提出了一种基于中国余数定理的等级访问控制组密钥管理方案.服务器能根据每个组对应的所有下级组密钥信息和因子素信息,利用中国余数定理计算得出一个公共信息X.服务器为不同安全等级的组构造等级关系矩阵,使上级组成员能根据公共信息X和等级关系矩阵,仅进行哈希运算、除法运算和一次求模运算即可推导得出所有下级组密钥.仿真结果表明方案有很好的安全性,计算方便快捷,密钥生成效率高,计算量小,适合物联网、传感器网络等用户计算能力受限的环境. A hierarchical access control group key management scheme based on the Chinese remainder theorem is proposed.The server can compute a public information by using the Chinese remainder theorem according to all subordinate group key information and factor information of each group X. Server For each group with different security levels, a hierarchical relation matrix is ​​constructed, so that all the upper-level group members can deduce all lower-level group keys according to public information X and rank relation matrix, only performing a hash operation, a division operation and a modulo operation. The results show that the scheme has good security, convenient and quick calculation, high efficiency of key generation and small computation load. It is suitable for the environments where the computing power of users such as IOT and sensor network is limited.