SpectraSign
Frequency-domain watermarking and asset signing.
Open Source Licenses
SpectraSign is built upon high-performance open-source libraries. We are grateful to the maintainers of these projects.
FFTW (Faster Fourier Transform in the West)
Version: 3.3.10 | License: GPL-2.0 or later
Primary engine for high-performance Discrete Cosine Transforms via WebAssembly.
Project Websitenoble-ed25519
License: MIT | (c) 2019 Paul Miller
High-performance elliptic curve cryptography for Ed25519 signatures.
GitHub RepositoryEmscripten
License: MIT / LLVM License
The toolchain used to compile FFTW C code into WebAssembly binaries.
Project WebsiteAssemblyScript
License: Apache-2.0
Used for the secondary WASM signal processing fallback engine.
Project WebsiteReed-Solomon (reedsolo port)
License: MIT
Robust error correction for frequency-domain watermark recovery.
Font Awesome
License: CC BY 4.0 / SIL OFL 1.1
Interface iconography for the SpectraSign UI.
My Synced Signatures
Manage your SpectraSign records in the cloud.
| Date | Hashes | Public Key | Issuer | Checks |
|---|
Cryptographic Keys
Your private key never leaves your device. Only your public key is shared for verification.
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Not Generated
Identity Management
Generate a new random local identity or import an existing one.
Authorship Metadata
Extraction Progress
- Preprocessing Image
- Processing...
- Finalizing
Author Name
Verification Failed
No watermark detected or invalid signature.