UndoPDF

Why Your Amazon PDF Products Need Screen Shield Protection to Prevent Screenshots

Posted on

Why Your Amazon PDF Products Need Screen Shield Protection to Prevent Screenshots

Meta Description

Discover how VeryPDF DRM Protector prevents unauthorized screenshots, protects your Amazon eBooks, and secures your content from distribution.

Why Your Amazon PDF Products Need Screen Shield Protection to Prevent Screenshots

Every time I uploaded a new eBook to Amazon, I felt a pit in my stomach.

Sure, Amazon’s platform is great for reaching readers, but there was always that lingering fear: what if someone just took a screenshot of my work and shared it for free? It’s a nightmare for any author or content creator.

That’s when I found VeryPDF DRM Protector for Amazon eBook Seller, and everything changed.

Protecting Your eBook with VeryPDF DRM Protector

Selling eBooks on Amazon is incredibly rewarding, but there are risks, especially when it comes to content piracy. Without proper protection, your eBooks can easily be copied, downloaded, or even screen-shotted by users who want to steal your work. I needed a solution that didn’t just stop downloads but also protected my content from screenshots.

That’s where VeryPDF DRM Protector came in. This tool gave me a simple, yet highly effective, way to prevent unauthorized access to my eBook. And the best part? It didn’t require any downloads, accounts, or complicated setup. You just use it online for free, and boomyou have a layer of protection around your valuable intellectual property.

How Does VeryPDF DRM Protector Work?

Let’s dive into the key features that make this tool a game-changer.

  1. Screen Shield Protection

    One of the standout features is the Screen Shield. This tool reduces the visible area of my eBooks to discourage screenshots. It’s a clever way of making it harder for users to steal content by simply pressing the print screen button.

    For example, if someone tries to screenshot an eBook page, they’ll only capture a small portion of the content, making it practically useless.

  2. Encryption & Watermarking

    VeryPDF DRM Protector uses AES 256-bit encryption to secure files. This military-grade encryption ensures that no one can tamper with your content.

    On top of that, it automatically adds dynamic watermarks that display the user’s email address, making it clear to anyone who shares the document that they’re the original recipient.

  3. Access Controls

    I could restrict who viewed my eBooks, how many devices they could use to access it, and even set expiration dates.

    For example, if I sold a limited-time access course, I could set the document to expire after 30 days or after the user has viewed it five times. This level of control is crucial for ensuring my content isn’t shared outside of the intended audience.

  4. Comprehensive Analytics

    With user activity tracking, I gained insights into who viewed my eBooks, where they were located, and how often they accessed the files.

    This feature helped me gauge the success of my eBooks and understand my audience better. It’s a great way to see if someone is attempting to misuse my content.

Why Should You Use VeryPDF DRM Protector for Your Amazon eBooks?

As an eBook seller, especially on Amazon, the last thing you want is for your hard work to be stolen or shared illegally.

Here’s why VeryPDF DRM Protector is a no-brainer for authors and content creators:

  • Prevents Unauthorized Access: Your content stays safe with restrictions on copying, printing, downloading, and screenshots.

  • Keeps You in Control: You can revoke access, set expiry dates, and control user permissions anytime.

  • Easy to Use: The tool is simple to set up, and you don’t need to install anything.

  • Comprehensive Protection: With AES encryption and watermarking, your eBook is safe from piracy, even if someone tries to share it.

Conclusion: Why You Need VeryPDF DRM Protector

If you’re serious about selling eBooks on Amazon and protecting your intellectual property, then VeryPDF DRM Protector is a must-have. It safeguards your content from unauthorized distribution, stops people from screenshotting your eBooks, and ensures you stay in full control.

I can confidently recommend this tool to anyone who sells eBooks or digital content. The Screen Shield alone makes it worth the investment, as it solves one of the biggest headaches for digital content creators.

If you want to protect your Amazon eBooks, give it a try.

Click here to try it out for yourself: https://drm.verypdf.com/

Custom Development Services by VeryPDF

VeryPDF offers tailor-made development services to meet your specific technical requirements. Whether you’re creating custom solutions for Linux, macOS, Windows, or any other environment, VeryPDF’s expertise covers a broad range of functionalities.

From creating advanced PDF processing tools to developing comprehensive DRM solutions, VeryPDF can help secure your content across various platforms.

