We sign audio and video from inside the signal. Anyone can check who published it, for free.
We usually reply within one business day.
Why Kernel
Metadata gets lost on the first reshare. Our signature lives inside the audio and video itself, built to withstand what happens to them every day: compression, re-encoding and metadata stripping.
AI detectors guess what is fake. We prove who signed what is authentic, with digital-signature cryptography (Ed25519) and a graded verdict. Never a blind yes.
The Origin
We were born in research: our founder has peer-reviewed scientific publications. If it can't be proven, we don't promise it.
Signal processing, linear algebra and modern cryptography. Math isn't decoration on our product: it is the product.
Every change goes through automated tests and review before it reaches production, and we measure robustness with test batteries on real audio and video. We care about the epsilon, not just the marketing.
Deterministic verdicts: same file, same result, every time. And we publish our limits instead of hiding them.
FAQ
You sign your audio or video from your browser and the signature stays inside the signal, travelling with the file as it is shared. Anyone can then check it for free on Verify and get a graded verdict. See it in 30 seconds.
A European deep-tech startup based in Galicia, Spain, that signs audio and video from inside the signal. The signature is bound to its author's identity, so anyone can later check who published a file and how much of that signature survived.
No, and that's by design. Detectors use AI to guess whether something is fake, and they can get it wrong. We go to the source: authentic content is signed when it's published and anyone can check who signed it. We don't pass judgement on content that was never signed with Kernel.
Yes, in everyday use: it's built to withstand compression, re-encoding and metadata stripping. Heavy edits can degrade it, which is why the result is a graded verdict (Verified, Attested or No match), never a blind yes.
They're complementary. C2PA Content Credentials travel in the metadata, which many platforms strip when they re-encode. Kernel writes the author's signature into the signal itself, so it can still be read once the metadata is gone.
Article 50 of the EU AI Act requires AI-generated or manipulated content to be marked or disclosed. Kernel Security covers the other half: letting genuine content prove who published it. It strengthens AI Act transparency measures, though on its own it does not make an organisation compliant.
Anyone, for free and without an account: upload the file on the public verification page. Only signing is paid, with plans for creators, newsrooms and institutions.
Kernel Security is based in Galicia, Spain, and was founded by José Manuel Ramírez Sánchez, a researcher with peer-reviewed publications. It is qualified by the Xunta de Galicia as a Technology-Based Employment Initiative (IEBT) and was selected for StartTIC, the high-technology incubator of Zona Franca de Vigo.