保护 PDF 和嵌入视频的安全
我的公司以流媒体视频（托管在 CloudFront 上）和 pdf（托管在 Amazon S3 上）形式为我们销售的产品提供编程说明。我们不希望我们的客户能够从这些 PDF 中取出内容、保存 PDF 或能够共享链接。同时，我们不希望人们能够播放视频（我们不太关心视频）。
我一直在绞尽脑汁试图找出确保这一点的最佳选择。 PDF 安全性有哪些限制，您能阻止它们吗？或者至少让它变得非常困难？
My company delivers programming instructions for products we sell in both streaming video (hosted on CloudFront) and pdfs (hosted on Amazon S3). We don't want for our customers to be able to take the content out of these PDFs, save the PDF, or be able to share the link. At the same time, we don't want for people to be able to streal the video (we're less concerned with the videos).
I've been racking my brain trying to figure out the best options on securing this. What are the limitations with PDF security, at the end of the day, can you stop them? Or at least make it really hard?
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除非您以自定义格式创建和交付数据，您自己的查看器具有内置内容保护机制，否则您就不走运了。您交付给客户的所有内容都可以被捕获、复制和分发。对于 PDF 和视频流来说，这是微不足道的。
Unless you create and deliver your data in custom format, your own viewer with built-in content protection mechanisms, you are out of luck. Everything you deliver to the client can be captured, copied and distributed. With PDFs and video streams this is trivial.
如果您可以忍受 PDF 生成开销，您可以通过在每个页面上放置客户的姓名来个性化 PDF。也关闭编辑，这会让人们泄气。当然，仍然有可能绕过这些。
If you can suffer the PDF generation overhead, you could individualize the PDFs by putting the customer's name on each page. Turn off editing as well, and that'll discourage people. It'll still be quite possible to get around these, of course.