RedoSan Authenticity

RedoSan Authenticity is a 100% client-side digital authenticity toolkit built with vanilla HTML/CSS/JavaScript (no frameworks). It provides a comprehensive set of tools for proving authenticity and detecting tampering — all running entirely on your device.

Key features:

• Image watermarking (9 algorithms: LSB, DCT, Neural SS, Zero-bit, Multi-bit, Forensic, Fragile, Imatag, Adaptive)
• Audio watermarking (8 algorithms: LSB, Phase Coding, Echo Hiding, DSSS, QIM, DWT Haar, Patchwork, DCT)
• Document watermarking (Whitespace, Zero-width, Synonym, Line-shift, Word-shift)
• Pixel injection (23 algorithms across spatial, frequency, deep-learning and professional families)
• C2PA provenance signing and verification (ECDSA P-256, CBOR/COSE Sign1)
• Cryptographic fingerprinting (17 hashes + 4 perceptual image hashes)
• W3C decentralized identifiers (did:key, Ed25519 / P-256 / RSA)
• OpenTimestamps create/verify/upgrade
• Digital passport certificates (PDF, DOCX, EPUB + QR verification)
• Media format conversion via FFmpeg.wasm
• Forensic tamper analysis (ELA, noise inconsistency, JPEG structure, copy-move)
• Biometric registration and verification (face, voice, iris — all on-device)
• ID generation (UUID v4/v7, ULID, NanoID, SWHID)
• Metadata reading (EXIF)
• Removal tools (strip watermarks, fingerprints, metadata, GPS)
• Built-in bilingual (AR/EN) chatbot

Privacy: everything runs on your device; files are never uploaded to any server. Biometric templates are generated, stored encrypted and matched locally.

License: GNU GPL v2.0 or later. Source code on GitHub.