Project Summary
Free, browser-based digital authenticity toolkit (GPL-2.0). Watermark images (9 algorithms), audio (8) and documents (5); compute 21 fingerprint hashes; sign and verify C2PA provenance; issue Ed25519/P-256 DIDs and downloadable PDF/DOCX/EPUB/OTS certificates; run ELA, noise and JPEG-marker forensics. Everything runs locally in the browser so files never leave the machine. A matching Node CLI (redosan-authenticity-cli) is published separately. Honest scope: not a full PDF editor - watermarking, provenance and verification only.
In a Nutshell, RedoSan-Authenticity...
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has a codebase with a very short history
maintained by a large development team
with stable Y-O-Y commits -
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took an estimated 71 years of effort (COCOMO model)
starting with its first commit in May, 2026
ending with its most recent commit 2 days ago
Quick Reference
GNU General Public License v2.0 or later
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Forbidden
Sub-License
Hold Liable
Required
Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummaryOct 5 2026 — Nov 4 2026
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12 Month SummaryNov 4 2025 — Nov 4 2026
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