Project（）Management is the Knowledge Area that employs the processes required to ensure timely and appropriate generation, collection, distribution, storage, retrieval, and ultimate disposition of project information.

A．Integration

B．Time

C．Planning

D．Communication

有一类加密类型常用于数据完整性检验和身份验证，例如计算机系统中的口令就是利用 【17】 算法加密的。