Description
Developer docs: https://inkdnafingerprint.com/docs
Adds an invisible, per-buyer fingerprint to each download—no DRM.
Highlights
* DRM-free: Buyers get normal PDFs/images.
* Per-buyer fingerprints: Embedded at download time.
* Screenshot-resilient: Survives common transforms (marking PDFs; detecting PDFs & images).
* Privacy-aware: Marking happens server-side on your store. The plugin calls the InkDNA API from the server and writes a temporary marked copy locally.
* Works with Woo downloadable products (no catalog changes).
This plugin uses a fixed InkDNA API base endpoint: https://ashtonx24-inkdna.hf.space
External services
This plugin connects to your InkDNA API from the server.
Service host
– https://ashtonx24-inkdna.hf.space (API base)
What is sent (server API)
– For local product files: POST /mark with the PDF file as multipart/form-data.
– For remote product URLs: POST /mark/url with JSON body { "url": "<source pdf url>" }.
– Headers on both requests: X-Order-Id (the WooCommerce order ID) and X-API-Key (set in Settings InkDNA).
When it is sent
– Only when a buyer initiates a download. The store server calls the InkDNA API, receives a fingerprinted PDF, stores it temporarily under wp-content/uploads/inkdna-fingerprinted-downloads/, and serves that local file to the buyer.
What returns
– A fingerprinted (marked) PDF, unique per order.
Service policies
– Terms: https://inkdnafingerprint.com/terms.html
– Privacy: https://inkdnafingerprint.com/privacy.html
– Refunds: https://inkdnafingerprint.com/refunds.html
– EULA: https://inkdnafingerprint.com/eula.html
Installation
- Upload the ZIP and Activate the plugin.
- Go to Settings InkDNA and set:
- API Key (the key assigned/created for your shop)
- API Base (default https://ashtonx24-inkdna.hf.space) and your API Key. The plugin performs server-side marking on download.
- In WooCommerce, create a Downloadable product and attach a PDF.
- Place a test order and download. Each download is uniquely fingerprinted via the InkDNA loader + API.
FAQ
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Do I need an InkDNA account?
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Yes — you or your tenant must have an InkDNA tenant and API Key. The plugin requires that API Key to enable stamping.
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What file types are supported?
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Marking: PDFs
Detecting: PDFs and images (PNG/JPEG) — handled outside WordPress (see “How do I verify a leak?”). -
File size limits?
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Server defaults typically allow ~25–100 MB (configurable). WordPress/PHP upload limits may also apply.
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Is this DRM?
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No. Files remain standard PDFs/images. We embed a robust, invisible fingerprint so you can attribute leaks even after edits/screenshots.
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Does this store my files or customer data?
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The plugin stores a temporary, per-order fingerprinted PDF under wp-content/uploads/inkdna-fingerprinted-downloads/ in order to serve the download. No API keys are exposed to the browser.
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How do I verify a leak?
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Use the Verify page at your InkDNA endpoint (e.g.,
/verify.html) or the hosted verification tool documented at https://inkdnafingerprint.com/docs. Upload the suspect file and review the signed evidence JSON. -
Caching/CDN?
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Do not CDN-cache the API responses; each PDF is unique per buyer. Re-downloads use the local marked copy cached by the plugin in
/wp-content/uploads/inkdna-fingerprinted-downloads/. -
Do I have to send an Order ID?
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Yes. The fingerprint is bound to the order identifier. If omitted at marking time, later verification can still estimate but won’t be provable to a specific purchase.
Reviews
There are no reviews for this plugin.
Contributors & Developers
“InkDNA – Fingerprinted Downloads” is open source software. The following people have contributed to this plugin.
Contributors
Translate “InkDNA – Fingerprinted Downloads” into your language.
Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
0.1.5
Checked and verified working for wp 7.0
0.1.4
- Documentation sync and upload-path fix.
0.1.3
- Marking-only plugin: removed in-admin verification to keep the extension lean and review-safe.
- Fixed API base
https://ashtonx24-inkdna.hf.space; marking is performed server-side (no client loader required). - Updated docs and external-services section for transparency.
0.1.2
- Added “External services” section and developer docs link.
0.1.1
- Minor copy updates.
0.1.0
- Initial release: per-buyer fingerprinting via external API.