基于国密算法的轻量级跳变密钥加密系统

A lightweight hopping key encryption system based on domestic cryptographic algorithm

针对传统密钥协商协议计算效率偏低、安全性不足,以及通信全程使用单一会话密钥所带来的安全隐患,提出了一种轻量级的基于任务的数字通信加密系统。该系统综合运用国密算法SM2、SM3和SM4,提供任务授权、身份认证、会话密钥协商、数据传输加密和时间戳保护等安全机制,采用跳变密钥加密会话消息以降低破解风险。性能测试结果表明:该系统可有效防御诸如未授权接入、身份冒充、信道窃听、数据篡改和重放攻击等安全威胁,具有安全性强、计算效率高、资源占用少、实现自组织和完全自主可控等特点。

In view of the low computing efficiency and insufficient security of the traditional key agreement protocol,as well as the security risks caused by using the single session key throughout the whole communication,a lightweight task-based digital communication encryption system was presented.The domestic cryptographic algorithms SM2,SM3 and SM4 were comprehensively used to provide security mechanisms such as task authorization,identity authentication,session key agreement,data transmission encryption and timestamp protection.Meanwhile,the session messages were encrypted with hopping key to reduce the cracking risk.The results show that the system can effectively prevent security threats such as unauthorized access,identity impersonation,channel eavesdropping,data tampering and replay attacks,which is characterized by strong security,high computing efficiency,less resource occupation,self-organization and complete self-control.