Dynamic Semantic Fingerprint™
A protection and tracing service for valuable documents. Upload a manuscript; we return an edition that is encrypted against tampering and carries an invisible fingerprint unique to each buyer. Any leak — a copied paragraph, an AI-rewritten excerpt, even a photo of a printed page — can be traced back to the exact person who leaked it. Built for independent authors and for institutions alike: publishers, universities, research institutes, law firms, and any organization whose documents carry real intellectual property.
Piracy today is a copy-paste — and every traditional protection dies at the clipboard
The main channel of book piracy is no longer file sharing: it is copying text straight off the screen — from a web page, an e-reader, a phone — and pasting it elsewhere. Visible watermarks are cropped away in seconds. File-level "invisible" watermarks live inside the e-book file itself, so the moment text is copied out, reformatted, OCR-scanned or paraphrased by AI, they are gone forever. Hard DRM locks honest readers into clunky apps and is routinely cracked. When a leaked excerpt surfaces online, the author usually cannot prove whose copy it came from. One untraceable leak can erase years of work.
Five capabilities no traditional product offers together
It survives AI paraphrasing
The most dangerous piracy method today is not copying — it is feeding your book into a large AI model and having it rewritten. We benchmarked exactly that: 6 frontier models (Claude, GPT-4o, Gemini, DeepSeek, Qwen, Kimi) × 4 attack levels (verbatim excerpt, single-pass rewrite, two-model relay, ten-pass rewrite) × 3 text lengths — 5,940 samples in total. Result: AUC 0.92–1.00, and on held-out calibration the system flags 90.7–100% of AI-rewritten leaks at a 1% false-positive rate. Even after ten successive rewrites relayed across two different models, the fingerprint still identifies the source buyer. Traditional watermarks are destroyed by a single AI rewrite pass — ours is not.
It survives the clipboard
Today’s main piracy channel is copying text straight off a web page or reader and pasting it elsewhere. Traditional watermarks die at the clipboard. Ours lives in the language itself, so a copied-and-pasted excerpt — from desktop or mobile — still identifies the source buyer.
It survives paper
Our latest milestone: even when a document is printed on a laser printer, then scanned on a flatbed scanner or photographed with a phone, the fingerprint is still recovered and the leaker identified. In production-grade tests, a 14-page scan and desk photos yielded exact buyer identification, and a mixed-evidence examination traced 606/606 lines of a full book. No competitor’s watermark survives the print-scan-photo channel.
It collects nothing
No personal information is required: upload your document, download the protected edition, done. Your original manuscript is destroyed immediately and irreversibly after rendering — only an irreversible fingerprint (no original text) is kept for future tracing. Nothing to breach, nothing to leak.
No Claude models. Ever.
We refuse to use any Claude (Anthropic) model anywhere in our pipeline — none, period. Since August 2026, Claude models embed watermarks into the text they touch; a book processed through them could later be flagged as "AI-generated", putting the author in the impossible position of proving they wrote their own work. That risk is unacceptable to us. Our systems contain no Claude models and have no relationship with them: the ONLY mark ever added to your book is the fingerprint you commissioned — invisible, under your sole control, and removable by no one but you.
Two protections in one pipeline
Document Protection
Every fingerprinted edition can be delivered as a sealed, tamper-evident encrypted container (chunked AES-256-GCM with order-bound authentication + AES-KW key wrapping). Any tampering, block reordering, deletion or truncation is detected — not silently passed. Your original manuscript is destroyed after rendering ("burn after reading"), and every render is sealed into a Merkle evidence chain suitable for court exhibits.
- ◆Tamper, reordering & truncation all detected (4/4 attack classes caught in testing)
- ◆Original manuscript destroyed after rendering
- ◆Merkle-sealed forensic evidence chain
Buyer Tracing
Without changing a single word of the reading experience, a buyer-unique signature is woven into the probability of synonym choices and sentence-structure topology. Because the fingerprint lives in the language itself — not in the file — it survives copy-paste, reformatting, format conversion and OCR re-typing. Paste any suspect excerpt into the console and identify the source buyer in seconds.
