Based on digital envelop technology,it presents three types of file encryption modes,they are: single transfer,multiple transfer and anti-denial. The modes are used to solve the problems in the file transfer such as one-to-multiple transfer,behavior denial.
基于数字信封等安全技术,提出了单播、多播和抗抵赖3种文件加密模式,用于解决文件传输中经常面临的一对多传输和行为抵赖问题,上层应用可根据网络环境和安全需求灵活选用相应的加密模式。
参考来源 - 网络环境文件端到端加密传输方案设计·2,447,543篇论文数据，部分数据来源于NoteExpress
Although they can handle multiple screens, they do not do well with applications that start out in one place and then move to another.
虽然它们可以处理多屏幕，它们不能很好地处理那些在一个地方开始，然后移动到另一个地方的应用程序。
To go from one robot to multiple robots, you need all three of those ideas.
从一个机器人发展到多重机器人，你需要所有那三个构想。
One role might be granted to multiple groups or users (principals); one group or principal may have multiple roles mapped to it.
可以将一个角色授予多个组或用户(主体)；一个组或主体可以具有映射到它的多个角色。
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