用,但是因攻击者的攻击而存在安全隐患,对铁路的安全通信造成威胁.基于混沌信号的独有特性,提出一种保障铁路安全通信的混沌加密方法.结合混沌掩盖技术,把传送信号经过加密函数混合到混沌信号中,经过混合的信号类似杂波信号,达到不易被破解与攻击的目的.利用分数阶超混沌系统的同步信号对混合信号通过解密函数去掩盖,大致经过6.2s把铁路通信需要传送的信息从混合信息中恢复出来,实现了铁路的安全通信.数值仿真和理论分析结果的一致性表明了该方案的有效性.%The railway safety communication protocol RSSP has a important role in the protection of railway safety communication.However,there are security risks due to attackers' attack,which poses a threat to the safety communication of the railway.A new chaotic encryption method to protect railway safety communication based on the unique characteristics of chaotic signals is presented.The transmitted signals were modulated to the chaotic signal with chaotic masking.In this way,the mixed signal was similar to the clutter signal,so the protected information would not be easy to crack and attack.Finally using synchronization of fractional order hyperchaotic system,the useful signals of railway communication were recovered from the mixed information for 6.2 seconds.The security and effective transmission of the information was realized,and the security and reliability of the railway communication was ensured.The consistency of the results of numerical simulation and theoretical analysis demonstrates the effectiveness of the proposed scheme.
展开▼