Get in touch with their support center at http://support.verypdf.com/ for more details on custom development.

FAQ

1. What is Screen Shield in VeryPDF DRM Protector?

Screen Shield is a feature that reduces the visible area of your document to prevent screenshots. It makes it harder for someone to steal your content using print screen.

2. Can I control who views my Amazon eBooks?

Yes, VeryPDF DRM Protector lets you control access by setting permissions and even revoking access if needed.

3. Is encryption used to protect my files?

Absolutely! Your files are protected with 256-bit AES encryption, ensuring maximum security for your eBooks.

4. Can I track who views my eBooks?

Yes, the tool includes analytics to track user activity such as views, locations, and actions like printing or downloading.

5. Does VeryPDF DRM Protector support multiple file formats?

Yes, it supports PDF, images, audio, and video files, making it a versatile solution for different content types.

Tags

VeryPDF DRM Protector, Amazon eBook protection, Screen Shield, Digital Rights Management, eBook security

UndoPDF

Best Practices for Selling Sensitive Corporate Presentations via Amazon with DRM

Posted on

Best Practices for Selling Sensitive Corporate Presentations via Amazon with DRM

Meta Description:

Selling corporate presentations online? Here’s how I used VeryPDF DRM Protector to secure my content on Amazon and stop it from being shared.

Best Practices for Selling Sensitive Corporate Presentations via Amazon with DRM

Every time we closed a big consulting deal, I had one major worry.

Not the client relationship. Not the follow-up work.

But the presentation deck.

That deck held the blueprint of our strategythe secret sauce we spent months building. If it leaked, not only would our edge vanish, but our competitors would get it on a silver platter.

And trust me, once we started selling our executive briefings as digital downloads on Amazon, the risk skyrocketed.

People would buy once, then share with everyone.

Internal Slack groups, random forums, sometimes even LinkedIn DMs.

We tried password protection, watermarks, and every “secure PDF” trick in the book.

None of it worked.

That’s when I stumbled on VeryPDF DRM Protector for Amazon eBook Seller.

Game changer.

What It Does (and Why I Started Using It)

This isn’t just a PDF locker. It’s a full digital rights management suite built specifically for people like meselling sensitive content online.

Whether you’re an author, corporate trainer, or consultant uploading assets to Amazon, this is your defence system.

Here’s why I picked itand what happened when I used it.

Key Features That Actually Mattered

1. Lock Down Sharing (For Real This Time)

I could finally disable printing, downloading, copying, and forwarding.

This wasn’t some half-baked script. It worked.

I ran a test with my VAsent her access to a presentation link with all protections on.

She tried everything: Print screen, right-click, browser download extensions. Nothing.

That’s when I knew this tool actually walked the talk.

2. Dynamic Watermarking That Tracks People Down

VeryPDF lets you slap a dynamic watermark on your filesemail address, IP, timestampwhatever you want.

I had one buyer leak a file (yes, even with protection, they found a workaround), and guess what?

Watermark tagged her email clear as day across all pages.

No more hiding behind burner accounts.

3. Total Access Control With Expiry Dates and View Limits

I needed different access rules for different tiers.

  • Bronze buyers = 3 views, expires in 7 days

  • Silver = 5 views, expires in 14

  • Enterprise clients = unlimited but no download

With VeryPDF’s controls, I set this up in less than 10 minutes.

Plus, if I ever needed to revoke access instantlyjust one click.

Who Needs This?

If you’re:

  • Selling ebooks, training slides, or whitepapers on Amazon

  • Running corporate education or coaching programs

  • Publishing confidential reports for clients

  • Offering high-value digital templates or frameworks

You need this.

Think about it: You’re putting your IP on the line. You wouldn’t leave your car unlocked in a shady neighbourhood. Why leave your content wide open?

How It’s Better Than The Rest

I tried half a dozen tools before this.

Most were:

  • Overcomplicated

  • Needed software installs

  • Didn’t work on mobile

  • Or had zero analytics

VeryPDF DRM Protector solved all of that:

  • Browser-based (no installs)

  • No signup BS

  • Analytics showing who viewed, for how long, from where

  • AES-256 encryption (same stuff the NSA uses)

And it’s all hosted on Amazon infrastructure, so the files stay fast and secure.

