Cryptography is the key to solve these information security problems.
密码技术是解决这些安全问题的关键技术。
Firstly, the information security problems of checkup workflow in PDM are discussed.
笔者首先分析了PD M中审批工作流存在的信息安全问题。
Start from computer information security problems, we introduce the criteria about secure evaluating.
本文首先从计算机信息安全问题出发,介绍了有关的安全评测标准;
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