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- 银川新闻网--第五届宁夏网络安全知识技能竞赛题库:2021-8-27 · 175. 数据安全包含可用性、完整性、保密性三个基本特性。 176. 公司对电脑密码的强壮度要求是: 字母加数字组合8位以上。 177. 员工离开自己的计算机时要立即设置锁屏。 178. 信息安全五大要素是: 保密性、真实性、完整性、可用性、不可
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