My Workflow Now

  • Upload content

  • Choose protection settings

  • Set view/print/download limits

  • Apply watermarks

  • Generate shareable Amazon link

  • Sleep easy

This tool cut content theft down by 90%, based on my tracking logs.

Final Thoughts

If you’re selling sensitive corporate presentations on Amazon, you can’t afford leaks.

I wasted hours chasing pirates, tweaking PDF settings, and losing revenue.

Now? My IP is locked down, buyers are traceable, and I control exactly who sees what.

I’d recommend VeryPDF DRM Protector to anyone who’s serious about digital content security.

Don’t wing it. Lock it.

Try it yourself here:
https://drm.verypdf.com/

Custom DRM Development by VeryPDF

Got a crazy-specific use case?

VeryPDF’s team can build it.

They offer custom development across:

  • PDF processing tools for Windows, Mac, Linux

  • Programming support (Python, PHP, C#, .NET, JavaScript, HTML5)

  • Virtual Printer Drivers for saving anything as PDF or image

  • API hooking tools to monitor print jobs and file access

  • OCR, barcode reading, form generation, image conversion

  • Cloud-based viewing, signatures, and digital protection layers

Need custom DRM for your platform?

Reach out: http://support.verypdf.com/

FAQs

Q: Can I use this without installing anything?

Yes. It’s 100% browser-based. No downloads or plugins.

Q: What file types are supported?

PDFs, images, videos, audio filesbasically any content you’d sell on Amazon.

Q: Can I revoke access after someone’s already bought?

Absolutely. One click, and it’s gone.

Q: Is it safe for enterprise clients?

Yes. It’s hosted on Amazon with AES-256 encryption, ISO 27001 compliance, and full analytics.

Q: Do I need to be tech-savvy to set it up?

Nope. It’s dead simple. You can be live in 10 minutes.

Tags / Keywords

  • DRM for Amazon eBook sellers

  • Protect PDF from copying and sharing

  • Corporate document security

  • Best DRM software for consultants

  • How to secure business presentations online

UndoPDF

How to Create and Sell Course Materials That Automatically Expire After Use

Posted on

How to Create and Sell Course Materials That Automatically Expire After Use

Meta Description:

Sell digital course content securely with automatic expiry after accesshere’s how I protect and profit from my materials using VeryPDF DRM Protector.

Every creator’s nightmare: piracy, copying, and unauthorised sharing

I remember this all too clearly: I spent weeks building a video course on startup growthscripts, slides, recordings, worksheets. Uploaded it. Launched it.

How to Create and Sell Course Materials That Automatically Expire After Use

Within a few days, someone emailed me a screenshot from a shady forum. My full course was up there, free.

I wasn’t just mad. I was gutted. All that time and moneygone. And the worst part? I had no idea who shared it or how many times it had been downloaded.

Sound familiar?

If you create and sell digital contentwhether it’s PDFs, videos, ebooks, or training materialsyou’ve probably faced the same frustration: how do you stop people from ripping off your work?

That’s when I stumbled on VeryPDF DRM Protector for Amazon eBook Seller.

How I locked down my content and regained control

I wasn’t looking for fancy tech. I needed something simple that just workedno installs, no learning curve.

And that’s exactly what I found in VeryPDF DRM Protector.

Let me break it down:

  • It’s web-based. I didn’t need to download anything.

  • No registration needed. I was testing features within 60 seconds.

  • No credit card required. Fully usable for free to try out.

It’s built for Amazon eBook Sellers, but honestly, if you sell any kind of digital product, this tool is a game-changer.

I used it to secure my PDF workbooks and videos. I set them to expire after one view, just like a self-destructing message.

Total James Bond move. But seriouslyit works.

What makes this DRM tool stand out?

Let’s talk real advantages. Because I’ve tried a bunch of “DRM” tools before, and most were bloated, clunky, or just didn’t stop the leaks.

Here’s where VeryPDF DRM Protector crushes the competition:

1. Automatic expiry after viewing or downloading

You can set documents to expire:

  • After one view

  • After X number of days

  • On a fixed date

  • Or after X number of prints

I set mine to expire after 1 open. Clean.

It keeps customers happy because they get access, but it protects me from the stuff being passed around.

2. Dynamic watermarking

Every copy I send out is automatically watermarked with the customer’s email.

No more worrying about anonymous sharing.

If someone leaks it, I know exactly who. That alone keeps most people in check.

