Security that travels with your file

Secure and track your files with ease using PPAD, a file-based DRM that offers stronger protection, detailed tracking, and seamless support for a wide range of formats—no installations required.

Based on feedback from over 10,000 users on
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Everything You Need to Build DRM into Your App

The PPAD API gives you the tools to enforce digital rights management directly through your app — combining powerful encryption, flexible access control, and seamless viewing without extra software.

AES-256 bit encryption

Ensure only authorized users can open, view, or share your files, no matter where they go.

Access control & File expiration

Instantly control who can view your files and automatically disable access after a specific time.

Print Control

Restrict recipients from printing files to prevent unauthorized sharing or offline copies of your documents.

Dynamic Watermarks

Automatically apply user-specific watermarks with names, emails, or timestamps to deter screenshots and track document leaks.

File tracking & analytics

Monitor file opens, views, and time spent on each page with detailed analytics for better insight and control, even after download.

Device Lock

Control the spread of files by limiting the number of devices they can be viewed on without re-authentication.

Screenshot protection

Mask sensitive content with on-screen shields, preventing unauthorized screen captures.

Offline access

Allow trusted users to access encrypted files without an internet connection while maintaining full security controls.

Mobile Viewing

Provide secure, optimized document viewing on mobile devices without downloads, maintaining protection and accessibility on the go.

Versatile protection for every use case

Not all files are shared the same way, but they all need control.
PPAD gives developers a simple API to embed file protection, tracking, and revocation into any workflow. From digital publishing to due diligence, your files stay secure and your users stay happy.

Deal Workflows

Allow investors to securely download all necessary documents and view them instantly. Track engagement, identify key readers, and measure investor interest.

Government & Public Sector

Maintain compliance and confidentiality.
Use PPAD’s access control and audit features to share classified or policy documents securely, without impacting usability for authorized recipients.

Healthcare & Life Sciences

Protect research data, clinical documents, and patient files.
PPAD helps teams share sensitive materials safely across organizations while maintaining regulatory compliance and audit trails.

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Content & Publishing Platforms

Let paying subscribers store and read files offline safely. Detect unauthorized access attempts and use behavioral insights to strengthen retention and upsell offers.

Training & Education

Provide learners with access to materials even in low-bandwidth environments. Set expiry dates, control file usage, and ensure consistent content distribution.

Technology, Engineering & IP-Intensive Industries

Share designs, specs, and standards without risk of leakage.PPAD keeps proprietary assets safe while allowing legitimate stakeholders to view and collaborate through your app’s native experience.

Security that stays with your file

Most secure file sharing services or data rooms lose protection once the file is downloaded. PPAD ensures your files stay secure, anywhere.

Built-in protection. Files stay secure even when copied,  forwarded, or shared.
Your rules, everywhere. Expiry dates, watermarking, and usage limits remain active.
Offline ready. Recipients can work without the internet after initial access. You still control when access ends.

Patent pending. Designed for control and convenience. ISO27001 certified.

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Answers to our frequently asked questions

AirTwist streamlines your workflow by providing powerful features like task prioritization, collaboration, time tracking.

What is PPAD?

Persistent Protection After Download (PPAD) is a modern approach to Digital Rights Management that helps you keep control over files after they are downloaded. PPAD files follow the rules you set, such as view-only access, expiration dates, or the ability to revoke access.

What is Digital Rights Management (DRM)?

Digital Rights Management (DRM) enables you to set and control copyright protection and data privacy for your intellectual property, such as market research, eBooks, training materials, PDFs modules and reports. DRM protection enables you to prevent your digital files from unauthorized redistribution and restrict how your recipients can copy content.

Is PPAD trustworthy?

Yes. PPAD prioritizes the security and confidentiality of your documents by leveraging Digify’s trusted document security technology. Digify is a leading virtual data room and document security provider trusted by thousands of businesses worldwide, including financial institutions, law firms, and enterprises.

With Digify’s encryption, access control, and tracking features, every document you upload to PPAD remains protected from unauthorized access or sharing.

Do recipients need to install anything?

No. Recipients can open PPAD files directly in their browser without installing additional software.

Does it work offline?

Yes. Once a recipient opens a file, they can continue to access it offline for the duration you allow. Protection rules and restrictions still apply.

What file types are supported?

PPAD supports the following file types:
PDF: (.PDF)
Spreadsheets: (.XLSX)
Document ( .DOC, .DOCX, .MOBI, .ODT, .OTT, .EPUB, .XPS)
Presentation (.PPT, .PPTX, .PPTM, .PPSM, .POTM, .ODP, .OTP)
Private notes: (.TXT)
Images: (.JPG, .PNG, .GIF, .BMP)

Can I revoke access after download?

Yes. You can revoke access or set an expiration date at any time, even after the file has been downloaded.

Is a PPAD file secure?

Yes. PPAD uses encryption and digital rights enforcement to ensure files cannot be copied, forwarded, or modified outside the rules you configure.

Is it safe to install PPAD Viewer?

Yes. The PPAD Viewer runs directly in your browser and there is no risk of downloading malware or unknown programs. You are simply extending your browser’s ability to open .ppad files securely.

What do I do with a .ppad file?

To open a .ppad file, you will need the PPAD Viewer. For full instructions, see our help desk guide on opening PPAD files.