本视频属于openHPI课程Internet Security for Beginners。你想看更多吗？
An error occurred while loading the video player, or it takes a long time to initialize. You can try clearing your browser cache. Please try again later and contact the helpdesk if the problem persists.
转换到当前位置
需要使用字幕时，请在视频播放器设置中选择一种语言。