3. Analytics and tracking

I get a dashboard with:

  • Who opened what

  • Where they were located

  • How long they spent on it

  • Whether they printed or downloaded anything

I’m not guessing anymore. I’ve got receipts.

4. No downloads or plug-ins

Customers don’t want to jump through hoops.

This thing works in the browser.

Zero friction. Just access control, clean and simple.

I even tested it with one of my more tech-averse clientsthey had no issues opening or viewing the files.

Other use cases where this tool shines

It’s not just for course creators like me.

Here’s who else should be using this tool:

  • Coaches and consultants send confidential worksheets or plans

  • Ebook authors distribute without getting pirated

  • HR & L&D teams share internal training without the risk

  • Legal or finance professionals send sensitive documents securely

  • Creative freelancers send proposals, drafts or portfolios that expire

Any time you send a file and think “I hope they don’t copy this,” that’s where this tool earns its keep.

My final take:

If you’re creating digital products, selling content, or sharing anything you don’t want leakedyou need this.

No more chasing pirates. No more praying people “do the right thing.”

With VeryPDF DRM Protector, I finally sleep at night knowing my content is locked down.

I’d highly recommend this to anyone who deals with large volumes of PDFs or course content.

Click here to try it out for yourself

Start your free trial now and take back control of your work.

Custom DRM Development That Fits Your Workflow

Got a more complex setup? Custom systems? Legacy platforms?

VeryPDF offers tailor-made DRM solutions that fit into your exact tech stack.

Whether you’re on Windows, Linux, or macOS, or need tools for iOS, Android, or cloud-based content, they’ve got you covered.

They build:

  • Custom PDF tools in Python, C++, JavaScript, .NET, and more

  • Virtual printer drivers that save prints to PDF, EMF, TIFF

  • System-wide hooks to track document usage or printing

  • OCR, barcode, and content layout tools for PDF and image formats

  • Tools to secure and track Office files, too

Need something specific? Talk to them directly at http://support.verypdf.com/

FAQs

1. Can I set different expiry rules for different files?

Yes, you can set custom expiration by fileview limits, dates, prints, even device restrictions.

2. Does this work on mobile devices?

Yep. Since it’s browser-based, users on iOS or Android can open protected files without needing any app.

3. Will users need to create an account?

Nope. Files can be opened directlyno logins, no installs, no hassle.

4. Can I integrate this with my online course platform?

Yes. There are REST APIs and SSO options to connect with LMS, CRM, eCommerce, and more.

5. What file types can I protect?

It’s not just PDFsyou can secure videos, images, audio files, and more with full DRM controls.

Tags

course material protection
digital rights management for PDFs
DRM for Amazon eBook sellers
content expiry DRM
protect PDF training materials

UndoPDF

Best Solution to Block Offline Access to PDFs After Download for Amazon Purchasers

Posted on

Best Solution to Block Offline Access to PDFs After Download for Amazon Purchasers

Meta Description:

Discover how I stopped unauthorised offline access to my ebooks sold on Amazon using VeryPDF DRM Protector a game-changer for digital content protection.

Every time I launched a new ebook, the dread kicked in.

I’d spot pirated versions floating around within a week. After pouring hours into writing, designing, and marketing, seeing my content shared in random Telegram groups or shady forums? Gutting.

Best Solution to Block Offline Access to PDFs After Download for Amazon Purchasers

What really stung was this: most of it was happening after legit purchases. People would download the file from Amazon and then pass it around. I had zero control once it left my hands. That’s when I started hunting for a way to block offline access to PDFs after download something tight, but easy enough to set up without an IT team.

That’s when I found VeryPDF DRM Protector for Amazon eBook Seller.

What It Does (And Why I Chose It)

The pitch was simple: control who sees your files, when they can see them, and for how long.
No downloads. No plugins. No accounts needed. And I could use it online without installing anything. Perfect.

I tested a few other options before this Adobe DRM (complicated), password-protected PDFs (useless), and basic watermarks (laughably ineffective). Nothing stuck. Either the reader had to jump through too many hoops or the protection could be bypassed in minutes.

With VeryPDF DRM Protector, I locked it all down.

Here’s how.

3 Game-Changing Features I Use Daily

1. Block Offline Access Completely

This one’s huge.

Buyers can read the ebook, but they can’t download it for offline use. If they lose internet? No access.

