需求分析的任务还不是确定系统怎样完成它的工作,而仅仅是确定系统必须完成哪些工作,也就是对目标系统提出完整,准确,清晰,具体的要求-Mission needs analysis of how the system is not yet completed its work, but simply to identify what kind of work must be completed, but also on the target system is complete, accurate,

针对基于IBC的无线Ad hoc网络中的密钥管理存在的安全威胁，本文在分析所有节点均可以移动的无线网络组通信安全需求的基础上提出了分层的分布式组密钥管理框架。-For the IBC-based wireless Ad hoc network security threats exist in key management, this paper analysis of all nodes can be mobile wireless network group communication ba

针对DTCP内容保护协议，本文通过分析协议使用的密码算法，提出安全散列函数SHA一1、SHA一256，AES高级加密算法，素数域椭圆曲线点乘算法的硬件实现方法，有效地满足了DTCP内容保护协议对设备验证、传输数据加密的需求。-Aimed at DTCP content protection agreement, the paper analyzes agreement using cryptographic algorithms, puts forward secure hash functio