Use Pdfsam to remove Safe Mode from PDF files

When it comes to PDF security, it's also annoying, making it impossible for PDFs to copy content and make no changes. It's annoying at first sight.
It used to be removed using the PDF Password remover, but sometimes it doesn't work, and the software is in D on the Internet, and security is worrying.
An accidental opportunity to discover that Pdfsam can do the same thing, and the steps are simple:
1. Split the PDF file. The safe mode of this file has been removed at this time.
2. If necessary, merge the parts of the division together.
But this trick is not hundred test lark do not know.

Finally, the principle of this method does not know what I do not know. Personal speculation is that this security model needs to be based on full-text content, so long as it destroys any part of it, it can cause this mechanism to fail. Who is eager to know, but also look at the liberal enlighten.

This article is from the "lone light map of the Road" blog, please be sure to keep this source http://solitarycandle.blog.51cto.com/986280/1769970

Use Pdfsam to remove Safe Mode from PDF files