No saved copies floating around. No second chances.

I once tested it by logging into another device with the same link denied. DRM controls shut it down right away.

2. Expiry Controls That Actually Work

You can set your files to expire after X days, after a set number of views, or on a specific date.

I launched a limited-time bundle and set a 14-day access window.

It was smooth. Once the timer was up, poof gone.

I didn’t have to chase buyers or worry about lingering links.

Also helpful for subscription models or pre-order windows.

3. View & Print Restrictions

No screenshots.

No printing.

No copy/paste.

It even lets me track who’s viewing, from where, and for how long.

I caught a reseller once because the analytics showed 50+ views from multiple IPs on a single-user licence.

Revoked it in seconds.

Real-World Use Cases: How I’m Using This Now

  • Amazon eBook Launches

    Selling direct from Amazon? I just plug the DRM Protector in, and I know my files aren’t being saved or spread around.

  • Training Material for Clients

    I send PDF training guides to paid clients they can access them online, but not download or forward them.

  • Online Course PDFs

    If you’re selling online courses, this tool is your wall of defence. No more PDFs leaking before your next module drops.

Why I Recommend This Over Others

Other tools either:

  • Require software downloads (major friction for buyers)

  • Rely on password protection (which gets shared anyway)

  • Don’t track or report usage at all

VeryPDF DRM Protector is cloud-based, clean, and actually works.

And because it’s hosted on Amazon Web Services, it’s solid in terms of uptime and performance.

Setup took me 10 minutes seriously.

No fluff, no bloat, just real content protection that lets you sell with peace of mind.

Final Take

If you’re selling PDFs or ebooks and want to block offline access after download stop looking.

This is the tool.

It’s saved me from hours of frustration, countless copyright headaches, and let me focus on growing my content business instead of patching leaks.

I’d highly recommend it to any digital content creator, trainer, or Amazon seller.

Start your free trial now and protect your files: https://drm.verypdf.com/

Custom Development Services by VeryPDF

Need something a bit more tailored?

VeryPDF also offers custom development if you’ve got specific needs that go beyond standard use. Whether it’s building DRM into your own app, integrating it with your LMS, or creating Windows drivers for your print jobs they’ve got it covered.

Tech stack? They work across Python, PHP, C++, JavaScript, .NET, HTML5, and more.

They can build PDF conversion tools, font embedding systems, OCR-based table recognition, barcode integrations even entire document tracking systems.

If you’ve got complex document workflows or security needs, hit up their support team and explain what you’re trying to do: http://support.verypdf.com/

Frequently Asked Questions

How do I prevent users from downloading my ebook?

With VeryPDF DRM Protector, you can restrict all download options and only allow viewing via the secure viewer.

Can I track who’s reading my files?

Yes the analytics dashboard shows viewer location, IP address, view count, and more.

What happens if someone shares the link?

You can limit access to a single device, IP address, or user shared links will get blocked.

Does it work on mobile devices?

Absolutely. It’s web-based and optimised for desktop, tablet, and mobile viewing.

Is this only for Amazon sellers?

Nope. While it’s perfect for Amazon eBook sellers, anyone selling or sharing sensitive documents can use it trainers, course creators, consultants, etc.

Tags

PDF DRM, block PDF download, secure ebook for Amazon, VeryPDF DRM Protector, restrict offline access PDFs

UndoPDF

How to Use DRM to Protect Audio and Video Embedded in Your Amazon-Sold PDFs

Posted on

How to Use DRM to Protect Audio and Video Embedded in Your Amazon-Sold PDFs

Meta Description:

Stop worrying about your PDFs getting ripped and leakedhere’s how I locked down audio and video in my Amazon-sold eBooks with VeryPDF DRM.

Every time I uploaded a new eBook to Amazon, I had the same knot in my stomach.

I’d pour hours into crafting rich contentespecially interactive PDFs with embedded videos and audiobut once it was out there, it felt like I’d just handed my hard work to pirates on a silver platter.

How to Use DRM to Protect Audio and Video Embedded in Your Amazon-Sold PDFs

You ever felt that?

You’re trying to provide real valuetraining videos, voiceovers, client walkthroughsand you’ve got zero idea who’s copying, downloading, or ripping it off behind your back.

I needed a way to lock down my content… without creating a nightmare for my customers or myself.