- ◆Survives copy-paste, OCR and heavy paraphrasing
- ◆Anti-collusion: identifies groups of up to 3 buyers pooling their copies
- ◆A ~2,000-character excerpt is enough to trace
Verified in production, not in a slide deck
Others watermark the file. We fingerprint the language.
Some competitors add a visible stamp showing the buyer's name; others (BooXtream, Custos) hide data inside the e-book file. Both approaches share one fatal weakness: the mark lives in the file, not in the text. Copy the words out — and the mark is gone. Our fingerprint is the wording itself: statistical patterns of synonym choice that are unique to each buyer and recoverable from any excerpt, from any device, in any format.
| Capability | InsightBridge Fingerprint™ | Visible watermark tools | File-level watermark (BooXtream · Custos) | Hard DRM (Locklizard · Adobe) |
|---|---|---|---|---|
| What is marked | The language itself (semantic layer) | The page image | The e-book file | The e-book file |
| Survives copy-paste of text | ✓ | ✗ | ✗ | ◐ (copy blocked, not traced) |
| Traces a leaked excerpt | ✓ — even ~2,000 characters | ✗ | ✗ — needs the whole file | ✗ |
| Survives print → scan / phone photo | ✓ — tested on real printouts | ✗ | ✗ | ✗ |
| Survives AI paraphrasing (LLM rewrite) | ✓ — AUC 0.92–1.00 across 6 models, 5,940 samples | ✗ | ✗ | ✗ |
| Anti-collusion (2–3 buyers pool copies) | ✓ | ✗ | ✗ | ✗ |
| Encrypted, tamper-evident delivery | ✓ | ✗ | ✗ | ✓ |
| Tamper / reorder / truncation detection | ✓ (4/4 attack classes) | ✗ | ✗ | ◐ |
| Forensic evidence chain (court-ready) | ✓ — Merkle-sealed | ✗ | ◐ | ◐ |
| Reader experience | Any device, any app, no plug-in | Visible stamp on every page | Any device | Locked to vendor reader app |
| Original manuscript retention | None — destroyed after rendering | Vendor-held files | Vendor-held files | Vendor-held files |
| Price for an independent publisher | From $169 per manuscript, one-time | Cheap — but cosmetic | ≈ €0.60 / file + monitoring extra | $500 / month, forever |
Sources: vendor pricing pages & industry press, August 2026 (Locklizard, Vitrium, Digify, EditionGuard, BooXtream, Custos). Feature assessment based on public documentation.
15–20% below comparable protection — and it never bills you twice
Hard-DRM suites charge $500/month, every month, and the protection ends when you stop paying. We charge once per manuscript: the fingerprint and the evidence chain last for the life of the edition.
| Locklizard Safeguard | $500 / month | Hard DRM, visible dynamic watermark |
| Vitrium Security | from $500 / month | Hard DRM |
| Digify | $130 / month | Document tracking, visible watermark |
| EditionGuard (Adobe DRM) | $120 / month + $0.49–1.99 / download | Hard DRM / social DRM |
| BooXtream | ≈ €0.60 / file | File-level invisible watermark only |
| InsightBridge Fingerprint™ | from $169 / manuscript — one-time | Dual layer: encryption + semantic tracing |
Short Work
Standard Monograph
Major Work
Traceability Report
A different science, not a different sticker
The core algorithms — dual-channel collusion-resistant fingerprint codes, order-bound container encryption, forensic-grade deterministic derivation, and distinguishing-bit consistency verification — are original work now in patent filing. This is why no other vendor offers excerpt-level semantic tracing: the math is different, not the marketing.
Protect your next manuscript
Register, pay, upload, and download your protected, traceable edition — self-service, in one sitting.
Open the Author Console