It does not matter here if you are talking about an electronic signature an image of your actual signature or a digital signature one that is mathmatically calculated. Both types of signature are used to identify you as the document signatory, but both can be abused if a user can edit document content.
Since Adobe PDF password restrictions can be easily removed i. Users can just edit the PDF and remove all watermarks in a single action. It should also stop users taking screenshots so they cannot easily remove watermarks in a Photo Editing software. To protect your electronic signature or signature image from being copied in a PDF document, you should restrict PDF editing. While a good PDF DRM system will also prevent high quality screenshots being taken by screen grabbing tools, it is important to bear in mind that users can still take photos of anything displayed on the screen with a camera.
Although the quality of a photo may be poor, it is still a good idea to use a background watermark with your signature on top so that it is hard to remove from the background image — some Moire images may be useful for this purpose. See using document watermarks to deter copying. When you digitally sign a PDF document that just proves the document was signed by you.
It can also be used to check if the document has been altered in any way, but it does not stop users editing PDF content or tell you what changes were made. However PDF digital signatures are not as secure as you think — they can be bypassed or used in a manner that allows an attacker to add or change information in a digitally signed PDF document.
Restrict pdf from printing or control the number of prints, expire PDF documents after a period of time or number of views, instantly revoke access, stop copying, sharing and screen grabbing. You can restrict and control access to your PDF files in one simple step. See our DRM technology. Restrict PDF Files. Protect IP. Restrict Use. Set Expiry. Revoke Access. You only have to protect a document once in order to customize it for multiple users.
Log Use. Comply Law. Comply with legislation by controlling access and use: Ensure only authorized parties can view confidential documents Enforce document retention policies with automatic expiry Log use for proof of when documents are viewed and printed. We would recommend Locklizard to other companies. Make the PDF expire on a specific date, after a number of views, after a number of prints, or after a number of days from opening.
Stop screen grabbing even from remote connections applications. Log PDF views and prints to see if your documents are being misused. So the ability to restrict PDF use has become increasingly important over time. PDF restrictions — what do they do? Restrict PDF access Preventing people from accessing a PDF document when they are not authorized to do so is achieved using encryption.
Restrict PDF printing The easiest way to restrict PDF printing is by controlling the ability of users to make printed copies which could be scanned or photocopied. In conclusion, there are many reasons why you would need to restrict PDF access and use, but you need to make sure you use a PDF security program that: provides effective controls enforces those controls regardless of where PDFs are located prevents controls being easily removed by third party applications.
Do PDF certificates prevent restrictions being removed? How to restrict editing PDF without password?
How to restrict PDF book from sharing? How do I stop a signed PDF from being printed or copied? Viewed 11k times. Looking for solution for PDF type files.
Improve this question. John Zachariah 1, 1 1 gold badge 11 11 silver badges 29 29 bronze badges. Ramesh Ramesh 1 1 gold badge 3 3 silver badges 16 16 bronze badges. As you have not received an answer that works for you, have a look at a 3rd party solution such as blog. It is not just watermarking, it can also apply security settings Disclaimer, I worked on this so consider me biased, but very knowledgeable on this topic.
Add a comment. Active Oldest Votes. Improve this answer. Community Bot 1. John Zachariah John Zachariah 1, 1 1 gold badge 11 11 silver badges 29 29 bronze badges. Is there any other workaround? Checking the same — John Zachariah. Sign up or log in Sign up using Google. In my business, the need for the PDF to not be downloaded is due to not wanting customers to be able to easily share downloaded materials with other people.
I make worksheets, and if they are easy to share, the customer is more likely to email them to a friend. If sharing them is made more complicated, they are less likely to want to go to the trouble. Not being able to download them without having advanced computer knowledge is good enough for me. Hope this sheds light on a need in the industry. Things like being able to get a screen shot, etc. Hope this helps. I i — Janet Giel-Romo. Add a comment. Active Oldest Votes. Improve this answer.
Legionar 7, 2 2 gold badges 36 36 silver badges 66 66 bronze badges. Browsers' developer tools make it trivial to get at anything sent to the user, and you're not going to stop screen capture programs.
Heck, the user could use their mobile phone to take pictures of the computer screen… — Donal Fellows. Right-click, view page source, get link of image under the transparent image. It's been in Firefox for as long as I can remember. I think I remember it existing in Mozilla Suite back before it got pared down into Firebird, which then became Firefox. I consider that under 'one of the ways of getting at it that requires digging into the source.
I say you can lock it down 'hard' but not 'make it secure. Ultimately you will need to: Create Images for each page Present those to the user on the web via your own interface html, flash etc Keep in mind flash wont work on Apple devices if that's required.
Claudio Nastasi Junior 9 9 bronze badges. Mark Redman Mark Redman 23k 19 19 gold badges 88 88 silver badges bronze badges. I believe Chrome has currently removed support for all plugins but Flash and applied a whitelist for which sites are allowed to run Flash I can download this file - it give download and also print options like normal pdf — obaid.
Jonathan Thurft Jonathan Thurft 3, 7 7 gold badges 43 43 silver badges 73 73 bronze badges. If you encrypt the PDF you can control how printable and changeable it is. You haven't mentioned what you're using to build the PDFs so the details are up to you. You might be able to do the same thing with layers Optional Content Groups as well, not sure. Mark Storer Mark Storer These permissions are ignored by browser-based PDF viewers. Always happy to point out the obvious :. Captian Obvious Captian Obvious 21 1 1 bronze badge.
For anyone else like-minded who wanders in off Google, the reason no such solution exists is because, if you have the knowledge to implement it, you also have the knowledge to see less obvious reasons it'll never work. It all traces back to the fundamental problem that, at the theoretical level, crypto is about preventing C from intercepting communication from A to B and it devolves to "security by obscurity" if B and C are the same person and it's well-known that "security by obscurity" is just giving yourself a false sense of security.
In my opinion the other proposed solution is. Shahroze Nawaz Shahroze Nawaz 5 5 silver badges 9 9 bronze badges. Convert pdf to image. Use image tag to display the image. Disable right click on the image. Foiled again, Batman. Very little information given, e. Regardless, this method is not a guaranteed solution for preventing download of a PDF. ThiagoSilva It's even simpler than that. Firefox is designed around the recognition that it's running on the end-user's computer, not the website developer's.
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