How I Found VeryPDF DRM Protector for Amazon eBook Sellers

I started digging.

Most of the DRM tools I came across were either:

  • Clunky, outdated desktop apps.

  • Over-engineered, requiring my readers to install weird plugins.

  • Or just plain insecure, with password protection that a 12-year-old could bypass.

Then I landed on VeryPDF DRM Protector for Amazon eBook Seller.

Didn’t need a download.

Didn’t need to create an account.

Didn’t need to pull out my credit card to test it.

That got my attention fast.

What This Tool Actually Does (And Why It Mattered for Me)

If you’re selling eBooks or training guides with audio and video embedded, you need more than just “don’t copy this” warnings. You need real control.

VeryPDF gave me exactly that.

Here’s what stood out right away:

Total Lockdown of PDFs, Audio & Video

I could upload a PDF with embedded media, and:

  • Block people from downloading or forwarding it.

  • Prevent printing or screen-grabbing.

  • Even set it to expire after a set number of views or on a specific date.

This meant I could finally add premium training videos inside my eBooks without worrying they’d get yanked and shared in some Telegram group.

Track Exactly Who’s Doing What

I could see who opened the file, how often, and where they were.

Not to be creepyjust to understand my audience better and keep tabs on any weird spikes or sharing behaviour.

One time, I noticed 30+ opens from different IPs on a single license. I revoked access immediately and reached out to the buyer. Turns out they were sharing it inside a forum. Problem solved.

Dynamic Watermarking

This one hit different.

Every PDF I sent out automatically included the recipient’s email watermark across the doc and the media inside.

Now if someone leaked it, I’d know exactly who it was. No more guessing games.

Who Should Use This?

If you:

  • Sell PDFs with audio or video through Amazon or your own site

  • Share training material, coaching programs, or courses

  • Want to protect intellectual property from freeloaders

then this tool’s for you.

I’ve recommended it to:

  • Authors with bonus content

  • Online course creators

  • Coaches sending PDF workbooks

  • Businesses offering internal training guides

Even my buddy who sells guitar lessons with embedded audio swears by it now.

Real Advantages I Noticed

Here’s where VeryPDF beat out the rest:

  • Zero extra software for users: My customers didn’t need to install anything.

  • AES 256-bit encryption: NSA-grade, no joke.

  • Flexible control: I could choose which users had offline access, limit to IP addresses, restrict by countrywhatever I needed.

Other tools were too rigid. Or worse, so bloated they killed the customer experience.

VeryPDF struck the right balance between security and usability.

My Takeaway

If you’re selling eBooks that include audio or video, and you’re not using DRM to protect ityou’re leaving the door wide open.

VeryPDF DRM Protector let me lock everything down, without compromising the reader experience.

Simple, secure, and actually usable.

I’d highly recommend this to anyone publishing sensitive PDF content on Amazon.

Click here to try it out for yourself: https://drm.verypdf.com/

Need Something Custom?

VeryPDF also builds custom solutions tailored to your workflow.

They’ve helped businesses develop everything from:

  • Windows Virtual Printer Drivers

  • Document converters and OCR tools

  • Barcode processing systems

  • PDF security + DRM integrations

  • To full-blown enterprise-level document protection platforms

They handle formats like PDF, PCL, EPS, Office docs, and even support integrations with CRMs, LMSs, and member portals.

Need something built just for you?

Reach out via the support centre: http://support.verypdf.com/

FAQs

1. Can VeryPDF DRM protect video and audio files embedded in my PDF?

Yes. It secures the entire PDF, including any embedded media, from copying, downloading, or unauthorised access.

2. Do my customers need to install anything to view protected PDFs?

Nope. Everything runs in-browser. No plugins or downloads required.

3. What happens if someone tries to share the file?

You can track who accessed it, set expiry dates, limit device use, and revoke access anytime.

4. Can I add a watermark with the buyer’s info?

Yes. Dynamic watermarking is baked in and automatically adds personalised watermarks to each document.

5. Is this compatible with Amazon eBook sales?

Absolutely. It’s built specifically for Amazon eBook sellers who need better DRM for their digital products.

Tags / Keywords

  • DRM for Amazon PDF eBooks

  • Protect embedded video in PDF

  • Stop PDF copying and sharing

  • VeryPDF DRM Protector

  • How to secure audio and video in PDFs