Reduced hierarchy and transparency are both key principles of open source project management.
减少层级结构和增加透明度是开源式项目管理的两个重要因素。
The logical key hierarchy (LKH) scheme is the most efficient protocol for key management in the field of multicast at present.
逻辑密钥层次（LKH）方案是目前多播领域中最有效的密钥管理协议。
With the application of symmetric cipher and asymmetric cipher, a cryptographic key management scheme for hierarchy is presented and a workgroup cryptographic key management scheme is presented.
结合单钥加密和双钥加密的理论，分别给出了纵向的等级安全管理密钥管理方法和横向的协同工作安全管理的工作组密钥管理方法。
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