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| 软键盘局限性：如果黑客进行穷举以得到所有的软键盘形式，然后根据用户操作细节进行暴力破解得到口令。屏幕截图方式的木马 | ||
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| 动态软键盘：随着用户鼠标动作细节而改变键盘局部布局的键盘。对于每个软键盘接口单元，定义其周围3~9个接口单元与其邻居组成1个域，当用户单击某一个接口单元时，该接口单元与其整个域进行动态变换，从而实现软键盘的局部动态变换。当用户键入口令之后，无论登录成功与否，服务器端均销毁登录池中用户的临时信息，口令将在静默状态下转化为密文填入口令栏，黑客获取得到只能是密文【此为网上一论文的设计方案】 |
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【此为网上一论文的设计方案】？大大方方的给出规范的引文标注，科学研究的过程就是站在前人的肩膀上继续向上攀登的。
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| 3. 信息来源 | ||
| - [https://www.techsupportalert.com/improving-public-terminal-security.htm](https://www.techsupportalert.com/improving-public-terminal-security.htm) |
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对于超链接的处理，请学会使用以下方式：
[How to Improve Your Security When Using a Public Terminal | Submitted by gizmo.richards | Last update on 4th August, 2012 - 7:04am](https://www.techsupportalert.com/improving-public-terminal-security.htm)是不是兼顾了阅读便利性和点击跳转的交互便利性？
2017-2/hkl_lr/校内一卡通.md
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你需要把对屏幕键盘的调研进一步聚焦到使用Javascript技术开发出来的屏幕键盘是如何实现的？
你已经掌握了屏幕键盘的英文关键词on screen keyboard，现在我又告诉你了一个新的关键词javascript，那么组合起来，你Google一下，应该不难找到以下几个项目：
- https://github.com/chriscook/on-screen-keyboard
- https://mottie.github.io/Keyboard/
- https://github.com/HeliosInteractive/JS-OnScreen-Keyboard
结合你已经调研到的一些知识，那么学校的一卡通网站使用的OSK能防御哪几种威胁？具体如何实现的防御？已有的这些开源OSK，它们能防御哪几种威胁？具体如何实现的防御？不同的OSK之间是否有可以对比学习和迁移学习之处呢？
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今年所有人的作业都不再合并到作业仓库，每次作业批改完毕后，我会统一关闭每个PR，助教会记录大家的评分。同时，避免其他人在发送PR前还需要先更新作业仓库里的新提交文件，减少下载时间，提高提交PR的效率。 |
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